CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
CapSense® Express™ Controllers with SmartSense™
Auto-tuning - 16 Buttons, 2 Sliders, Proximity Sensors
Cypress Semiconductor Corporation • 198 Champion Court • San Jose,CA 95134-1709 • 408-943-2600
Document Number: 001-85330 Rev. *O Revised January 15, 2018
se® Express™ Control lers with SmartS ense™ Auto-tunin g 16 Buttons, 2 Sliders, Proxi mity Sensors
General Description
The CY8CMBR3xxx CapSense® Express™ controllers enable advanced, yet easy-to-implement, capacitive touch sensing user
interface solutions. This register-configurable family, which supports up to 16 capacitive sensing inputs, eliminates time-consuming
firmware development. These controllers are ideal for implementing capacitive buttons, sliders, and proximity sensing solutions with
minimal development-cycle times.
The CY8CMBR3xxx family features an advanced analog sensing channel and the Capacitive Sigma Delta PLUS (CSD PLUS) sensing
algorithm, which delivers a signal-to-noise ratio (SNR) of greater than 100:1 to ensure touch accuracy even in extremely noisy
environments. These controllers are enabled with Cypress’s SmartSense™ Auto-tuning algorithm, which compensates for
manufacturing variations and dynamically monitors and maintains optimal sensor performance in all environmental conditions. In
addition, SmartSense Auto-tuning enables a faster time-to-market by eliminating the time-consuming manual tuning efforts during
development and production ramp-up.
Advanced features, such as LED brightness control, proximity sensing, and system diagnostics, save development time. These
controllers enable robust liquid-tolerant designs by eliminating false touches due to mist, water droplets, or streaming water. The
CY8CMBR3xxx controllers are offered in a variety of small form factor industry-standard packages.
The ecosystem for the CY8CMBR3xxx family includes development tools—software and hardware—to enable rapid user interface
designs. For example, the EZ-Click Customizer tool is a simple graphical user interface software for configuring the device features
through the I2C interface. This tool also supports CapSense data viewing to monitor system performance and support validation and
debugging. Another tool, the Design Toolbox, simplifies circuit board layout by providing design guidelines and layout
recommendations to optimize sensor size, trace lengths, and parasitic capacitance. To quickly evaluate the CY8CMBR3xxx family
features, use the CY3280-MBR3 Evaluation Kit.
Features
■Register-configurable CapSense Express controller
❐No firmware development required
❐Patented CSD sensing algorithm
❐High sensitivity (0.1 pF)
• Overlay thickness of up to 15 mm for glass and 5 mm for
plastic
• Proximity solutions
• Sensitivity up to 2 fF per count
❐Best-in-class >100:1 SNR performance
• Superior noise-immunity performance against conducted
and radiated noise
• Ultra-low radiated emissions
❐SmartSense Auto-tuning
• Sets and maintains optimal sensor performance during
run time
• Eliminates manual tuning during development and produc-
tion
■Low-power CapSense
❐Average current consumption of 22 µA per sensor at 120-ms
refresh interval
❐Wide parasitic capacitance (CP) range: 5–45 pF
■Advanced user interface features
❐Liquid tolerance
❐User-configurable LED brightness for visual touch feedback
• Up to eight high-sink current GPOs to drive LEDs
❐Buzzer signal output for audible touch feedback
❐Flanking Sensor Suppression (FSS) to eliminate false touch-
es in closely spaced buttons
❐Analog voltage output
❐Attention line interrupt to the host to indicate any change in
sensor status
■System diagnostics to detect
❐Improper value of the modulating capacitor (CMOD)
❐Out of range sensor parasitic capacitance (CP)
❐Sensor shorts
■EZ-Click™ Customizer tool
❐Simple GUI for device configuration
❐Data viewing and monitoring for CapSense buttons, sliders,
and proximity sensors
❐System diagnostics for rapid debug
■I2C slave
❐Supports up to 400 kHz
❐Wake-on-hardware address match
❐No bus-stalling or clock-stretching during transactions
■Low-power 1.71-V to 5.5-V operation
❐Deep Sleep mode with wake-up on interrupt and I2C address
detect
■Industrial temperature range: –40 °C to +85 °C
■Package options
❐8-pin SOIC (150 mil)
❐16-pin SOIC (150 mil)
❐16-pin QFN (3 × 3 × 0.6 mm)
❐24-pin QFN (4 × 4 × 0.6 mm)
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 2 of 42
More Information
Cypress provides a wealth of data at www.cypress.com to help
you to select the right CapSense device for your design, and to
help you to quickly and effectively integrate the device into your
design. For a comprehensive list of resources, see the
knowledge base article KBA92181, Resources Available for
CapSense® Controllers. Following is an abbreviated list for
CapSense devices:
■Overview: CapSense Portfolio, CapSense Roadmap
■Product Selectors: Refer to the "CapSense Selector Guide"
chapter in the Getting Started with CapSense design guide.
CY8CMBR3xxx Ecosystem
Cypress provides a complete ecosystem to enable a quick devel-
opment cycle with the CY8CMBR3xxx CapSense controller
family. This ecosystem includes simple tools for device configu-
ration, design validation, and diagnostics.
Documentation
Design Guides
Design guides are an excellent introduction to a variety of
possible CapSense-based designs. They provide an intro-
duction to the solution and complete system design guidelines.
Refer to the following design guides for CY8CMBR3xxx:
1. Getting Started with CapSense – an ideal starting point for all
CapSense users
2. CY8CMBR3xxx CapSense Design Guide – provides
complete system design guidelines for CY8CMBR3xxx
You can download these design guides from our website:
www.cypress.com/go/capsense.
Registers TRM
The CY8CMBR3xxx Registers TRM lists and details all the
registers of the CY8CMBR3xxx family of controllers in order of
their addresses. These registers may be accessed through an
I2C interface with the host.
Software Utility
EZ-Click Customizer Tool
The EZ-Click Customizer Tool is a simple, GUI-based software
utility that can be used to customize the CY8CMBR3xxx device
configurations.
Use this GUI-based tool to do the following:
1. Select the appropriate part number based on an end-applica-
tion requirement using the Product Selector
2. Configure the device features
3. Observe CapSense data for button and proximity sensors
4. Use the System Diagnostics and built-in test self-test (BIST)
features for debug and production-line testing
Figure 1. Configuring CY8CMBR3xxx using Ez-Click
1
2
3
2
4
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 3 of 42
Tools
Design Toolbox
The Design Toolbox is an interactive spreadsheet tool that
provides application-specific design guidelines for capacitive
buttons. It is used to configure and validate the CapSense
system.
The Design Toolbox:
■Provides general layout guidelines for a CapSense PCB
■Estimates button dimensions based on end-application
requirements
■Calculates power consumption based on button dimensions
■Validates layout design
Evaluation Kits
The CY3280-MBR3 Evaluation Kit can be used to quickly
evaluate the various features of the CY8CMBR3xxx solution.
The kit also functions as an Arduino shield, making it compatible
with the various Arduino-based controllers in the market. You can
purchase this kit at the Cypress online store.
Online
In addition to print documentation, there are abundant web
resources. The dedicated web page for the CY8CMBR3xxx
family has all the current information.
Training
Free PSoC and CapSense technical training (on-demand,
webinars, and workshops) is available online at
www.cypress.com/training. The training covers a wide variety of
topics and supports different skill levels to assist you in your
designs.
Technical Support
For assistance with technical issues, search the Knowledge
Base articles and forums at www.cypress.com/support. If you
cannot find an answer to your question, create a technical
support case or call technical support at 1-800-541-4736.
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 4 of 42
Contents
System Overview .............................................................. 5
Features Overview ............................................................ 6
CapSense Sensors ..................................................... 6
Sliders ......................................................................... 6
Proximity Sensors ....................................................... 6
SmartSense Auto-tuning ............................................. 6
Liquid Tolerance .......................................................... 6
Noise Immunity ............................................................ 6
Flanking Sensor Suppression (FSS) ........................... 6
Touch Feedback .......................................................... 6
General-Purpose Outputs (GPOs) ..............................6
Buzzer Drive ................................................................ 6
Register Configurability ............................................... 7
Communication to Host ............................................... 7
System Diagnostics ..................................................... 7
Ultra-Low Power Consumption ....................................7
MPN versus Features Summary .................................8
Pinouts .............................................................................. 9
CY8CMBR3116 (16 Sensing Inputs) ...........................9
CY8CMBR3106S (16 Sensing Inputs;
Sliders Supported) ............................................................ 11
CY8CMBR3108 (8 Sensing Inputs) ...........................12
CY8CMBR3110 (10 Sensing Inputs) .........................13
CY8CMBR3102 (2 Sensing Inputs) ...........................14
CY8CMBR3002 (2 Sensing Inputs) ...........................14
Unused SPO Pin Connection ....................................15
Unused SPO Pin Connection for AXRES pins ..........15
Unused GPO Pin Connection ....................................15
Device Feature Details ................................................... 16
Automatic Threshold ................................................. 16
Sensitivity Control ...................................................... 16
Sensor Auto Reset .................................................... 16
Noise Immunity .......................................................... 17
Flanking Sensor Suppression ...................................17
General-Purpose Outputs ......................................... 17
LED ON Time ............................................................ 18
Toggle ....................................................................... 18
Buzzer Signal Output ................................................ 18
Host Interrupt ............................................................. 19
Latch Status Output ................................................... 19
Analog Voltage Output .............................................. 19
System Diagnostics ................................................... 20
Register Configurability ................................................. 20
Example Application Schematics .................................21
Power Supply Information ............................................. 23
Electrical Specifications ................................................ 24
Absolute Maximum Ratings .......................................24
Operating Temperature ............................................. 24
DC Electrical Characteristics ..................................... 24
AC Electrical Specifications ....................................... 25
I2C Specifications ...................................................... 26
System Specifications ................................................... 27
Power Consumption and Operational States .............. 29
Response Time ............................................................... 31
CY8CMBR3xxx Resets ................................................... 31
Host Communication Protocol ...................................... 31
I2C Slave Address ..................................................... 31
I2C Communication Guidelines ................................. 32
Write Operation ......................................................... 32
Setting the Device Data Pointer ................................32
Read Operation ......................................................... 33
Layout Guidelines and Best Practices ......................... 34
Ordering Information ...................................................... 34
Ordering Code Definitions ......................................... 34
Packaging Dimensions .................................................. 35
Thermal Impedances ................................................. 37
Solder Reflow Specifications ..................................... 37
Document Conventions ................................................. 38
Units of Measure ....................................................... 38
Glossary .......................................................................... 39
Reference Documents .................................................... 39
Document History Page ................................................. 40
Sales, Solutions, and Legal Information ...................... 42
Worldwide Sales and Design Support ....................... 42
Products .................................................................... 42
PSoC® Solutions ...................................................... 42
Cypress Developer Community ................................. 42
Technical Support ..................................................... 42
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 5 of 42
System Overview
A capacitive sensor detects changes in capacitance to determine
the presence of a touch or proximity to conductive objects. The
capacitive sensor can be a capacitive button that replaces the
traditional mechanical buttons, a capacitive slider that replaces
mechanical knobs, or a proximity sensor that replaces an
infrared sensor in a user interface solution. A typical capacitive
user interface system consists of the following:
■A capacitive sensor
■An audio-visual output, such as a buzzer or an LED
■A capacitive sensing controller connected to the sensor
■A host processor
The capacitive controller connects the sensor and the output to
the host processor through a communication interface, such as
an I2C or a GPO.
The capacitive user interface system serves as a
human-machine interface that takes the user’s touch inputs and
provides audio-visual feedback through a buzzer or an LED.
CY8CMBR3xxx is a family of capacitive sensing controllers,
which senses the change in capacitance based on touch or
proximity, and controls the user interface system accordingly.
The sensing algorithm, built in the controllers, determines the
presence of touch and drives the outputs or sends signals to the
host processor. This algorithm can distinguish between the
signal (based on touch or proximity) and noise, which can be
caused by environmental or electrical conditions.
Figure 2 shows a typical user interface system with capacitive
buttons connected to a CY8CMBR3xxx CapSense Express
controller, which controls the system and also communicates
with the host processor through I2C.
Traditionally, capacitive sensing controllers require firmware
development to perform specific user interface functions and
manual system tuning to achieve optimal performance.
However, the CY8CMBR3xxx CapSense Express family of
controllers does not require any firmware development, acceler-
ating time-to-market. These devices feature SmartSense
Auto-tuning, which eliminates the need for manual tuning,
providing optimal performance even under extremely noisy
conditions.
Figure 2. Typical CapSense System
CY8CMBR3xxx
CapSense Controller
Buzzer
LEDs
Host
Processor
I2C
HI
Linear Slider
Radial Slider
CapSense Sensors
CapSense Buttons
Outputs
Host Interrupt
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 6 of 42
Features Overview
CapSense Sensors
The CY8CMBR3xxx family of controllers supports up to 16
capacitive sensors. These can be configured as follows:
■Up to 16 CapSense buttons
■Up to two sliders: Configurable as linear or radial sliders
■Up to two proximity sensors that can detect up to 30-cm
proximity distance
Sliders
■Supports up to two 5-segment sliders
■Configures each slider individually as linear or radial
■Combines both sliders to form one 10-segment slider
■Slider resolution is user-configurable
Proximity Sensors
■The CY8CMBR3xxx family supports up to two proximity
sensors with a detection range of up to 30 cm. These proximity
sensors are capable of detecting both proximity and touch
events.
■The wake-on-approach feature wakes the devices from a
low-power state to Active mode on a proximity event.
■The device also features driven shield, which enhances the
proximity sensing range in the presence of metal objects.
■The device supports proximity sensors with CP ranging from
8 pF to 45 pF.
SmartSense Auto-tuning
The CY8CMBR3xxx family features SmartSense Auto-tuning,
Cypress's patented CapSense algorithm, which continuously
compensates for system and environmental changes during run
time. SmartSense Auto-tuning has the following advantages:
■Reduces design effort by eliminating manual tuning
■Adapts to variations in PCB, overlay, paint, and manufacturing
that degrade touch-sensing performance
■Eliminates manual tuning in production
■Adapts to changes in the system environment due to noise
■Allows a platform design approach with different overlays,
button shapes, and trace lengths
Liquid Tolerance
The CY8CMBR3xxx family delivers water-tolerant designs that
eliminate false touches due to wet conditions, such as water
droplets, moisture, mist, steam, or even wet hands. The
CapSense controller locks up the user interface in firmware to
prevent touch inputs in streaming water.
The CY8CMBR3xxx family offers liquid-tolerance to liquids such
as water, ketchup, oil, and blood.
Enable the shield electrode through the register map, using
EZ-Click, to prevent false touches under wet conditions and
enable both the shield electrode and guard sensor to prevent
false touches in streaming water conditions. The shield electrode
and guard sensor consume a port pin each in the CapSense
controller. Refer to the CY8CMBR3xxx CapSense Design Guide
for best practices and design guidelines for implementing
liquid-tolerant designs.
Noise Immunity
The CY8CMBR3xxx family features the robust CSD PLUS
capacitive sensing algorithm. Additionally, it implements the
advanced noise immunity algorithm, EMC, for stable operation
in extremely noisy conditions.
The EMC algorithm has higher average power consumption. For
low-power applications, where noise conditions are not extreme,
you can disable this feature through the I2C interface.
Flanking Sensor Suppression (FSS)
This feature distinguishes between signals from closely spaced
buttons, eliminating false touches. It ensures that the system
recognizes only the first button touched.
Touch Feedback
The CY8CMBR3xxx family has pins that you can configure for
audio-visual feedback through a buzzer or an LED.
General-Purpose Outputs (GPOs)
The GPOs are high-sink current outputs that can drive most
LEDs. The GPO status can be controlled directly by the
CapSense sensors so that a sensor 'ON' status automatically
turns ON a corresponding LED. Alternatively, GPOs can be
controlled by the host through the I2C interface.
The GPOs also support advanced features, such as:
■CSx to GPOx Direct Drive: Directly control the GPOs upon
button touch or proximity event.
■Pulse width modulation (PWM): Controls LED brightness.
■Toggle: The GPO status is toggled upon every touch event on
the button sensors, and proximity event on proximity sensors,
to mimic the functionality of the mechanical toggle switch.
■Voltage output: Analog voltage that represents the button
status.
Buzzer Drive
The output pins of the CY8CMBR3xxx controllers can be
configured for driving a single-input DC Piezo-electric buzzer
through a PWM. The PWM frequency and buzzer activation
duration are configurable. The buzzer output is activated for a
finite amount of time when a finger touch is detected.
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 7 of 42
Register Configurability
The CY8CMBR3xxx registers may be configured through the I2C
interface. Device features may be enabled, disabled, or modified
by writing appropriate values to the I2C configurable register
map. This register map also provides various status outputs to
indicate the touch/release status and system performance and
debug parameters.
You can access the register map of the device through the I2C
interface by a host controller, such as a microcontroller or the
EZ-Click Customizer.
The CY8CMBR3xxx devices feature a safe register map update
mechanism to overcome configuration data corruption, which
can occur due to power failure during flash writes or any other
spurious events. If the configuration data is corrupted during a
register map update, the devices reconfigure themselves to the
last known valid configuration.
Communication to Host
The CY8CMBR3xxx family communicates to a host processor
through the following methods:
■The I2C interface allows the host to configure parameters and
receive status information on touch events
■The host interrupt alerts the host when a new touch event
occurs. This helps to build effective communication between
the host and the CapSense controller. Alternatively, the CPU
can poll the device status by reading through I2C.
■The GPO provides the ON or OFF sensor status to the host.
The GPO ports can also be used to implement analog voltage
and DC output (DCO) using an external resistor network.
System Diagnostics
The CY8CMBR3xxx devices are equipped with a system
diagnostics feature to detect system-level fault conditions and to
avoid failure of the user interface design. The system diagnostic
features also help to monitor system-level parameters to debug
the design during development.
The built-in system diagnostics detects the following fault condi-
tions at power-up and helps to monitor the following:
■Improper value of the modulating capacitor (CMOD)
■CP value out of range
■Sensor shorts
Ultra-Low Power Consumption
For low-power applications, such as those operated by a battery,
select a capacitive sensing controller that has ultra-low average
power consumption.
The CY8CMBR3xxx controllers draw an average current of
22 µA per sensor at 1.8 V.
The CY8CMBR3xxx family supports two operating modes:
■Active: The sensors are scanned periodically for power
optimization.
■Deep Sleep: The sensors are not scanned until a command
from the host is received to resume sensor scanning.
In the Active mode, CY8CMBR3xxx family implements additional
techniques, such as optimizing the average power consumption
and providing a smooth user interface experience without
increasing the refresh interval.
In addition to these modes, the device has a wake-on approach
feature, which uses proximity sensing to reduce the average
power consumption, ensuring power saving when the system is
inactive.
Details of all features are documented in Device Feature Details
on page 16.
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 8 of 42
MPN versus Features Summary
The CY8CMBR3xxx family consists of six MPNs, each MPN supporting a different feature set. The following table lists all MPNs and
a summary of the features supported by each.
#Feature CY8CMBR3116 CY8CMBR3106S CY8CMBR3110 CY8CMBR3108 CY8CMBR3102 CY8CMBR3002
1 Maximum number of
buttons
16 11 10 8 2 2
2 Maximum number of
sliders
×2××××
3 Maximum number of
proximity sensors
22222×
4 Shield electrode ✔✔✔✔✔×
5 Guard Sensor ✔×✔✔ ××
6 Wake-on-approach ✔✔✔✔✔×
7 Liquid tolerance ✔×✔✔ ✔ ×
8 Automatic threshold ✔
Configurable
✔
Configurable
✔
Configurable
✔
Configurable
✔
Configurable
✔
9 Threshold Override × ✔×✔✔×
10 Sensitivity Control ✔✔✔✔✔×
11 Sensor auto-reset ✔✔✔✔✔✔
20s
12 Median & IIR filter ✔✔✔✔✔✔
13 Advanced-Low-Pass
Filter
✔×✔✔ ✔ ×
14 Electromagnetic
Compatibility (EMC)
✔✔✔✔✔×
15 FSS ✔✔✔✔✔×
16 Maximum number of
GPOs/LED drive outputs
805412
17 GPO/LED Sink and
Source Drive Support
✔
Configurable
×✔
Configurable
✔
Configurable
✔
Configurable
Sink
18 LED brightness control ✔×✔✔ ✔ ×
19 LED ON time ✔×✔✔ ✔ ×
20 Toggle ✔×✔✔ ✔ ×
21 Buzzer Signal Output ✔✔✔✔××
22 Host interrupt ✔✔✔✔××
23 Latch Status Output ✔✔✔✔✔×
24 Analog Voltage Output ✔×✔✔ ✔ ✔
25 System diagnostics ✔✔✔✔✔✔
26 I2C Interface ✔✔✔✔✔×
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 9 of 42
Pinouts
CY8CMBR3116 (16 Sensing Inputs)
Table 1. Pin Diagram and Definitions - CY8CMBR3116
24-QFN
Pin Diagram
Pin # Pin Name Type Description If unused Default
Configuration
1 CS0/PS0 – CapSense button / proximity sensor,
controls GPO0
Ground/Ground CS0
2 CS1/PS1 – CapSense button / proximity sensor,
controls GPO1
Ground/Ground CS1
3 CS2/GUARD – CapSense button / guard sensor, controls
GPO2
Ground/Ground CS2
4 CS3 – CapSense button, controls GPO3 Ground CS3
5CMOD –External modulator capacitor. Connect
2.2 nF/5 V/X7R or NPO capacitor
NA CMOD
6VCC Power Internal regulator output. Connect a 0.1-µF
decoupling capacitor if VDD > 1.8 V. If VDD
is 1.71 V to 1.89 V, short this pin to VDD.
NA VCC
7VDD Power Power NA VDD
8VSS Power Ground NA VSS
9 CS15/SH/HI I/DO CapSense button / shield electrode/ Host
Interrupt (SPO1 in the register map)
Refer to Unused
SPO Pin Connection
on page 15
HI
QFN
(Top View)
CS0/PS0
CS3
CMOD
VCC
1
2
3
4
5
6
18
17
16
15
14
13
CS7
CS8/GPO0
24
23
22
21
20
19
HI/BUZ/GPO7
I2C SCL
I2C SDA
CS4
CS6
7
8
9
10
11
12
VDD
CS14/GPO6
CS13/GPO5
CS2/GUARD
VSS
CS11/GPO3
CS12/GPO4
CS10/GPO2
CS9/GPO1
CS5
XRES
CS15/SH/HI
CS1/PS1
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 10 of 42
10 CS14/GPO6 I/DO CapSense button / general purpose output
(GPO)
Ground/Refer to
Unused GPO Pin
Connection on
page 15
GPO6
11 CS13/GPO5 I/DO CapSense button / GPO Ground/Refer to
Unused GPO Pin
Connection on
page 15
GPO5
12 CS12/GPO4 I/DO CapSense button / GPO Ground/Refer to
Unused GPO Pin
Connection on
page 15
GPO4
13 CS11/GPO3 I/DO CapSense button / GPO Ground/Refer to
Unused GPO Pin
Connection on
page 15
GPO3
14 CS10/GPO2 I/DO CapSense button / GPO Ground/Refer to
Unused GPO Pin
Connection on
page 15
GPO2
15 CS9/GPO1 I/DO CapSense button / GPO Ground/Refer to
Unused GPO Pin
Connection on
page 15
GPO1
16 CS8/GPO0 I/DO CapSense button / GPO Ground/Refer to
Unused GPO Pin
Connection on
page 15
GPO0
17 CS7 – CapSense button, controls GPO7 Ground CS7
18 CS6[2] – CapSense button, controls GPO6 Connect to VDD CS6
19 CS5 – CapSense button, controls GPO5 Ground CS5
20 CS4 – CapSense button, controls GPO4 Ground CS4
21 I2C SDA DIO I2C data Pull up I2C SDA
22 I2C SCL DIO I2C clock Pull up I2C SCL
23 HI/BUZ/
GPO7
DO Host Interrupt / buzzer output / GPO
(SPO0 in the register map)
Refer to Unused
SPO Pin Connection
on page 15
GPO7
24 XRES XRES Active Low external reset (an active low
pulse on this pin resets the CapSense
Controller)
Leave open XRES
25 Center Pad[1] E-pad Connect to VSS for best mechanical,
thermal, and electrical performance
Floating, not
connected to any
other signal
E-pad
Legend: I = Analog Input, O = Analog Output, DIO = Digital Input/Output, DO = Digital Output, CS = CapSense Button, PS = Proximity Sensor
SH = Shield Electrode, BUZ = Buzzer Output, GPO = General Purpose Output, GUARD = Guard Sensor, SPO = Special purpose output.
Table 1. Pin Diagram and Definitions - CY8CMBR3116 (continued)
24-QFN
Pin Diagram
Pin # Pin Name Type Description If unused Default
Configuration
Notes
1. The center pad on the QFN package should be connected to ground (VSS) for best mechanical, thermal, and electrical performance. If it is not connected to ground,
it should be left floating without being connected to any other signal.
2. This I/O functions as reset (AXRES) pin during boot-up. Make certain that this pin is not grounded during power-up for the device to boot up properly. After boot-up,
this I/O functions as indicated by the pin name.
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 11 of 42
CY8CMBR3106S (16 Sensing Inputs; Sliders Supported)
Table 2. Pin Diagram and Definitions - CY8CMBR3106S
24-QFN
Pin Diagram
Pin # Pin Name Type Description If unused Default
Configuration
1 CS0/PS0 – CapSense button / proximity
sensor
Ground/Ground CS0
2 CS1/PS1 – CapSense button / proximity
sensor
Ground/Ground CS1
3 CS2 – CapSense button Ground CS2
4 CS3 – CapSense button Ground CS3
5CMOD –External modulator capacitor.
Connect 2.2 nF/ 5 V/X7R or
NPO capacitor
NA CMOD
6VCC Power Internal regulator output.
Connect a 0.1-µF decoupling
capacitor if VDD > 1.8 V. If VDD
is 1.71 V to 1.89 V, short this pin
to VDD.
NA VCC
7VDD Power Power NA VDD
8VSS Power Ground NA VSS
9 SLD10 – Slider1, segment0 Ground SLD10
10 SLD11 – Slider1, segment1 Ground SLD11
11 SLD12 – Slider1, segment2 Ground SLD12
12 SLD13 – Slider1, segment3 Ground SLD13
13 SLD14 – Slider1, segment4 Ground SLD14
14 CS11/SLD20 – CapSense button / Slider2,
segment0
Ground/Ground SLD20
15 CS12/SLD21 – CapSense button / Slider2,
segment1
Ground/Ground SLD21
16 CS13/SLD22 – CapSense button / Slider2,
segment2
Ground/Ground SLD22
17 CS14/SLD23 – CapSense button / Slider2,
segment3
Ground/Ground SLD23
18 CS15/SLD24[4] – CapSense button / Slider2,
segment4
Connect to VDD/Connect
to VDD
SLD24
19 CS5/SH/HI – CapSense button / shield
electrode/host interrupt.
(SPO1 in the register map)
Refer to Unused SPO Pin
Connection on page 15
CS5
20 CS4 – CapSense Button Ground CS4
21 I2C SDA DIO I2C Data Pull up I2C SDA
22 I2C SCL DIO I2C Clock Pull up I2C SCL
23 HI/BUZ O Host interrupt / buzzer output.
This pin acts as SPO0 for this
device (SPO0 in register map).
Refer to Unused SPO Pin
Connection on page 15
HI
24 XRES XRES External reset Leave open XRES
25 Center Pad[3] E-pad Connect to VSS for best
mechanical, thermal and
electrical performance
Floating, not connected to
any other signal
E-pad
Legend: I = Analog Input, O = Analog Output, DIO = Digital Input/Output, CS = CapSense Button,
PS = Proximity Sensor, SH = Shield Electrode, BUZ = Buzzer Output, SPO = Special Purpose Output.
QFN
(Top View)
CS0/PS0
CS3
CMOD
VCC
1
2
3
4
5
6
18
17
16
15
14
13
CS14/SLD23
CS13/SLD22
24
23
22
21
20
19
HI/BUZ
I2C SCL
I2C SDA
CS4
CS15/SLD24
7
8
9
10
11
12
VDD
SLD11
SLD12
CS2
VSS
SLD14
SLD13
CS11/SLD20
CS12/SLD21
CS5/SH/HI
XRES
SLD10
CS1/PS1
Notes
3. The center pad on the QFN package should be connected to ground (VSS) for best mechanical, thermal, and electrical performance. If it is not connected to ground,
it should be left floating without being connected to any other signal.
4. This I/O functions as reset (AXRES) pin during boot-up. Make certain that this pin is not grounded during power-up for the device to boot up properly. After boot-up,
this I/O functions as indicated by the pin name.
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 12 of 42
CY8CMBR3108 (8 Sensing Inputs)
Table 3. Pin Diagram and Definitions - CY8CMBR3108
16-QFN
Pin Diagram
Pin # Pin Name Type Description If unused Default
Configuration
1 CS0/PS0 – CapSense button / proximity
sensor, controls GPO0
Ground/Ground CS0
2 CS1/PS1 – CapSense button / proximity
sensor, controls GPO1
Ground/Ground CS1
3CMOD –External modulator capacitor.
Connect 2.2 nF/5 V/X7R or
NPO capacitor
NA CMOD
4VCC Power Internal regulator output.
Connect a 0.1-µF decoupling
capacitor if VDD > 1.8 V. If VDD
is 1.71 V to 1.89 V, short this pin
to VDD
NA VCC
5VDDIO Power Power for I2C and HI lines Connect to VDD VDDIO
6VDD Power Power NA VDD
7VSS Power Ground NA VSS
8 CS4/GPO0 I/DO CapSense button / GPO Ground/Refer to Unused
GPO Pin Connection on
page 15
GPO0
9 CS5/GPO1 – CapSense button / GPO Ground/Refer to Unused
GPO Pin Connection on
page 15
GPO1
10 CS6/GPO2 I/DO CapSense button / GPO Ground/Refer to Unused
GPO Pin Connection on
page 15
GPO2
11 CS7/GPO3/
SH
I/DO CapSense button / GPO/ shield
electrode.
(SPO1 in the register map)
Refer to Unused SPO Pin
Connection on page 15
GPO3
12 CS2/GUARD[6] – CapSense button, controls
GPO2 / guard sensor
Connect to VDD/Connect
to VDD
CS2
13 CS3 – CapSense button, controls
GPO3
Ground CS3
14 I2C SDA DIO I2C data Pull up I2C SDA
15 I2C SCL DIO I2C clock Pull up I2C SCL
16 HI/BUZ DO Host interrupt / buzzer output
Supply voltage for buzzer and
pull-up resistor on HI should be
equal to VDDIO
(SPO0 in the register map).
Refer to Unused SPO Pin
Connection on page 15
HI
17 Center Pad[5] E-pad Connect to VSS for best
mechanical, thermal and
electrical performance
Floating, not connected to
any other signal
E-pad
Legend: I = Analog Input, O = Analog Output, DIO = Digital Input/Output, CS = CapSense Button, PS = Proximity Sensor
SH = Shield Electrode, BUZ = Buzzer Output, GPO = General Purpose Output, GUARD = Guard Sensor, SPO = Special Purpose Output.
CS0/PS0
CMOD
VCC
VDDIO
I2C SCL
I2C SDA
CS3
CS2/GUARD
VDD
CS4/GPO0
CS5/GPO1
CS1/PS1
CS6/GPO2
CS7/GPO3/SH
HI/BUZ
VSS
QFN
(Top View)
1
2
3
4
12
11
10
9
16
15
14
13
5
6
7
8
Notes
5. The center pad on the QFN package should be connected to ground (VSS) for best mechanical, thermal, and electrical performance. If it is not connected to ground,
it should be left floating without being connected to any other signal.
6. This I/O functions as reset (AXRES) pin during boot-up. Make certain that this pin is not grounded during power-up for the device to boot up properly. After boot-up,
this I/O functions as indicated by the pin name.
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 13 of 42
CY8CMBR3110 (10 Sensing Inputs)
Table 4. Pin Diagram and Definitions - CY8CMBR3110
16-SOIC
Pin # Pin Name Type Description If unused Default
Configuration Pin Diagram
1I2C SDA DIO I2C data Pull up I2C SDA
2I2C SCL DIO I2C clock Pull up I2C SCL
3 CS0/PS0 – CapSense button / proximity
sensor, controls GPO0
Ground/Ground CS0
4 CS1/PS1 – CapSense button / proximity
sensor, controls GPO1
Ground/Ground CS1
5CMOD –External modulator capacitor.
Connect 2.2 nF/5 V/X7R or
NPO capacitor
NA CMOD
6VCC Power Internal regulator output.
Connect a 0.1-µF decoupling
capacitor if VDD > 1.8 V. If
VDD is 1.71 V to 1.89 V, short
this pin to VDD
NA VCC
7VDD Power Power NA VDD
8VSS Power Ground NA VSS
9 CS5/GPO0 I/DO CapSense button / GPO Ground/Refer to
Unused GPO Pin
Connection on
page 15
GPO0
10 CS6/GPO1 I/DO CapSense button / GPO Ground/Refer to
Unused GPO Pin
Connection on
page 15
GPO1
11 CS7/GPO2 I/DO CapSense button / GPO Ground/Refer to
Unused GPO Pin
Connection on
page 15
GPO2
12 CS8/GPO3 I/DO CapSense button / GPO Ground/Refer to
Unused GPO Pin
Connection on
page 15
GPO3
13 CS2/GUARD – CapSense button, controls
GPO2 / guard sensor
Ground/Ground CS2
14 CS9/GPO4/HI/
BUZ[7] I/DO CapSense button / GPO /
host interrupt / buzzer output.
(SPO1 in the register map)
Refer Unused SPO
Pin Connection for
AXRES pins on
page 15
GPO4
15 CS3 – CapSense button, controls
GPO3
Ground CS3
16 CS4/SH I/O CapSense button, controls
GPO4 / shield electrode
(SPO0 in the register map).
Refer to Unused
SPO Pin
Connection on
page 15
CS4
Legend: I = Analog Input, O = Analog Output, DIO = Digital Input/Output, CS = CapSense Button, PS = Proximity Sensor
SH = Shield Electrode, BUZ = Buzzer Output, GPO = General Purpose Output, GUARD = Guard Sensor, SPO = Special Purpose Output.
SOIC
CS5/GPO0
CS6/GPO1
CS8/GPO3
CS9/GPO4/HI/BUZ
CS3
16
15
14
13
12
11
1
2
3
4
5
6
7
8
VSS
10
9
CS7/GPO2
CS2/GUARD
I2C SDA
I2C SCL
CS0/PS0
CS1/PS1
CMOD
VCC
VDD
CS4/SH
Note
7. This I/O functions as reset (AXRES) pin during boot-up. Make certain that this pin is not grounded during power-up for the device to boot up properly. After boot-up,
this I/O functions as indicated by the pin name.
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 14 of 42
CY8CMBR3102 (2 Sensing Inputs)
CY8CMBR3002 (2 Sensing Inputs)
Table 5. Pin Diagram and Definitions - CY8CMBR3102
8-SOIC
Pin # Pin Name Type Description If unused Default
Configuration Pin Diagram
1I2C SCL DIO I2C clock Pull up I2C SCL
2CMOD –External modulator capacitor.
Connect 2.2 nF/5 V/X7R or NPO
capacitor
NA CMOD
3VCC Power Internal regulator output. Connect a
0.1-µF decoupling capacitor if VDD
> 1.8 V. If VDD is 1.71 V to 1.89 V,
short this pin to VDD.
NA VCC
4VDD Power Power NA VDD
5VSS Power Ground NA VSS
6CS1/PS1/
GPO0/SH
I/DO/O CapSense button / proximity sensor/
GPO/ shield electrode (SPO0 in the
register map).
Refer to Unused
SPO Pin Connection
on page 15
GPO0
7CS0/PS0
[8] – CapSense button / proximity sensor,
controls GPO0
Connect to VDD/
Connect to VDD
CS0
8I2C SDA DIO I2C data Pull up I2C SDA
Legend: I = Analog Input, O = Analog Output, DIO = Digital Input/Output, CS = CapSense Button, PS = Proximity Sensor,
SH = Shield Electrode, GPO = General Purpose Output, SPO = Special Purpose Output.
Table 6. Pin Diagram and Definitions - CY8CMBR3002
8-SOIC
Pin # Pin Name Type Description If unused Pin Diagram
1GPO1 DO Active-low GPO with
open-drain-low drive mode
Ground
2CMOD I/O External modulator capacitor.
Connect 2.2 nF/5 V/X7R or NPO
capacitor
NA
3VCC Power Internal regulator output. Connect
a 0.1-µF decoupling capacitor if
VDD > 1.8 V. If VDD is 1.71 V to
1.89 V, short this pin to VDD.
NA
4VDD Power Power NA
5VSS Power Ground NA
6 CS1 – CapSense button, controls GPO1 Ground
7CS0
[8] – CapSense button, controls GPO0 Connect to VDD
8GPO0 DO Active-low GPO with
open-drain-low drive mode
Ground
Legend: I = Analog Input, DO = Digital Output, CS = CapSense Button, GPO = General Purpose Output
SOIC
1
2
3
4
8
7
6
5
Vdd
P0[4], A, I
P0[2], A, I
P1[0], I2C
, I, P0[5]
, I, P0[3]
CL, P1[1]
Vss
GPO1 GPO0
CMOD
VCC
VDD
CS0
CS1
VSS
Note
8. This I/O functions as reset (AXRES) pin during boot-up. Make certain that this pin is not grounded during power-up for the device to boot up properly. After boot-up,
this I/O functions as indicated by the pin name.
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 15 of 42
Unused SPO Pin Connection
The following table lists the recommended pin connections for different configurations of SPO pins if an SPO pin is unused. Note that
this table is not applicable to SPO pins which act as AXRES during boot up.
Unused SPO Pin Connection for AXRES pins
Unused SPO pins which act as AXRES during boot up should be left open and should be disabled through the I2C configurable register
map (using Ez-Click or any other configuration tool mentioned in section “Configuring CY8CMBR3xxx” of CY8CMBR3xxx CapSense
Design Guide).
Unused GPO Pin Connection
The following table lists the recommended pin connections for different drive modes of GPO pins if a GPO pin is unused. Note that
this table is not applicable to GPO pins which act as AXRES during boot up.
Table 7. Unused SPO Pin Connection
SPO Pin Configuration Recommended pin connection if unused
CS Connect to Ground
HI Leave Open
SH Leave Open
GPO Refer to “Unused GPO Pin Connection” Table
BUZ Leave Open
Disabled Leave Open
Table 8. Unused GPO Pin Connection
GPO drive mode Recommended pin connection if unused
Open Drain Low Connect to Ground
Strong Leave Open
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 16 of 42
Device Feature Details Automatic Threshold
■Dynamically sets all threshold parameters for button sensors,
depending on the noise in the environment.
■Can be enabled or disabled through the register map.
■Applicable only to button sensors.
■Mutually exclusive from the EMC feature. If EMC is enabled,
automatic threshold is automatically disabled.
■Allows overriding of calculated thresholds with particular values
specified through the register map. Refer to the CY8CMBR3xxx
CapSense Design Guide for more details.
Sensitivity Control
This feature allows specification of the minimum change in
sensor capacitance that can trigger a sensor state change (OFF
to ON or vice-versa).
■Sensitivity can be specified individually for each CapSense
button and slider.
■Sensitivity can be specified as one of the four available values:
0.1 pF, 0.2 pF, 0.3 pF, and 0.4 pF.
■Higher sensitivity values can be used for thick overlays or small
button diameters.
■Lower sensitivity values should be used for large buttons or
thin overlays to minimize power consumption.
Sensor Auto Reset
This feature resets the CapSense sensors to the OFF state after
a specific time period, even though they continue to be activated.
■Resets the sensor baseline to the current raw count after a
specific time period, even though the sensors continue to be
activated.
■Prevents a stuck sensor when a metal object is placed close
to that sensor.
■The Auto Reset period can be set to 5 or 20 seconds and can
be configured through two global settings provided in the
register map:
❐Global setting for all proximity sensors
❐Global setting for all CapSense buttons and slider segments
■The guard sensor does not undergo Auto Reset.
Figure 3. Example of Button Auto Reset on GPO0 (DC Active
Low Output)
Table 9. Device Feature Benefits
Feature Benefits
Automatic Threshold Automatically tunes all the threshold
parameters of the sensors for
different noise settings
Sensitivity Control Maintains optimal button
performance for different overlay
and noise conditions
Sensor Auto Reset Recalibrates the sensor when a
stuck-sensor (fault) condition
occurs, and avoids invalid sensor
output status to host
Noise Immunity Provides immunity against external
noise and the ability to detect
touches without false trigger in noisy
environments
Flanking Sensor
Suppression (FSS)
Avoids multiple button triggers in a
design with closely spaced buttons
Host Controlled GPOs GPO pins, which can be controlled
by the host processor through I2C
LED On time GPO output status stays ON for a
set duration after the touch is
released to provide better visual
feedback to the user
Toggle Sensor output status toggles on
every sensor activation to mimic the
mechanical toggle button
functionality
Buzzer Signal Output Provides audio feedback on button
touch
Host Interrupt Provides interrupt to host when
there is a change in sensor status
Latch Status Output Latches the sensor status changes
in the register until the host reads
the activated sensor status; this
ensures that the sensor status is
always read by the host even if the
host is late to service the host
interrupt signal from CY8CMBR3xxx
Analog Voltage Output Indicates the button status through
voltage levels
System Diagnostics Supports production testing and
debugging
Low-Power Sleep Mode
and Deep Sleep Mode
Reduces power consumption
CSx
GPOx
AutoResetPeriod
GPOxturnsinactiveasAuto
ResetperiodexpiredforCSx
Sensor
Activated
TouchonSensor
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 17 of 42
Noise Immunity
■The CY8CMBR3xxx family features the robust CSD PLUS
capacitive sensing algorithm.
■Uses pseudo-random sequence (PRS) clock source to
minimize electromagnetic interference.
■Provides advanced noise immunity algorithm, that is, electro-
magnetic compatibility (EMC), for superior noise immunity
against external radiated and conducted noise
❐EMC algorithm has higher average power consumption. For
low-power applications, where noise conditions are not ex-
treme, this feature can be disabled using the EZ-Click tool.
■Provides median and IIR filters for button and slider sensors.
■Provides an Advanced-Low-Pass (ALP) filter for proximity
sensors.
Flanking Sensor Suppression
■Distinguishes between signals from closely spaced buttons,
eliminating false touches.
■Can be enabled or disabled individually on each CapSense
button.
■On touch detection by two or more sensors on which FSS is
enabled, only the first touched sensor reports active status.
■Allows only one button at a time to be in the Touch state.
■Supported only on CapSense buttons.
Figure 4. Reported Sensor Status with FSS Enabled
General-Purpose Outputs
■Supports up to eight GPOs, multiplexed with sensor inputs or
other functionality, depending on the part number.
■Provides GPO status control. GPOs can be configured to be
controlled by the sensor input or the host through the I2C
interface.
■Allows for configurable Active LOW or Active HIGH logic output.
The Active LOW logic output can be configured to directly drive
LEDs in the current sink mode. The Active HIGH logic output
can be configured to interface the GPOs with the host and other
circuits.
■The GPOx status will not be retained in the Deep Sleep mode.
The GPOx output state will be reset to default during deep sleep
and upon wake-up from deep sleep.
Figure 5. CSx Controls GPOx (Active HIGH Logic)
■Supports two drive modes:
❐Open-drain drive mode (HIGH-Z and GND) for analog volt-
age outputs and LED direct drive
❐Strong drive mode (VDD and GND) to interface with the host
and other circuits
■Supports PWM on GPOs for LED brightness control. Two
different duty cycles can be configured for Sensor Touch and
No Touch states (Active and Inactive state duty cycles). When
the GPO is host-controlled, and if the PWM control is enabled
for the GPO, the same Touch and No Touch duty cycles will be
used for the On and Off states of the host-controlled GPO.
■When the proximity sensor is enabled, the proximity event
controls the respective GPOs. A touch event on a proximity
sensor is indicated only through the I2C register map.
■Sensor fault conditions are indicated with the pulse signal on
the respective GPOs at power-up by system diagnostics.
CS0 CS1 CS2 CS3
CS0 CS1 CS2 CS3
CS2 also touched along with CS1,
CS1 is reported ON
No sensor touched
CS0 CS2 CS3
CS0 CS2CS1 CS3
CS1
CS1 is touched, CS1 reported ON
Only CS2 is touched; reported ON
C
S
2
C
S
1
C
C
C
C
S2
CSx
GPOx
Sensor
Activated
Sensor
Deactivated
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 18 of 42
LED ON Time
■Keeps the GPO status ON for a particular period of time after
the falling edge of a sensor, for better visual indication through
LEDs
Figure 6. CSx Controls GPOx with LED ON Time Enabled
■Can be enabled only when the GPO is directly controlled by a
CapSense sensor
■Can be enabled or disabled on each sensor and the ON Time
duration can be configured from 0 to 2 seconds in 20-ms incre-
ments
■Can be enabled in all configurations of GPOs except the Toggle
mode
■Not applicable when the sensor status is turned off by Sensor
Auto Reset
Toggle
■The controller can toggle the GPO state at every rising edge
of a sensor activation event to mimic the functionality of a
mechanical toggle switch (a touch event for a button sensor
and a proximity event for proximity sensors activates a sensor).
Figure 7. CSx Controls GPOx with the Toggle Enabled
■Can be enabled only when the GPO is directly controlled by a
capacitive sensor.
■Can be enabled or disabled individually on each capacitive
sensor.
■Can be enabled in all configurations of GPOs—that is, Active
LOW and Active HIGH DC output, PWM output, open-drain,
and strong drive modes.
Buzzer Signal Output
■Produces a PWM signal to drive a Piezo-Buzzer that generates
audio feedback when a touch is detected on a CapSense button
or a guard sensor.
■Supports buzzer connection, as shown in the following figure.
Figure 8. Buzzer Connection[9]
■PWM frequency is configurable: The buzzer frequency is
configurable to meet different Piezo-Buzzer drive requirements
and to provide different tones. The buzzer frequency may be
configured either by using the EZ-Click tool or by writing to the
corresponding control register. Refer to System Specifications
on page 27 for the supported buzzer frequencies.
■Generates PWM output for a fixed duration (ON time) when a
touch is detected. The ON time is configurable through
EZ-Click, from 100 ms to 12.7 s, in steps of 100 ms,
■Buzzer signal output and EMC (refer to the CY8CMBR3xxx
Registers TRM) are mutually exclusive features. These must
not be enabled simultaneously.
Figure 9. Buzzer Activation on a Touch Event
The buzzer output does not restart if multiple trigger events occur
before the Buzzer ON Time elapses.
CSxbitin
BUTTON_STAT
GPOx
LEDONTime
BUTTON_STAT
registershows
sensorinactivation
CSxphysical
status
Sensor
Deactivated
Buttonresponsetime
Sensor
Activated
CSx
GPOx
Sensor
Activated
Sensor
Deactivated
Sensor
Activated
CY8CMBR3xxx
BUZ
Buzzer
VDDIO
CSx
BUZ
BuzzerONTime
CSxActive
Sensor
Activated
Note
9. Buzzer must be connected between VDDIO and the BUZ pin. If VDDIO is not available on the device, connect the buzzer to VDD instead of VDDIO.
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 19 of 42
Figure 10. Buzzer Operation with Consecutive Touches
If the buzzer is not currently active, the buzzer output starts on
each trigger event.
■When the buzzer is enabled, the buzzer output toggles between
a Logic HIGH state and a Logic LOW state, to drive the buzzer
when active. When the buzzer is inactive, the buzzer output
maintains a Logic HIGH state.
■The buzzer ON Time has a range of (1 to 127) × 100 ms.
Host Interrupt
This feature generates a pulse signal on any change in the
CapSense sensors' status.
■The host interrupt is an active LOW pulse signal generated on
the HI pin during any change in the sensor status or slider
position.
■The duration of the active LOW host interrupt pulse is THI (refer
to System Specifications on page 27).
■The minimum time between two HI pulses is equal to one
refresh interval.
Figure 11. Host Interrupt Line with CSx Buttons Touched
Separately
■The host interrupt pin has the open-drain low-drive mode.
■This pin is powered by VDDIO in CY8CMBR3108. This allows
communication with a host processor at voltage levels lower
than the chip VDD.
■Only one pin can be configured as the host interrupt on devices
that have a host interrupt functionality on multiple pins.
Latch Status Output
■Allows to read both current status (CS) and latch status (LS)
to avoid missing button touches.
■CS and LS can be read through registers, BUTTON_STAT, and
LATCHED_BUTTON_STAT respectively.
Tab l e 10 explains the various combinations of CS and LS.
Analog Voltage Output
Some of the applications use analog voltage as an effective
method to indicate the sensor status to the host controller. A
simple external resistor network can be used with GPOs of
CY8CMBR3xxx to generate analog voltage output upon touch
detection for such applications.
The CY8CMBR3xxx GPOs support the open-drain low-drive
mode. In this mode, the sensor “touch” state is indicated by a
logic LOW signal on the GPO and a "no touch" state is indicated
by the HIGH-Z signal. With the external resistor shown in Figure
12, when a sensor is touched, the respective GPO is driven to a
logic LOW signal. This forms a simple voltage divider and
produces a voltage output. All the other GPOs are in HIGH-Z
states because their respective sensors are in the "no touch"
state.
Figure 12. Voltage Output Using GPO and Resistor Network
The output analog voltage can be calculated based on the
following equation:
Here, Rn represents the series resistor value of any given GPO.
Note If more than one button is activated at the same time, the
Rn becomes equivalent (parallel) to all Rn resistors.
BUZ
BuzzerONTime
CSx
Sensor
Activated
Sensor
Re‐activated
HI
CSx
Sensor
Activated
THI
Sensor
Deactivated
Table 10. Latch Status Read
CS LS Description
0 0 CSx is not touched during the current I2C read
Host has already acknowledged any previous CSx touch in
the previous I2C read
0 1 CSx was touched before the current I2C read
This CSx touch was missed by the host
R0
GPO0
GPO1
GPO2
GPO3
GPO4
GPO5
GPO6
GPO7
CS0
CS1
CS2
CS3
CS4
CS5
CS6
CS7
R1
R2
R3
R4
R5
R6
R7
VOUT
CY8CMBR3xxx
CS0
CS1
CS2
CS3
CS4
CS5
CS6
CS7
R
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 20 of 42
■For the circuit represented in Figure 12 to work, GPOs should
be configured in the Active LOW logic, open-drain drive mode.
PWM must be disabled and the CSx-to-GPOx direct drive must
be enabled (that is, GPOs must be configured as
sensor-controlled).
■The FSS feature can be enabled so only one button is reported
ON at a time.
System Diagnostics
System Diagnostics is a BIST feature that tests for faulty sensor,
shield, or CMOD conditions at device resets.
■If any sensor fails these tests, a 50-ms pulse is sent out on the
corresponding GPO (that is, the pulse is observed on GPOx if
CSx fails the test), and the sensor is disabled.
■If the shield fails the tests, a 50-ms pulse is sent out on all GPO s
and all the sensors are disabled.
■If CMOD fails the tests, a 50-ms pulse is sent out on all GPOs
and all the sensors are disabled.
■System Diagnostics failure pulses are sent within device
boot-up time.
■The System Diagnostics status is also updated in the register
map. Therefore, the host can also read test results through the
I2C interface.
Sensor CP > 45 pF
If the parasitic capacitance of a sensor is more than 45 pF, the
sensor is disabled.
Improper value of CMOD
If the value of CMOD is less than 1 nF or greater than 4 nF, all
sensors are disabled (the recommended value of CMOD is
2.2 nF).
Sensor shorts
System Diagnostics also checks for the following errors:
■Sensor shorted to Vss[10]
■Sensor shorted to VDD
■Sensor shorted to another sensor
■Sensor shorted to shield
Register Configurability
The CY8CMBR3xxx family features an I2C configurable register
map. The CY8CMBR3xxx registers are divided into three
categories, as Ta b l e 11 shows.
The CY8CMBR3xxx devices feature a safe register map update
mechanism to overcome configuration data corruption, which
can occur due to power failure during execution of "Save"
command or any other spurious events.
If the configuration data is corrupted when the device is saving
data, on the next reset, the devices reconfigure themselves to
the last known valid configuration. If there is no valid configu-
ration saved by user, the devices load the factory default config-
uration as specified in Register TRM.
Table 11. CY8CMBR3xxx Registers
Register
Category
Register
Map
Address
range
Description
Configu-
ration
Registers
0x00-0x7E These registers contain the config-
uration data for the CY8CMBR3xxx
controllers. A host can write into
these registers and save the data to
non-volatile memory by writing to
CTRL_CMD command register.
Note that the new configuration
takes effect only after the configu-
ration is saved to non-volatile
memory and the device is reset (see
CY8CMBR3xxx Resets on
page 31).
Command
Registers
0x80-0x87 These registers accept commands
from host. Any command written to
these register is executed within
TI2C_LATENCY_ MAX from the I2C
acknowledgement of the command.
Status
Registers
0x88-0xFB These are read only registers and
indicate the status of command
execution, system diagnostics and
sensor data.
Note
10. Sensor shorts to Vss are detected for all pins other than the pin, which is AXRES also for a given package.
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 21 of 42
Example Application Schematics
Figure 13. Example Schematics Demonstrating Four Buttons and Four GPOs
In Figure 13[11, 12], the CY8CMBR3108 device is configured in
the following manner:
■CS0–CS3: CapSense buttons
❐All CapSense pins must have a 560-ohm series resistance
(placed close to the chip) for improved noise immunity.
■GPO0–GPO3: To external LEDs
❐LEDs are connected in sinking mode because the
CY8MBR3xxx devices have high sink current capability.
❐Series resistances are connected to limit the GPO current to
be with IIL limits.
■CMOD pin: 2.2 nF to ground
■VCC pin: 0.1 µF to ground
■VDD pin: To external supply voltage
❐1-µF and 0.1-µF decoupling capacitors connected to VDD
■VDDIO pin: To supply voltage, which is VDD
❐VDDIO powers I2C and HI lines.
❐1-µF and 0.1-µF decoupling capacitors connected to VDDIO.
■I2C_SCL and I2C_SDA pins: 330 ohms to the I2C header
❐For I2C communication: It is assumed that the I2C line pull-up
resistors are present on the host side outside the I2C header.
■HI pin: To host
❐To prompt the host to initiate an I2C transaction for reading
the changed sensor status.
I2C_SCL
I2C_SDA
I2C_SCL
I2C_SDA
HI (TO HOST)
CMOD
VCC
VDD
VDD
VDD
VDD
VDD
VDDIO
VDDIO
J1
I2C HEADER
1
2
3
4
5
R4 560E
D4
C5
1uF
D2
R2330E
R8
1K
R1330E
CS0
R9 1K
U1
CY8CMBR3108(16-QFN)
CS0/PS0
1
CS1/PS1
2
CMOD
3
VCC
4
VDD_IO
5
VDD
6
VSS
7
CS4/GPO0
8
CS5/GPO1 9
CS6/GPO2 10
CS7/GPO3/SH 11
CS2/GUARD 12
CS3 13
I2C_SDA 14
I2C_SCL 15
HI/BUZ 16
R5560E
D3
R3560E
C6
0.1uF
D1 R6 1K
C4
0.1uF
C2
1uF
CS2
CS3
C1
0.1uF
C3
2.2nF
R7 1K
R10560E
CS1
Notes
11. VCC should be connected to VDD for 1.71 V VDD 1.89 V.
12. Proper ground layout is important for better SNR performance. Refer to the CY8CMBR3xxx CapSense Design Guide and Getting started with CapSense guide for
all layout guidelines.
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 22 of 42
Figure 14. Example Schematics Demonstrating Multiple Sensor Types
In Figure 14[13, 15], the CY8CMBR3106S device is configured in
the following manner:
■PS0: CapSense proximity sensor
■CS1–CS4: CapSense buttons[14]
■CMOD pin: 2.2 nF to ground
■VCC pin: 0.1 uF to ground
■VDD pin: To external supply voltage
❐1-µF and 0.1-µF decoupling capacitors connected to VDD
■SLD10-SLD14: CapSense linear slider segments
■SLD20-SLD24: CapSense radial slider segments
■BUZ: To buzzer
❐AC buzzer (1-pin).
❐Buzzer second pin to ground.
■I2C_SCL and I2C_SDA pins: 330 ohm to the I2C header. It is
assumed that the I2C line pull-up resistors are present on the
host side outside the I2C header.
❐For I2C communication.
■HI pin: To host
❐To prompt the host to initiate an I2C transaction for reading
the changed sensor status.
■XRES pin: Floating
❐For external reset.
PSO
SLD10
SLD11
SLD12
SLD13
SLD14
I2C_SCL
I2C_SDA
CMOD
VCC
SLD10
SLD11
SLD12
SLD13
SLD14
SLD22
SLD21
SLD20
SLD24
SLD23
HI (TO HOST)
XRES
SLD20
SLD24
I2C_SCL
I2C_SDA
SLD21
SLD22
SLD23
VDD
VDD
VDD
VDD
R18100E
R10560E
C4
0.1uF
R6560E
CS2
CS3
R8560E
R15 560E
R16 560E
R2 330E
R11 560E
CS1
R9 560E
R13 560E
CSS1
CapSense Linear Slider 5 Seg
R3560E
R17 560E
CapSense Radial slider 5-Seg
R12 560E
R7 560E
BUZZER
U1
CY8CMBR3106S(24-QFN)
CS0/PS0
1
CS1/PS1
2
CS2
3
CS3
4
CMOD
5
VCC
6
VDD
7
VSS
8
SLD10
9
SLD11
10
SLD12
11
SLD13
12
SLD14 13
CS10/SLD20 14
CS9/SLD21 15
CS8/SLD22 16
CS7/SLD23 17
CS6/SLD24 18
CS5/SH/BUZ 19
CS4 20
I2C_SDA 21
I2C_SCL 22
HI/BUZ 23
XRES 24
R4560E R5 560E
CS4
J1
I2C HEADER
1
2
3
4
5
C2
2.2nF
C3
0.1uF
C1
1uF
R14 560E
R1 330E
Notes
13. VCC should be shorted to VDD for 1.71 V VDD 1.89 V.
14. All CapSense pins have 560-ohm series resistance (placed close to the chip) for improved noise immunity.
15. Proper ground layout is important for better SNR performance. Refer to the CY8CMBR3xxx CapSense Design Guide and Getting started with CapSense guide for
all layout guidelines.
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 23 of 42
Power Supply Information
The CY8CMBR3xxx family of controllers contains three supply
domains: VDD, VCC, and VDDIO.
■VDD: This is the primary supply to the chip and can be powered
from 1.8 V ± 5% (Externally regulated mode) or 1.8 to 5.5 V
(Internally regulated mode). The CapSense controller is
powered by the VDD supply, and all the I/O signal levels (except
I2C lines, HI, and XRES) are referenced with respect to the VDD
supply. For packages and MPNs that do not have VDDIO, the
I2C SDA, I2C SCL, HI, and XRES signal levels are also
referenced with respect to the VDD supply.
■VDDIO: This is the supply input for I2C SDA, I2C SCL, HI, and
XRES lines. The signal levels of these I/Os are referenced with
respect to VDDIO. The VDDIO supply can be as low as 1.71 V
and as high as the voltage of the VDD supply. The VDDIO should
not be powered at a voltage higher than that of the VDD supply.
The VDDIO is available only on select packages. For a package
that does not have VDDIO, the I2C SDA, I2C SCL, HI, and XRES
signal levels are referenced with respect to the VDD supply.
■VCC: This is the internal regulator output, which powers the
core and capacitive sensing circuits. A 0.1-µF, 5-V ceramic
capacitor should be connected close to the VCC pin for better
performance.
■Power sequencing: The CY8CMBR3xxx device does not
require any power supply sequencing for the VDD and VDDIO
supplies. Either of these supplies can ramp earlier or later than
the other. The only requirement is that VDDIO should not be
greater than VDD.
■1.8-V externally regulated operation: When VDD is powered
with a 1.8 V ±5% supply, the VCC and VDD pins should be
shorted externally and the SUPPLY_LOW_POWER bit in the
DEVICE_CFG3 register should be set to 1 through the I2C
interface (refer to the CY8CMBR3xxx Registers TRM for details
on the register). When the VCC and VDD pins are shorted, this
bypasses the internal voltage regulator. Under this condition,
make certain that VDD does not exceed 1.89 V.
Note: If EZ-Click is used to configure the device, it automatically
takes care of the required register settings based on the voltage
settings selected in EZ-Click.
The CY8CMBR3xxx family of controllers is factory-configured for
1.8-V to 5.5-V operation. To configure a factory-configured
device for 1.8-V externally regulated operation, you can use the
following procedure:
■Short VDD and VCC.
■Power the device at 1.8 V (note that regardless of the value of
the SUPPLY_LOW_POWER bit, the device can be powered at
1.8 V for configuring the device; only CapSense operation is
not guaranteed if the SUPPLY_LOW_POWER bit is not
properly configured)
■Use EZ-Click to configure the device for 1.8-V operation.
■Save and reset the device.
■Ground consideration: Both the VSS pin and the metal pad
(E-pad) of the device should be connected to board ground.
Figure 15. Power Supply Connections for CY8CMBR3xxx CapSense Controllers[16]
*SUPPLY_LOW_POWERbitinDEVICE_CFG3registershouldbesetto1
tooperatedeviceat1.8V(±5%)
CY8CMBR3xxx
VDD
VDDIO
VSS
1.71 V < VDDIO < VDD
1.8 V to 5.5 V
1 F
0.1 F
VCC
0.1 F
CY8CMBR3xxx
VDD
VDDIO
VSS
1.71 V < VDDIO < VDD
1.71 V to 1.89 V
0.1 F
VCC
1 F
Power supply connections when 1.8 < VDD < 5.5 V Power supply connections* when 1.71 < VDD < 1.89 V
0.1 F0.1 F
1 F1 F
Note
16. Proper ground layout is important for best performance. Refer to the layout guidelines mentioned in the CY8CMBR3xxx CapSense Design Guide and Getting started
with CapSense guide.
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 24 of 42
Electrical Specifications
Absolute Maximum Ratings
Operating Temperature
DC Electrical Characteristics
DC Chip-Level Specifications
The specifications in Table 14 are valid under these conditions: –40 °C TA 85 °C. Typical values are specified at TA = 25 °C,
VDD = 3.3 V, and are for design guidance only.
Table 12. Absolute Maximum Ratings[17]
Parameter Description Conditions Min Typ Max Units
VDD_MAX Max voltage on the VDD pin relative to VSS –40 °C to +85 °C TA, absolute maximum –0.5 – 6 V
VDDIO_MAX Max voltage on the VDDIO pin relative to VSS –40 °C to +85 °C TA, absolute maximum 0.5 – 6 V
VCC_MAX Max voltage on the VCC pin relative to VSS Absolute maximum –0.5 – 1.89 V
VIO DC input voltage relative to VSS on I/O –40 °C to +85 °C TA, absolute maximum –0.5 – VDD+0.5 V
ESD_HBM Electrostatic discharge, human body model Human body model ESD. 2200 – – V
ESD_CDM Electrostatic discharge, charged device
model Charged device model ESD 500 – – V
ILU Latch-up current limits Maximum/minimum current to any input
or output, pin-to-pin or pin-to-supply –140 – 140 mA
IIO Current per GPIO – – 25 mA
Table 13. Operating Temperature
Parameter Description Conditions Min Typ Max Units
TOOperation temperature Ambient temperature inside system
enclosure –40 25 85 °C
TJJunction temperature –40 – 100 °C
Table 14. DC Chip-Level Specifications
Parameter Description Conditions/Details Min Typ Max Units
VDD Chip supply voltage
VCC shorted to VDD 1.71 1.8 1.89 V
VCC not shorted to VDD. VCC connected
to 0.1 µF decoupling capacitor 1.8 – 5.5 V
VDDIO Supply voltage I/O
1.71 V < VDD < 1.89 V 1.71 – VDD V
1.8 V < VDD < 5.5 V 1.71 – VDD V
VDD_RIPPLE
Maximum allowed ripple on power
supply, DC to 10 MHz
+25 °C TA, VDD > 2 V, sensitivity 0.1 pF – – ±50 mV
+25 °C TA, VDD > 1.75 V, CP < 20 pF,
sensitivity = 0.4 pF ––±25mV
CEFC
External regulator voltage bypass
(capacitor to be connected to the VCC pin) X5R ceramic ±10% or better – 0.1 – µF
CEXC
Power supply decoupling capacitor on
VDD
X5R ceramic or better – 1 – µF
Note
17. Usage above the absolute maximum conditions listed in Tab le 1 2 may cause permanent damage to the device. Exposure to absolute maximum conditions for
extended periods of time may affect device reliability. The maximum storage temperature is 150 °C in compliance with JEDEC Standard JESD22-A103, High
Temperature Storage Life. When used below absolute maximum conditions, but above normal operating conditions, the device may not operate to specification.
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 25 of 42
XRES DC Specifications
DC I/O Port Specifications
The specifications in Table 16 are valid at –40 °C TA +85 °C. Typical parameters are specified at TA = 25 °C and are for design
guidance only.
AC Electrical Specifications
XRES AC Specifications
Table 15. XRES DC Specifications
Parameter Description Conditions/Details Min Typ Max Units
VIH_XRES Input voltage high threshold on XRES pin CMOS input 0.7*VDD ––V
VIL_XRES Input voltage low threshold on XRES pin CMOS input – – 0.3*VDD V
CIN_XRES Input capacitance on XRES pin – – 7 pF
VHYSXRES Input voltage hysteresis on XRES pin
VDD ≤ 4.5 V – 0.05*VDD –mV
VDD > 4.5 V 200 – – mV
RPULLUP Pull-up resistor 3.5 5.6 8.5 k
Table 16. DC I/O Port Specifications
Parameter Description Conditions Min Typ Max Units
VOH Output voltage HIGH level
IOH = –4 mA at 3 V VDD VDD–0.6 ––V
IOH = –1 mA at 1.8 V VDD VDD–0.5 ––V
VOL Output voltage LOW level
IOL = 4 mA at 1.8 V VDD ––0.6V
IOL = 10 mA at 3 V VDD ––0.6V
CPIN Pin capacitance All VDD, all packages, all I/Os –37pF
ITOT_GPIO Maximum total sink chip current – – 85 mA
Table 17. AC Chip-Level Specifications
Parameter Description Conditions Min Typ Max Units
TSR_POWER_UP Power supply slew rate during power-up –40 °C ≤ TA ≤ 85 °C, all VDD 1–67V/ms
Table 18. XRES AC Specifications
Parameter Description Conditions/Details Min Typ Max Units
TXRES External reset pulse width –40 °C ≤ TA ≤ 85 °C, all VDD 5––µs
Note
18. VIH must not exceed VDD + 0.2 V.
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 26 of 42
Memory
I2C Specifications
Table 19. Flash Specifications
Parameter Description Min Typ Max Units Details/Conditions
FEND[19] Flash endurance 100 K – – cycles
FRET[19] Flash retention. TA 55 °C, 100 K P/E cycles 20 – – years
Note
19. Guaranteed by characterization.
Table 20. I2C Specifications
Parameter Description Min Typ Max Units Conditions
FSCLI2C_FM I2C SCL clock frequency 0 – 400 kHz
THDSTAI2C_FM Hold time (repeated) START condition; after this
period, the first clock pulse is generated 0.6 – – µs
TSUSTAI2C_FM Setup time for a repeated START condition 0.6 – – µs
TLOWI2C_FM LOW period of the SCL clock 1.3 – – µs
THIGHI2C_FM HIGH period of the SCL clock 0.6 – – µs
THDDATI2C Data hold time 0 – – µs
TSUDATI2C_FM Data setup time 100 – – ns
TSUSTOI2C_FM Setup time for I2C STOP condition 0.6 – – µs
CB_FM Capacitive load for each I2C bus line – – 400 pF
TVDDATI2C_FM Data valid time – – 0.9 µs
TVDACKI2C_FM Data valid acknowledge time – – 0.9 µs
TSPI2C_FM Pulse width of spikes suppressed by the input filter – – 50 ns
TBUFI2C_FM Bus-free time between STOP and START condition 1.3 – – µs
VIL_I2C Input LOW voltage –0.5 – 0.3 * VDD V2-mA sink
VIH_I2C Input HIGH Voltage 0.7* VDD – – V 3-mA sink
VOL_I2C_L Output LOW voltage, low supply range – – 0.2 * VDD VVDD < 2 V, 3-mA sink
VOL_I2C_H Output LOW voltage, high supply range – – 0.4 V VDD > 2 V, 3-mA sink
IOL_I2C_FM I2C output low current 6 – – mA
Fast Mode, 1.71 V ≤ VDD ≤
5.5 V, load = CB_SM, VOL =
0.6 V
I2C_VHYS_HV I2C input hysteresis 0.05 * VDD – – mV Fast and standard mode I2C
speeds. 2 V ≤ VDD ≤ 4.5 V
I2C_VHYS_5V5 I2C input hysteresis 200 – – mV Fast and standard mode I2C
speeds. 4.5 V < VDD < 5.5 V
I2C_VHYS_LV I2C input hysteresis 0.1 * VDD – – mV Fast and standard mode I2C
speeds. VDD < 2 V
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 27 of 42
Figure 16. I2C Bus Timing Diagram for Fast or Standard Modes
System Specifications
The specifications in the following table are valid at TA = 25 °C and VDD = 5 V, unless otherwise specified.
Table 21. System Specifications
Parameter Description Conditions/Details Min Typ Max Units
CPSupported parasitic capacitance range of
sensors
0.2-pF sensitivity, SNR 5:1 5 – 45 pF
0.1-pF sensitivity, SNR 5:1 12 – 35 pF
0.1-pF sensitivity, SNR 4:1 5 – 45 pF
CMOD Value for CMOD external capacitor 5-V rating, X7R or NP0 Cap.
CP ≤ 45 pF –2.2–nF
IAVG_NT Average current per button with no finger
touch
VDD = 5 V, 3.3 V, 2.5 V, 1.8 V,
CP = 10 pF, 2 buttons,
Refresh interval = 120 ms, EMC
disabled, 0.4-pF sensitivity
––22
A
IAVG_WT Average current with finger touch
VDD = 5 V, 3.3 V, 2.5 V, 1.8 V,
CP = 10 pF, 8 buttons,
Refresh interval =120 ms, EMC
disabled, 0.4-pF sensitivity
––600
A
Note
20. Save command takes 220 ms to execute.
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 28 of 42
IAVG_WF Average current with EMC
VDD = 5 V, 3.3 V, 2.5 V, 1.8 V,
CP = 10 pF, 8 buttons,
Refresh interval =120 ms, EMC
enabled, 0.4-pF sensitivity
––300
A
IAVG_NF Average current without EMC
VDD = 5 V, 3.3 V, 2.5 V, 1.8 V,
CP = 10 pF, 8 buttons,
Refresh interval = 120 ms, EMC
disabled
––100
A
IDS Deep Sleep current with I2C on VDD ≤ 3.3 V, TA = 25 °C, I2C Enabled –2.5–A
TBOOT_SYS
Boot-up time (time from power-up to first
sensor scan) with system diagnostics
enabled and EMC disabled
16 buttons, CP ≤ 18 pF ––900ms
TBOOT_WF
Boot-up time (time from power-up to first
sensor scan) with no system diagnostics
and EMC enabled
10 buttons, CP ≤ 18 pF ––850ms
TBOOT
Boot-up time (time from power-up to first
sensor scan) with no system diagnostics
and EMC disabled
16 buttons, CP ≤ 18 pF ––400ms
TBOOT_SYS_WF
Boot-up time (time from power-up to first
sensor scan) with both system
diagnostics and EMC enabled.
10 buttons, CP ≤ 18 pF – – 1350 ms
TI2CBOOT Boot up time (time from power to I2C
ready) ––15ms
TI2C_LATENCY_
MAX
Time between I2C command and
execution (for all commands except the
"Save"[20] command) ––50ms
THI Host interrupt pulse width 5 V, 1.8 V 200 – 700 s
FBUZ_4 Buzzer output frequency 5 V, 1.8 V – 4.00 – kHz
FBUZ_2.67 Buzzer output frequency 5 V, 1.8 V – 2.67 – kHz
FBUZ_2 Buzzer output frequency 5 V, 1.8 V – 2.00 – kHz
FBUZ_1.60 Buzzer output frequency 5 V, 1.8 V – 1.60 – kHz
FBUZ_1.33 Buzzer output frequency 5 V, 1.8 V – 1.33 – kHz
FBUZ_1.143 Buzzer output frequency 5 V, 1.8 V – 1.14 – kHz
FBUZ_1 Buzzer output frequency 5 V, 1.8 V – 1.00 – kHz
FPWM GPO PWM frequency 5 V, 1.8 V – 106.7 – Hz
TSNS_RST5 Sensor auto-reset interval 5 sec 5 V, 1.8 V – 5 – sec
TSNS_RST20 Sensor auto-reset interval 20 sec 5 V, 1.8 V – 20 – sec
TFAULTY_SNS_P
ULSE
Pulse width on GPOx when the
corresponding CSx fails the system
diagnostics test
–50–ms
CP_SHIELD
Maximum CP supported for shield
electrode ––100pF
Table 21. System Specifications (continued)
Parameter Description Conditions/Details Min Typ Max Units
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 29 of 42
Power Consumption and Operational States
The CY8CMBR3xxx family of controllers is designed with
multiple low-power operational states to meet the low-power
requirements of battery-powered applications. These controllers
have the following operational states (see Figure 17):
1. Boot: The devices load the last-known configuration data and
run system diagnostics tests.
2. Active: The sensors are scanned at a fixed refresh rate to
determine the presence of touch, proximity, or finger position
on a slider, and any configured outputs (GPOs, buzzer and
HI) are driven. The refresh time in this state is the total
scanning and processing time of sensors, or 20 ms (typical)
whichever is higher.
3. Look-for-Touch: All the sensors are scanned at a much
slower, user-configured refresh interval, and any enabled
GPOs (such as PWM or DC Toggle) are driven.
4. Look-for-Proximity: Only proximity sensors enabled for
wake-on approach are scanned. No outputs are driven in this
state.
5. Deep Sleep: No sensors are scanned, and the CY8CM-
BR3xxx devices are in a Low-power State with no processing.
The GPO status is reset to the default value in the Deep Sleep
mode.
6. Configuration: No scanning or reporting occurs and the
devices wait for a reset for the configuration settings to take
effect.
The CY8CMBR3xxx controllers automatically manage
transitions between four operational states (Boot, Active,
Look-for-Touch, and Look-for-Proximity). The host can force
transition in and out of the Deep Sleep state. A host command
can alter the configuration data, causing a transition to the
Configuration state. A transition to Configuration state can also
occur automatically after boot, if the configuration data is
corrupted.
The Active state emphasizes a high refresh rate (that is, low
refresh interval) for fast responses to button touches and
proximity events. The Look-for-Touch state enables low power
consumption during periods of no-touch activity.
The Look-for-Proximity state allows ultra-low power
consumption when a human body is not in close proximity. This
state is entered only if the wake-on-approach feature is enabled
(and the toggle is disabled). In this state, the CY8CMBR3xxx
controllers periodically scan proximity sensors to determine the
presence of a human body. If they detect human presence, the
controllers enter the Look-for-Touch state, in which they scan all
sensors at a slow, user-configured refresh interval. If a touch is
detected, the controllers enter the Active state. The controllers
remain in the Active state as long as the touch is present. In this
state, they update the sensor status and drive the corresponding
outputs. A transition from Active to Look-for-Touch occurs when
no touch is detected and the buzzer is not driven. Similarly, a
transition from Look-for-Touch to Look-for-Proximity occurs
when no proximity is detected.
The following parameters configure the operational states:
■State timeout (Register STATE_TIMEOUT) defines the
following:
❐Minimum time (in seconds) of no touch activity in the Active
state
❐Minimum time to trigger a transition to the Look-for-Touch
state
❐Minimum time of no touch activity in the Look-for-Touch state
❐Minimum time to trigger a transition to the Look-for-Proximity
state
■Refresh Interval (Register REFRESH_CTRL) defines the
minimum time between the start of subsequent scans in the
Look for Touch and Look-for-Proximity states.
■The Refresh Interval for the Active state is fixed at 20 ms.
During all three operational states—Active, Look-for-Touch, and
Look-for-Proximity, within each refresh interval, the devices
enter a Low-power State after scanning and processing the
requisite sensors. This helps to maintain the lowest average
power consumption within any refresh interval. Note that if any
I2C traffic is detected on the I2C bus or the I2C_SCL is held low,
the devices do not enter the Low-power State after scanning and
processing the sensors. This ensures that the devices do not
send unnecessary NACKs to I2C transactions because of
periodical entry to the Low-power State. Therefore, the device
requires I2C interface to be in “free” state and I2C lines to be
pulled up for power optimization.
Refer to section “System Design Recommendations for Low
Power Consumption” in CY8CMBR3xxx CapSense Design
Guide for low power design considerations.
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 30 of 42
Figure 17. CY8CMBR3xxx Operational States and Transitions
Boot
(B)
Reset Active
(A)
Configuration
(C)
Configuration Corrupted
Look-for-Touch
(T)
Look-for-Proximity
(P)
Deep Sleep
(S)
No Touch
SLEEP Command
Reset
I2C Commands
SLEEP Command
I2C Commands
SLEEP Command
Touch Detected
No Touch
Proximity
Detected
I2C Commands
I2C Address Match
Valid configuration
data found
Reset
Reset
Reset
Touch Detected
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 31 of 42
Response Time
Response time for button and proximity sensors is the minimum
amount of time for which the sensor must be active/inactive
(touched or proximity present), for the device to detect it as a
valid activation or deactivation event.
For the CY8CMBR3xxx device family, response time numbers
for different sensors can be estimated using the design toolbox.
The following response time numbers are provided in the
toolbox:
■RFBT: This value represents the response time for first button
touch when the device is in the Look-for-Touch or
Look-for-Proximity operational states.
■RCBT: This value represents the response time for consecutive
button touches when the device is in the Active operational
state.
■RFST: This value represents the response time for the first slider
touch when the device is in the Look-for-touch operational
state.
■RCST: This value represents the response time for consecutive
slider touches when the device is in the Active operational state.
■RBSR: This value represents the response time for button and
slider release events when the device is in the Active opera-
tional state.
■RProx: This value represents the response time for detecting
valid proximity events on a proximity sensor.
■RProx_release: This value represents the response time for
proximity release events on a proximity sensor.
CY8CMBR3xxx Resets
The CY8CMBR3xxx family of CapSense controllers has three
reset options – two hardware resets and one software reset.
■Hardware Resets
❐Power reset –Toggling the power on the VDD pin of the Cap-
Sense controller resets the controller.
❐XRES reset – Pull the device XRES pin LOW for TXRES du-
ration and then pull it HIGH.
■Software Reset
To reset the software, write one SW_RESET command to the
command register. All three resets are functionally equivalent,
and the CapSense controllers enter the Boot state (refer to the
Power Consumption and Operational States section) after any
reset.
Host Communication Protocol
The CY8CMBR3xxx CapSense controllers communicate to the
host through the I2C interface. I2C is a simple two-wire
synchronous communication protocol that uses the following two
lines:
■Serial Clock (SCL) –This line is used to synchronize the slave
with the master.
■Serial Data (SDA) – This line is used to send data between the
master and the slave.
The CY8CMBR3xxx I2C interface has the following features:
■Bit rate of 400 kbps
■Configurable I2C slave address (7-bit)
■No bus-stalling or clock-stretching during transactions
■Register-based access to the I2C master for reads and writes
■Repeated START support
The CY8CMBR3xxx CapSense controllers can be part of a
single-slave or a multi-slave environment.
Figure 18. I2C Communication Between One Master
and One Slave
I2C Slave Address
To identify each device on the I2C bus, a unique 7-bit I2C slave
address is used. When the master wants to communicate with a
slave on the bus, it sends a START condition followed by the
appropriate I2C address. The START condition alerts all slaves
on the bus when a new transaction starts. The slave with the
specified I2C address acknowledges the master. All the other
slaves ignore further traffic on the bus until the next START
condition is detected.
The 7-bit I2C Slave Address for CY8CMBR3xxx devices can be
configured by modifying the contents of I2C_ADDR register
mentioned in CY8CMBR3xxx Registers TRM. Refer to section
“Configuring CY8CMBR3xxx” in CY8CMBR3xxx CapSense
Design Guide for more details on how to configure CY8CM-
BR3xxx registers.
The I2C address can be configured to any value between 0x08
to 0x77. The default I2C address for all CY8CMBR3xxx devices
is 0x37.
HOST CY8CMBR3xxx
HI
SCL
SDA
VDD VDD
VDD
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 32 of 42
I2C Communication Guidelines
1. After device reset, the host should wait for TI2CBOOT time
before initiating any I2C communication. The CY8CMBR3xxx
CapSense controller family will generate a NACK if the host
tries to communicate before this period.
2. The CY8CMBR3xxx controller is expected to NACK the
address match event if it is in the low-power state (during any
of the operational states – Deep Sleep, Look-for-Touch,
Look-for-Proximity, or Active). The controller wakes up from
the low-power state on an address match but sends NACK
until it transitions into the Active state and, on for the first
transaction, in the active state. When the device NACKs a
transaction the host is expected to retry the transaction until
it receives an ACK.
3. If there is a delay of more than 340 ms between two subse-
quent bytes within an I2C transaction, the device may go into
low-power state and the host may get a NACK.
4. When the host sends the SAVE_CHECK_CRC command, the
device will send a NACK on any subsequent I2C transactions
until the command execution is completed. The time taken to
complete the SAVE_CHECK_CRC command is 220 ms typ.
5. The host must not write to read-only registers. All write opera-
tions directed to such read-only registers are ignored.
Write Operation
A host performs the following steps during a write operation:
1. The host sends the START condition.
2. The host specifies the slave address, followed by the
read/write bit to specify a write operation.
3. The device may NACK the host.
4. The host sends a Repeat Start (or a stop followed by a start
condition), followed by the address and read/write bit, to
specify a write operation. The host keeps sending the Repeat
Start with the address and read/write bits until the device
sends an ACK. The device ACKs the host.
5. The host specifies the register address to which it has to write.
6. The device ACKs the host.
7. The host starts sending the data to the device, which is written
to the register address specified by the host. This is followed
by an ACK from the device.
8. If the write operation includes more bytes, each one is written
to the successive register address. Each successive byte is
followed by an ACK from the device.
9. After the write operation is complete, the host sends the STOP
condition to the device. This marks the end of the communi-
cation (see Figure 19).
Figure 19. Host Writing x Bytes to the Device
Setting the Device Data Pointer
The host sets the device data pointer to specify the starting point
for future read operations. Setting the device data pointer
involves the following steps:
1. The host sends the START condition.
2. The host specifies the slave address, followed by the
read/write bit to specify a write operation.
3. The device may NACK the host.
4. The host sends a Repeat Start, followed by the address and
read/write bit, to specify a write operation. The host keeps
sending the repeat start with the address and read/write bit
until the device sends an ACK.
5. The device ACKs the host.
6. The host specifies the register address. Any further read
operation will take place from this address.
7. The host sends the STOP condition (see Figure 20).
Figure 20. Host Setting the Device Data Pointer
Slave
Address`
Register
Address(n) Data[n] Data[n+1] Data[n+x]
SA
6
A
5
A
4
A
3
A
2
A
1
A
0
R
WAR
7
R
6
R
5
R
4
R
3
R
2
R
1
R
0AD
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0AD
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0AD
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0AP
ACK
ACK
ACK
ACK
ACK
Write
Start
Stop
N
Start
NACK
SA
6
A
5
A
4
A
3
A
2
A
1
A
0
R
WN
Slave
Address`
Start
NACK
SA
6
A
5
A
4
A
3
A
2
A
1
A
0
R
WAAP
Slave
Address`
ACK
ACK
Write
Start
Stop
R
5
R
4
R
3
R
2
R
1
R
7
R
6
R
0
N
Start
NACK
Register
pointer
SA
6
A
5
A
4
A
3
A
2
A
1
A
0
R
WN
Slave
Address`
Start
NACK
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 33 of 42
Read Operation
The host performs the following steps for a read operation:
1. The host sends the START condition.
2. The host specifies the slave address, followed by the
read/write bit to specify a write operation.
3. The device may NACK the host.
4. The host sends a repeat start followed by the address and
read/write bit to specify a write operation. The host keeps
sending the repeat start with the address and read/write bits
until the device sends an ACK.
5. The device ACKs the host.
6. The device retrieves the byte from the pre-specified register
address and sends it to the host. The host ACKs the device.
7. Each successive byte is retrieved from the successive
register address and sent to the host, followed by ACKs from
the host.
8. After the host receives the required bytes, it NACKs the
device.
9. The host sends the STOP condition to the device. This marks
the end of the communication (see Figure 21).
Figure 21. Host Reading x Bytes from the Device
Legend:
Slave
Address`
Data[n] Data[n+2] Data[n+x]
ACK
ACK
ACK
ACK
NACK
Read
Start
Stop
SA
6
A
5
A
4
A
3
A
2
A
1
A
0
R
WAD
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0AD
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0AD
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0AD
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0NP
Data[n+1]
N
Start
NACK
SA
6
A
5
A
4
A
3
A
2
A
1
A
0
R
WN
Slave
Address`
Start
NACK
CY8CMBR3xxxtoHost
HOSTtoCY8CMBR3xxx
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 34 of 42
Layout Guidelines and Best Practices
Cypress provides an extensive set of design guidelines for CapSense board designs. Refer to the CY8CMBR3xxx CapSense Design
Guide for complete system guidelines.
Ordering Information
The CY8CMBR3xxx family consists of six parts that vary depending on the parameters. The following table lists all the parts and a
summary of the features supported. All package types are also available in Tape and Reel.
Ordering Code Definitions
Table 22. Ordering Information
Ordering Code Package
Type
Operating
Temperature
Total
Capacitive
Sensing
Inputs
CapSense
Buttons
Sliders Proximity
Sensors
GPOs Shield Communication
Interface
CY8CMBR3116-LQXI 24-pin QFN Industrial Up to 16 Up to 16 0Up to 2 Up to 8 1 I2C / GPO
CY8CMBR3106S-LQXI 24-pin QFN Industrial Up to 16 Up to 11 Up to 2 Up to 2 0 1 I2C
CY8CMBR3110-SX2I 16-pin SOIC Industrial Up to 10 Up to 10 0Up to 2 Up to 5 1 I2C / GPO
CY8CMBR3108-LQXI 16-pin QFN Industrial Up to 8 Up to 8 0Up to 2 Up to 4 + HI 1 I2C / GPO
CY8CMBR3102-SX1I 8-pin SOIC Industrial Up to 2 Up to 2 0Up to 2 Up to 1 1 I2C/GPO
CY8CMBR3002-SX1I 8-pin SOIC Industrial 2 2 0 0 2 0 GPO
Tape and Reel
Temperature Range:
I = Industrial
Package Type: XXX = LQX or SX2 or SX1
LQX = 24-pin QFN (Pb-free) or 16-pin QFN (Pb-free);
SX2 = 16-pin SOIC (Pb-free);
SX1 = 8-pin SOIC (Pb-free)
X = blank or S
blank = sliders are not supported;
S = device supports sliders
Number of CapSense Buttons: XX = 16 or 06 or 10 or 08 or 02
16 = 16 Buttons;
10 = 10 Buttons;
08 = 8 Buttons;
06 = 6 Buttons;
02 = 2 Buttons
Configuration interface: X = 1 or 0
1 = I2C Configurable;
0 = H/W Configurable
3rd generation MBR family
Mechanical Button Replacement
Technology Code: C = CMOS
Marketing Code: 8 = PSoC
Company ID: CY = Cypress
IC MBR XX - XXXCY 8 3 X X (T)
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 35 of 42
Packaging Dimensions
Figure 22. 24-pin QFN (4 × 4 × 0.55 mm) Package Outline
Figure 23. 16-pin QFN (3 × 3 × 0.6 mm) Package Outline
001-13937 *F
001-87187 *A
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 36 of 42
Figure 24. 16-pin SOIC (150 Mils) Package Outline
Figure 25. 8-pin SOIC (150 Mils) Package Outline
51-85068 *E
51-85066 *I
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 37 of 42
Thermal Impedances
Solder Reflow Specifications
Tab l e 24 illustrates the minimum solder reflow peak temperature to achieve good solderability.
Table 23. Thermal Impedances
Parameter Description Conditions Min Typ Max Units
TAOperating ambient temperature –40 25 85 °C
TJOperating junction temperature –40 – 100 °C
TJA Package θJA (24-pin QFN) – 38 – °C/Watt
TJC Package θJC (24-pin QFN) – 5.6 – °C/Watt
TJA Package θJA (16-pin QFN) – 49.6 – °C/Watt
TJC Package θJC (16-pin QFN) – 5.9 – °C/Watt
TJA Package θJA (16-pin SOIC) – 142 – °C/Watt
TJC Package θJC (16-pin SOIC) – 49.8 – °C/Watt
TJA Package θJA (8-pin SOIC) – 198 – °C/Watt
TJC Package θJC (8-pin SOIC) – 56.9 – °C/Watt
Table 24. Solder Reflow Specifications
Package Maximum Peak Temperature Time at Maximum Temperature
8-pin SOIC 260 °C 30 s
16-pin SOIC 260 °C 30 s
16-pin QFN 260 °C 30 s
24-pin QFN 260 °C 30 s
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 38 of 42
Document Conventions
Units of Measure
Table 25. Units of Measure
Symbol Units of Measure
°C degrees Celsius
fF femtofarad
Hz hertz
kbps kilobits per second
kHz kilohertz
kkilo ohm
MHz megahertz
µA microampere
µF microfarad
µs microsecond
mA milliampere
ms millisecond
mV millivolt
nA nanoampere
ns nanosecond
nV nanovolt
ohm
pp peak-to-peak
pF picofarad
s second
Vvolt
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 39 of 42
Glossary
Reference Documents
CPParasitic capacitance.
EZ-Click The customizer tool (GUI) that enables easy register configurability and debugging for the CY8CM-
BR3xxx family of controllers.
GPO General Purpose Output – that is, an output pin on a chip that the user can configure.
FSS Flanking Sensor Suppression. An algorithm that distinguishes between signals from closely spaced
buttons, eliminating false touches. It ensures that the system recognizes only the first button touched.
SmartSense Cypress CapSense algorithm that continuously compensates for system, manufacturing, and
environmental changes.
SNR A ratio of the sensor signal, when touched, to the noise signal of an untouched sensor.
Toggle An MBR device feature that toggles the state of GPOs on every sensor activation.
Open-Drain Low-Drive
mode
An output pin drive mode wherein logic 0 is represented by a low voltage (that is, Voltage < VOL), whereas
logic 1 is represented by floating the output line to a HIGH impedance state.
Strong Drive mode An output pin drive mode where logic 0 is represented by a low voltage (that is, Voltage < VOL), whereas
logic 1 is represented by a high voltage (that is, Voltage V > VOH).
Raw counts A count value representing a digital count equivalent of sensed capacitance.
Baseline A filtered version of the raw counts. The baseline essentially tracks the value of the parasitic capacitance
in the system but does not track the value of the finger capacitance.
Parasitic capacitance The intrinsic capacitance of PC board traces to sensors.
Finger capacitance Additional capacitance introduced on a CapSense sensor when a finger approaches/touches the sensor.
Global setting A setting value that is common for all elements of a set.
Active LOW signal A signal that indicates the active state by logic 0 and the inactive state by logic 1 values.
Active HIGH signal A signal that indicates the active state by logic 1 and the inactive state by logic 0 values.
Low-power State A state where the device does not perform any processing and hence consumes less power.
Document Title Description
CapSense CY8CMBR3xxx Design Guide Provides design guidance for using capacitive touch sensing (CapSense) function-
ality with the CY8CMBR3xxx family of CapSense controllers.
Getting Started with CapSense® Provides a starting point for anyone who is new to capacitive touch sensing
(CapSense) and for anyone learning key design considerations and layout best
practices.
Design Toolbox Includes four sections – General Layout Guidelines for a CapSense PCB, a layout
estimator for estimating button dimensions, a power consumption calculator (based
on button dimensions), and the Design Validation tool to validate the layout design.
EZ-Click User Guide Gives instructions on how to install and uninstall the EZ-Click Customizer tool and
describes how to set up the boards. It also includes detailed descriptions of all the
tabs in the GUI.
CY8CMBR3xxx Programming Specifications Gives the information necessary to program the nonvolatile memory of the CY8CM-
BR3xxx devices. It describes the communication protocol required for access by an
external programmer, explains the programming algorithm, and gives electrical
specifications of the physical connection.
CapSense® Express™ Controllers Registers
TRM
Lists and details all registers of CY8CMBR3102, CY8CMBR3106S, CY8CM-
BR3108, CY8CMBR3110, and CY8CMBR3116 CapSense® Express™ controllers.
All registers are listed in the order of address.
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 40 of 42
Document History Page
Document Title: CY8CMBR3002, CY8CMBR3102, CY8CMBR3106S, CY8CMBR3108, CY8CMBR3110, CY8CMBR3116
Datasheet CapSense® Express™ Controllers with SmartSense™ Auto-tuning 16 Buttons, 2 Sliders, Proximity Sensors
Document Number: 001-85330
Revision ECN Orig. of
Change
Submission
Date Description of Change
*G 4359354 DCHE 05/06/2014 Updated links to the following web pages: EZ-Click, Cypress online store, and
MBR3 Evaluation Kit.
Changed time at max temperature from 20 seconds to 30 seconds.
*H 4557306 PRIA 11/26/2014 Replaced the term “water tolerance” with “liquid tolerance” wherever appli-
cable.
Added MPN versus Features Summary table.
Corrected pin naming in the CY8CMBR3116 pin diagram (see Ta b l e 1 ).
Added footnotes 2, 4, 6, 7, and 8 to specify AXRES pins.
Changed “if unused” recommendation for I2C lines to “pull-up” in the Pinouts
section.
Added details for Automatic Threshold feature.
Mentioned about filters in Noise Immunity feature details.
Added note to System Diagnostics feature ‘Sensor shorts’ to mention that
sensor shorts can be detected for all pins other than AXRES.
Added Register Configurability section.
Mentioned that devices optimize power only when the I2C bus is free in Power
Consumption and Operational States.
Updated I2C Communication Guidelines to mention that the devices also
NACK to the first transaction in the Active state.
Updated Figure 23 for clarity. Changed pin size “0.18–0.30” to “0.24 ± 0.06"
Added definition of “low-power state” to Glossary.
*I 4626833 PRIA 01/16/2015 Added More Information.
Moved CY8CMBR3xxx Ecosystem section to page 2.
*J 4681058 YLIU /
PRIA
03/10/2015 Updated Ordering Information:
Added Note “All package types are available in Tape and Reel.” and referred
the same note in Table 22.
Added Ordering Code Definitions.
*K 4735762 WKA 05/07/2015 Updated Packaging Dimensions:
spec 001-13937 – Changed revision from *E to *F.
Updated Thermal Impedances:
Updated Table 23:
Updated entire table.
*L 4812567 PRIA 06/26/2015 Updated MPN versus Features Summary:
Updated details in “CY8CMBR3002” column corresponding to “Sensor
auto-reset” feature.
Updated details in “CY8CMBR3108” column corresponding to “Maximum
number of GPOs/LED drive outputs” feature.
Updated Pinouts:
Recommended “If unused” connection for SPO, GPO and AXRES pins.
Added Unused SPO Pin Connection.
Added Unused SPO Pin Connection for AXRES pins.
Added Unused GPO Pin Connection.
Updated Power Consumption and Operational States:
Removed low power design guidelines from this section, and referred to
CY8CMBR3xxx Design Guide for these guidelines.
Updated I2C Slave Address:
Mentioned default I2C slave address for CY8CMBR3xxx devices.
Provided details on how to configure the 7-bit I2C slave address for CY8CM-
BR3xxx devices.
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *O Page 41 of 42
*M 5041506 PRIA 01/13/2016 Updated Power Supply Information:
Updated description.
Updated Power Consumption and Operational States:
Updated description.
Updated Figure 17.
Updated Ordering Information:
Removed the Note “All package types are available in Tape and Reel.” and its
reference in Ta b l e 22 , rather mentioned the same in description above
Table 22.
No change in part numbers.
Updated Ordering Code Definitions (Added (T) and its details).
Updated Packaging Dimensions:
Updated “8-pin SOIC (150 Mils) Package Outline” to match latest packaging
spec 51-85066 Rev *H.
Updated to new template.
*N 5638290 PRIA 03/16/2017 Removed spec RPU.
Added Flash Specifications.
Updated Figure 16
Add Rpullup in XRES DC Specifications.
Updated the Cypress logo.
*O 6032718 PRIA 01/15/2018 Updated 8-pin SOIC (150 Mils) Package Outline: 51-85066 (*H to *I).
Document History Page (continued)
Document Title: CY8CMBR3002, CY8CMBR3102, CY8CMBR3106S, CY8CMBR3108, CY8CMBR3110, CY8CMBR3116
Datasheet CapSense® Express™ Controllers with SmartSense™ Auto-tuning 16 Buttons, 2 Sliders, Proximity Sensors
Document Number: 001-85330
Revision ECN Orig. of
Change
Submission
Date Description of Change
Document Number: 001-85330 Rev. *O Revised January 15, 2018 Page 42 of 42
CY8CMBR3002, CY8CMBR3102 CY8CM-
BR3106S, CY8CMBR3108 CY8CMBR3110,
CY8CMBR3116 Datasheet
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