2 CY3280-MBR2 CapSense Express with SmartSense Auto-Tuning Kit Guide, Doc. # 001-71857 Rev. *C
Copyrights
Copyrights
© Cypress Semiconductor Corporation, 2012-2013. The information contained herein is subject to change without notice.
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Disclaimer: CYPRESS MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARD TO THIS MATE-
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Use may be limited by and subject to the applicable Cypress software license agreement.
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CY3280-MBR2 CapSense Express with SmartSense Auto-Tuning Kit Guide, Doc. # 001-71857 Rev. *C 3
Contents
1. Introduction 5
1.1 Kit Contents.............. ... ................ .... ... ... ................ ... .... ... ... ................ ... .... ... ...............5
1.2 Factory Default Configuration................ ... .... ... ... ................ ... .... ... ... ... ... .... ... ...............5
1.3 Reference Documents................. .... ... ... ................ ... .... ... ... ................ ... .... ... ... ............5
1.4 Acronyms.....................................................................................................................6
1.5 Document Revision History ........................................................................................6
1.6 Documentation Conventions .......................................................................................6
2. Getting Started 9
2.1 Before you Begin .........................................................................................................9
2.2 Installation Procedure..................................................................................................9
3. Kit Operation 13
3.1 CY8CMBR2110 CapSense Controller Features........................................................14
3.1.1 Configuring CY8CMBR2110 CapSense Controller........................................14
3.2 Kit Features ................. ... .... ... ... ................ .... ... ... ... ... ................. ... ... ... ... .... ................16
3.2.1 SmartSense Auto-Tuning.............. .... ... ... ... ... .... ... ... ................ ... .... ... ... ... .... ...16
3.2.2 Toggle (Touch ON/OFF).................................................................................18
3.2.2.1 Enable Toggle (Touch ON/OFF)......................................................18
3.2.2.2 Test CapSense Buttons with Toggle (Touch ON/OFF) Enabled .....18
3.2.3 Flanking Sensor Suppression (FSS)....................... ... .... ... ... ... ... .... ... ... ... .... ...19
3.2.3.1 Enable Flanking Sensor Suppression....... ... .... ... ... ... ....... ... ... ... .... ...19
3.2.3.2 Test CapSense Buttons with FSS Enabled .....................................19
3.2.4 LED ON Time.................................................................................................20
3.2.4.1 Enable LED ON Time ......................................................................20
3.2.4.2 Test CapSense Buttons with LED ON Time Enabled......................20
3.2.5 Button Auto Reset (ARST).............................................................................21
3.2.5.1 Enable Button Auto Reset...... ... ... ... ................. ... ... ... ... .... ... ... ... .... ...21
3.2.5.2 Test CapSense Buttons with ARST Enabled...... ... ... ... .... ... ... ... .... ...21
3.2.6 Debounce Control ..........................................................................................22
3.2.6.1 Enable Debounce Control...................... ... ... .... ... ... ... ... .... ... ... ... .... ...22
3.2.6.2 Test CapSense Buttons for Debounce Control................................22
3.2.7 Buzzer Signal Output................. ... .... ... ... ... ... .... ... ... ... .... ... ................ ... ... .... ...23
3.2.7.1 Enable Buzzer Signal Output.......... .... ... ... ... .... ... ... ... ... .... ... ... ... .... ...23
3.2.7.2 Test CapSense Buttons for Buzzer Signal Output...........................23
3.2.8 Host Controlled GPOs... ... .... ... ... ... .... ... ... ... ... .... ... ... ................ ... .... ... ... ... .... ...24
3.2.8.1 Drive Host Controlled GPOs............................................................24
3.2.8.2 Test Host Controlled GPO LEDs .....................................................24
3.2.9 Power-On LED Effects...................................................................................25
3.2.9.1 Enable Power-On LED Effects.........................................................25
3.2.9.2 Test CapSense Buttons with Power-On LED Effects Enabled........25
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Contents
3.2.10 Button Controlled LED Effects.......................................................................26
3.2.10.1 Enable Button Controlled LED Effects.............................................26
3.2.10.2 Test CapSense Buttons with Button Controlled LED Effects ..........26
3.2.11 System Diagnostics .......................... ... ... .... ................ ... ... ... .... ................ ... ...27
3.2.11.1 Enable System Diagnostics.............................................................27
3.2.11.2 Test System Diagnostics - CapSense Button Short to Ground.......27
3.2.11.3 Test System Diagnostics - CapSense Button to Button Short.........28
3.2.11.4 Test System Diagnostics - CapSense Button to Vdd Short.............29
4. Hardware 31
4.1 Power Block...............................................................................................................32
4.2 CY8CMBR2110 Functional Block..............................................................................33
4.3 I2C to USB Bridge Block ...........................................................................................33
4.4 Connector Details.................. ... ................. ... ... ... .... ... ................ ... ... .... ... ... ................34
4.4.1 USB-IIC Connector........................................................................................34
4.4.2 Expansion Connector.... .... ... ... ... .... ................................................................34
5. Sample Configurations 35
5.1 Demonstration of Features using Sample Configuration Files..................... ... .... ... ...35
5.1.1 Loading Configuration File 1..........................................................................35
5.1.2 Loading Configuration File 2..........................................................................37
5.1.3 Loading Configuration File 3..........................................................................38
A. Appendix 39
A.1 Schematics................................................................................................................39
A.2 Board Layouts .... ... ... .... ... ... ... ................ .... ... ... ... ................ .... ... ... ................ ... .... ... ...42
A.3 Bill of Materials (BOM)...............................................................................................47
CY3280-MBR2 CapSense Express with SmartSense Auto-Tuning Kit Guide, Doc. # 001-71857 Rev. *C 5
1. Introduction
Thank you for your interest in the CY3280-MBR2 CapSense® Express™ with SmartSense™ Auto-
Tuning Kit. This kit is designed to showcase the abilities of the CY8CMBR2110 register configurable
CapSense controller. The CY8CMBR2110 controller is equipped with SmartSense, which enables
engineers to go from prototyping to mass production without tuning for manufacturing variations in
PCB and overlay mat er ial pr op e rtie s.
This guide provides det ails on the kit con tent s, inst allation pro cedure, hard ware descrip tions, sample
configurations, schematics, and the bill of materials.
The kit package includes the EZ-Click customizer tool, which is required to configure the kit. For
more information and to download the tool, visit http://www.cypress.com/go/ez-click.
1.1 Kit Contents
■CY3280-MBR2 kit
■Two AAA batteries (unassembled)
■Overlay (3-mm thickness)
■A to Mini-B USB cable
■Screw driver
■Five samples of CY8CMBR2110-LQXI
■CY3280-MBR2 kit CD/DVD
■Flex-PCB (with 1- m m ov er lay )
■Quick start gu ide
1.2 Factory Default Configuration
The kit installation folder includes three configuration files that demonstrate several features. The
Sample Configurations chapter on page 35 provides details of these configuration files. When
shipped, the CY3280-MBR2 board is configured with Sample Configuration1 file.
1.3 Reference Documents
The following documents can be used for reference:
■CY8CMBR2110 CapSense Design Guide
■CY8CMBR2110 Datasheet
■EZ-Click Customizer Tool User Guide
■CY3280-BSM
■Getting Started with CapSense Guide
6 CY3280-MBR2 CapSense Express with SmartSense Auto-T uning Kit Guide, Doc. # 001 -71857 Rev. *C
Introduction
1.4 Acronyms
1.5 Document Revision History
1.6 Documentation Conventions
Acronym Definition
BSM Simple Button Module
CSD CapSense Sigma-Delta
ESD Electrostatic Discharge
GUI Graphic User Interface
IIC Inter Integrated Circuit
LED Light Emitting Diode
MBR Mechanical Button Replacement
NC Not Connected
PCB Printed Circuit Board
PC Personal Computer
USB Universal Serial Bus
Table 1-1. Revision History
Revision PDF Cre ation
Date Origin of
Change Description of Cha ng e
** 04/04/2012 ZINE Initial version of kit guide
*A 11/16/2012 ZINE Updated Getting Started chapter on page 9. Updated all images.
*B 03/04/2013 ZINE
Updated Title
Updated all images in Chapter 2
Updated Procedure in Configuring CY8CMBR2110 CapSense Con-
troller on page 14
Updated Configuring CY8CMBR2110 CapSense Controller on
page 14 and Kit Features on page 16
Updated Table 4-1 on page 32
Updated Appendix chapter on page 39
*C 05/22/2013 ZINE Updated Kit Operation chapter on page 13.
Table 1-2. Document Conventions for Guides
Convention Usage
Courier New Displays file locations, user entered text, and source code:
C:\ ...cd\icc\
Italics Displays file names and reference documentation:
Read about the sourcefile.hex file in the PSoC Designer User Guide.
[Bracketed, Bold]Displays keyboard commands in procedures:
[Enter] or [Ctrl] [C]
CY3280-MBR2 CapSense Express with SmartSense Auto-Tuning Kit Guide, Doc. # 001-71857 Rev. *C 7
Introduction
File > Open Represents menu paths:
File > Open > New Project
Bold Displays commands, menu paths, and icon names in procedures:
Click the File icon and then click Open.
Times New Roman Displays an equation:
2 + 2 = 4
Text in gray boxes Describes Cautions or unique functionality of the product.
Table 1-2. Document Conventions for Guides
Convention Usage
8 CY3280-MBR2 CapSense Express with SmartSense Auto-T uning Kit Guide, Doc. # 001 -71857 Rev. *C
Introduction
CY3280-MBR2 CapSense Express with SmartSense Auto-Tuning Kit Guide, Doc. # 001-71857 Rev. *C 9
2. Getting Started
This chapter describes the installation of the CY3280-MBR2 CapSense Express with SmartSense
Auto-Tuning Kit.
2.1 Before you Begin
All Cypress software installations require administrator privileges, but this is not required to run the
installed soft ware.
1. Shut down any Cypress software that is currently running.
2. Disconnect ICE-Cube or MiniProg1 devices from your computer.
2.2 Installation Procedure
Install the EZ-Click customizer tool to load and run the sample configurations onto the board. You
can also build your own configuration file using this tool. Follow these steps to install the CY3280-
MBR2 kit package:
1. Insert the kit CD/DVD into the CD/DVD drive of your PC. The CD/DVD is designed to auto-run
and the kit installer startup screen appears.
Note You can als o do wnloa d the latest kit installer from http://www.cypress.com/go/CY3280-
MBR2. Three different types of installers are available for download.
a. CY3280-MBR2_ISO: This file (ISO image) is an archive file of the optical disc provided with
the kit. You can use this to create an installer CD/DVD or extract information using WinRar or
similar tools.
b. CY3280-MBR2_ Single Package: This e xec utable file installs the content s of the kit CD/DVD,
which includes PSoC Programmer, PSoC Designer , kit code examples, kit hardware files, and
user documents.
c. CY3280-MBR2_Single Package (without prerequisites): This executable file installs only the
kit contents, which includes kit code examples, hardware files, and user documents.
2. Click Install CY3280-MBR2 to start the kit installation, as shown in Figure 2-1.
10 CY3280-MBR2 CapSense Express with SmartSense Auto-T un i n g Kit Guide, Doc. # 001-7185 7 R ev. *C
Getting St arted
Figure 2-1. Kit Installer Startup Screen
Note If auto-run does not execute, double-click cyautorun.exe file on the root directory of the
CD/DVD, as shown in Figure 2-2. To access the root directory, click Start > My Computer >
CY3280-MBR2 <drive: >.
Figure 2-2. Root Directory of CD/DVD
3. On the startup screen, click Next to start the installer.
4. The InstallShield Wizard screen appears. On this screen, choose the folder location to install
the setup files. You can change the folder location for setup files using Change, as shown in
Figure 2-3.
5. Click Next to launch the kit installe r.
CY3280-MBR2 CapSense Express with SmartSense Auto-Tuning Kit Guide, Doc. # 001-71857 Rev. *C 11
Getting Started
Figure 2-3. InstallShield Wizard
6. On the Product Installation Overview screen, select the installation type that best suits your
requireme nt . Th e dr op -d o wn m en u ha s thr e e op tio ns : Typical, Complete, and Custom, as
shown in Figure 2-4. If you are uncertain, proceed with the default setting (Typical).
7. Click Next to start the installation.
Figure 2-4. Installation Type Options
8. When the installation begins, a list of all packages appear on the Installation Page. A green
checkmark appears against every package that is downloaded and installed, as shown in
Figure 2-5.
9. Wait until all the packages are downloaded and installed successfully.
12 CY3280-MBR2 CapSense Express with SmartSense Auto-T un i n g Kit Guide, Doc. # 001-7185 7 R ev. *C
Getting St arted
Figure 2-5. Installation Page
10.Click Finish to complete the installation.
Figure 2-6. Installation Complete
CY3280-MBR2 CapSense Express with SmartSense Auto-Tuning Kit Guide, Doc. # 001-71857 Rev. *C 13
3. Kit Operation
The CY8CMBR2110 CapSense controller support s multiple features. The CY3280-MBR2 CapSense
Express Kit package includes the hardware required to demonstrate these features. This chapter
details these features along with how to use them with the kit.
To start using the kit, open the case using the screw driver and insert the two AAA batteries in the
battery holder. Assemble the case using the screw driver provided with the kit. Touch the power
button first and ensure the power button, LED1, and LED2 light up. Each CapSense button is
mapped to an LED such that activation of a button can be verified by monitoring the LED status. The
ON status of LEDs indicate that th e CapSe n se bu tt on s ar e act ive .
The Flex-PCB with 10 buttons can be connected to the kit via the 44-pin expansion connector (see
Hardware chapter on page 31 for details). Power off the kit before connecting the Flex-PCB. When
the kit is powered, a finger touch on the Flex-PCB buttons lights up the respective LED on the kit.
Figure 3-1. CY8CMBR2110 CapSense Controller Kit with Flex-PCB
14 CY3280-MBR2 CapSense Express with SmartSense Auto-T un i n g Kit Guide, Doc. # 001-7185 7 R ev. *C
Kit Operation
Figure 3-2. Expansion Connector
3.1 CY8CMBR2110 CapSense Controller Features
The CY8CMBR2110 controller has the following features:
■SmartSense Auto-Tuning - Supports auto-tuning
■Toggle (Touch ON/OFF) - Allows mechanical button replacement
■Flanking sensor suppression - Provides discrimination between close ly spaced sen so rs
■LED ON time - Provides better visual feedback based on button press
■Button auto reset - Prevents stuck sensor, caused by placing a metal object close to the sensor
■Debounce control - Prevents false button trigger
■Buzzer signal output - Enables conn ecting the buzzer directly to the device
■Host controlled general-purpose output (GPO) - Enables control by the host (I2C master)
■Power-on LED effects
■Button controlled LED effects
■System diagnostics - supports production testing and debugging
See the CY8CMBR2110 datasheet for more details on these features.
The CY3280-MBR2 CapSense Express Kit can be configured using the EZ-Click customizer tool.
Three configuration file projects are included with the kit. Additional configuratio ns can be generated
using the tool.
3.1.1 Configuring CY8CMBR2110 CapSense Controller
Follow these steps to configure the CY8CMBR2110 controller:
To configure the kit an d test the features supported by it, follow these steps:
1. Connect the CY3280 -MBR2 kit to the PC via the USB port using the USB cable and move the
switch position to GUI. Ensure USB Status LED glows.
2. Open the EZ-Click customizer tool from the default location: Start > All Programs > Cypress >
EZ-Click <version> > EZ-Click.
3. Create a new project in the EZ-Click customizer tool by clicking on New Project under File
menu.
4. In the Main console tab, choose the Cypress device to be CY8CMBR2110.
Pin 1
Pin 2
Pin 15
Pin 16 Pin 13
Pin 14
Pin 9
Pin 10
Pin 5
Pin 6 Pin 3
Pin 4
Pin 7
Pin 8
Pin 11Pin 12
Pin 35
Pin 36 Pin 33
Pin 34 Pin 31
Pin 32 Pin 29
Pin 30 Pin 27
Pin 28 Pin 25
Pin 26 Pin 23
Pin 24 Pin 21
Pin 22 Pin 19
Pin 20 Pin 17
Pin 18
Pin 43
Pin 44 Pin 41
Pin 42 Pin 39Pin 40 Pin 37
Pin 38
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Kit Operation
5. Connect the kit to the EZ-Click tool using the following steps.
a. Click on the Connect button on the Main Console tab of the EZ-Click customizer tool. The
EZ-Click will throw an error as shown. Click OK on the pop-up window. Ensure USB Power
LED glows.
b. Touch the Power button to turn ON the kit. Ensure Power button, LED1, LED2 and Attention
button glows.
c. Click the Connect button on the Main Console tab of the EZ-Click customizer tool. Ensure
you see the device connected in the status window of the Main Console tab.
6. Select the number of buttons as desired. You can select up to 10 buttons for any configuration.
The numbering starts with 0 in the EZ-Click customizer tool and is mapped to button 1 of the kit.
Button 1 in the tool maps to button 2 of the kit and so on.
7. Modify the project to enable features as mentioned in the sections 3.2.2 to 3.2.11.
8. Generate the configuration file by pressing Ctrl + G.
9. Click on Apply Current Config under Configuration menu in the EZ-Click customizer tool.
10.Touch the Power button to turn ON the kit and observe the feature as explai ned in the respective
sections.
Note: A sample EZ-Click configuration file Sample Configuration1 file is pre-loaded into the kit. The
kit will support the features mentioned in 5.1.1 Loading Configuration File 1 on page 35 by default.
To know more about Sample configurations see Sample Configurations on page 35.
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Kit Operation
3.2 Kit Features
The following sections demonstrate each feature of this device.
3.2.1 SmartSense Auto-Tuning
The CY8CMBR2110 CapSense controller is built with a robust CSD capacitive sensin g method a nd
patented SmartSense auto-tuning algorithm. SmartSense Auto-Tuning tunes each sensor
automatically at power up; it then monitors and maintains optimum sensor performance during run
time. This technology adapts for manufacturing variation in PCBs, environmental conditions, and
noise sources such as LCD inverters, AC line noise, and switch-mode power supplies, and
automatically tunes them out.
SmartSense auto-tuning feature does not need to be enabled using EZ-Click and is automatically
enabled on power-up. This feature can be verified on all the buttons, which are enabled. This kit is
pre-loaded with Sample Configuration1, which supports 10 buttons and all 10 buttons demonstrates
SmartSense by default.
This feature is demonstrated as follows.
1. Ensure that the Power select switch is in BAT position. Power the kit by touching the Power but-
ton.
2. Touch any button and ob serve that the respective LED lights up without any manual tuning.
3. Power off the kit. Connect the Flex-PCB and then power the kit. When there is a finger touch on
the Flex-PCB, the respective LED on the kit lights up without any tunin g. The change in sensor
parasitic cap acit ance (Cp) due to the Flex-PCB and the overlay is auto tuned by the Smar tSense
Auto-Tuning algorithm. Hence, no manual tuning is required.
4. Flex-PCB has a 1 mm ove rla y pasted on top of it. You can also use the 3 mm overlay provided
with the kit on top of 1mm overlay in the same way as explained above to verify SmartSense
auto-tunin g fea tu re .
Notes
■Button 2, Left, and Up navigation buttons on the Flex-PCB may not work with 4 mm overlay
(1 mm + 3 mm). The loss of sensitivity of these buttons is due to the overlay thickness and
small size of these button s. To find the req uired button diameter for p articular overlay thinness,
refer to the CY8CM BR2110 Design Toolbox.
■It is recommended not to use the buttons on the main kit while the Flex-PCB is connected to
the kit.
■The exposed Flex-PCB header pins should not be touched while the kit is powered ON.
Touching these pins can act as adding the required finger capacitance. This will lead to false
triggers.
■The Flex-PCB is for demo nst ra tin g Sm ar tSe ns e Aut o- tu ning fe at ur e an d ca nn o t be us ed for
your product design.
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Kit Operation
Figure 3-3. Demonstration of SmartSense Auto-Tuning with Flex-PCB
SmartSense Auto-Tuning algorithm can also be tested on the Simple Button Module (BSM) board.
The BSM board can be connected to the kit and tested for SmartSense Auto-Tuning in the same
way as the Flex-PCB. BSM board is not provided as part of this kit. To purchase or know more about
BSM board, refer to the Cypress website. The Flex-PCB needs to be disconnected from the kit to
test the features mentioned in the subsequent sections.
The following sections demonstrates how to enable and verify various visual and audio features of
the kit. These features require the kit to be configured using the EZ-Click customizer tool.
Follow the steps below to observe the features discussed in sections 3.2.2 to 3.2.10.
a. Create a new project in the EZ-Click customizer tool by following the steps 1-7 in section 3.1.1.
b. Modify the project to enable features explained in the following sections.
18 CY3280-MBR2 CapSense Express with SmartSense Auto-T un i n g Kit Guide, Doc. # 001-7185 7 R ev. *C
Kit Operation
c. Apply the configuration to the kit by following step 7-9.
d. Verify the feature as explained in the sections 3.2.2 to 3.2.10.
Ensure that you have a new project every time you verify a different feature. Enabling two or more
features may or may not work at the same time. Se e the CY8CMBR2110 datasheet to know about
the features , which wi ll no t wo rk to ge th er.
3.2.2 Toggle (Touch ON/OFF)
3.2.2.1 Enable Toggle (Touch ON/OFF)
Go to the Device Config tab; select the Toggle (Touch ON/OFF) checkbox to enable th e toggle fea-
ture for the desired number of buttons. The Figure 3-4 shows to gg le fe at ur e en ab le d in fou r butt on s.
Figure 3-4. Toggle (Touch ON/OFF) Feature GUI
3.2.2.2 Test CapSense Buttons with Toggle (Touch ON/OFF) Enabled
1. To uch a CapSense bu tto n for wh ich th e Togg le (Tou c h ON/O F F) fea tu re is enable d; the respec-
tive LED turns on.
2. Touch the same button again; the LED turns off.
3. On the next touch, the LED goes on again.
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Kit Operation
Figure 3-5. Toggle (Touch ON/OFF) Enabled
3.2.3 Flanking Sensor Suppression (FSS)
3.2.3.1 Enable Flanking Sensor Suppression
Go to the Device Config tab; select the Flanking Sensor Suppression checkbox to enable the
FSS feature for the desired number of buttons.
Figure 3-6. FSS Enabled
3.2.3.2 Test CapSense Buttons with FSS Enabled
1. Touch a FSS-enabled CapSense button; the respective LED turns on.
2. Without removing the touch, touch another FSS-enabled button; the LED does not glow for th e
second button.
3. Remove the touch from the first button. Now , touch any other FSS-enabled button; the respective
LED glows.
Button LED glows on touch
Button is “on” even after
Button goes “off“ on second touch
touch is removed
20 CY3280-MBR2 CapSense Express with SmartSense Auto-T un i n g Kit Guide, Doc. # 001-7185 7 R ev. *C
Kit Operation
Figure 3-7. FSS Enabled
3.2.4 LED ON Time
3.2.4.1 Enable LED ON Time
Go to the Visual Config tab; select the LED ON time checkbox to enable this feature. This is a
global setting app licable for all CapSense button s. To set the time, configur e the LED ON time menu
below the checkbox.
Figure 3-8. LED ON Time Enabled
3.2.4.2 Test CapSense Buttons with LED ON Time Enabled
Touch any CapSense button; the respective LED turns on. When the finger is released, the LED
turns of f after the duration specified in LED on time (msec) in the Visual Config tab.
Button LED glows on touch Second button glows after the
the touch on the firs t button
Second button does not glow if
is continued
finger from the first touched
button is removed
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Kit Operation
Figure 3-9. LED ON Time Enabled
3.2.5 Button Auto Reset (ARST)
3.2.5.1 Enable Button Auto Reset
Go to the Device Config tab; select the Auto reset period menu to enable this feature. The reset
time can be set as either 5 or 20 seconds.
Figure 3-10. ARST Enabled
3.2.5.2 Test CapSense Buttons with ARST Enabled
Touch any CapSense button; the respective LED turns on. Do not release the button; keep the finger
pressed fo r 5 seconds or 20 seconds, a s selected. Notice that the LED turns off automatically after
5 seconds or 20 seconds according to the setting applied. Release the buttons and touch the same
buttons again , it works as usual.
Button LED glows on touch Button is “on” even after
touch is removed Button goes “off” after the
LED On time
22 CY3280-MBR2 CapSense Express with SmartSense Auto-T un i n g Kit Guide, Doc. # 001-7185 7 R ev. *C
Kit Operation
Figure 3-11. ARST Enabled
3.2.6 Debounce Control
3.2.6.1 Enable Debounce Control
Go to the Device Config tab; enter the required debounce number in the Debounce menu. Enter a
value from 1 to 255 in the option available for CS0 and CS1-CS9.
Figure 3-12. Setting Debounce Parameter
3.2.6.2 Test CapSense Buttons for Debounce Control
This parame ter determines the minimum duration for which the finger must be present on the button
to report a "Sensor On".
For example, put 55 in the debounce parameter for CS1-CS9. To calculate the time in milliseconds,
the factor 35 should be multiplied with the debounce parameter value. This factor value is only for
default settings. For other settings, see the CY8CMBR2110 datasheet. In this case, any CapSense
button should be touched more than (35 × 55) = 1925 ms to turn it on.
Button LED glows on touch Button goes off when continuously
touched for more than the ARST
CY3280-MBR2 CapSense Express with SmartSense Auto-Tuning Kit Guide, Doc. # 001-71857 Rev. *C 23
Kit Operation
Figure 3-13. Debounce Enabled
3.2.7 Buzzer Signal Output
3.2.7.1 Enable Buzzer Signal Output
Go to the Device Config tab; enable the feature by selecting the Buzzer checkbox in the Buzzer
Configuration section of the page. Set the frequency, number of pins, type (AC buzzer-1 pin or AC
buzzer-2 pin ), and output duration timing using the respective menu options. Buzzer idle state indi-
cates the state of the buzzer pins when buzzer is not ON. You can configure your buzzer to be in
sinking or sourcing m ode by selec tin g HIG H or LO W re sp ect ive ly as your Buz ze r Idle state.
Figure 3-14. Buzzer Signal Output Ena bled
3.2.7.2 Test CapSense Buttons for Buzzer Signal Output
The button touch gives an audio feedback. The characteristics of the buzzer sound, such as fre-
quency and duration can be observed according to the settings.
Button does not glow if pressed for less than the time set in the Deboun ce parameter settings
24 CY3280-MBR2 CapSense Express with SmartSense Auto-T un i n g Kit Guide, Doc. # 001-7185 7 R ev. *C
Kit Operation
3.2.8 Host Controlled GPOs
3.2.8.1 Drive Host Controlled GPOs
Go to the Device Config t ab; dr ive host controlled GPOs, HCG1 and HCG2, by selecting the Low or
High options in the drop-down. Th e kit does not have any LEDs mapped to HCG3 and HCG4. These
GPOs use the same pins as the buzzer output.
By default, the LEDs light up after the device is powered.
Note HCG3 and HCG4 are not available when the AC buzzer-2 pin is enabled. When the AC
buzzer-1 pin is enab l ed , HCG 4 is disa ble d .
Figure 3-15. Host Controlled GPOs GUI
3.2.8.2 Test Host Controlled GPO LEDs
Drive the HCG1 and HCG2 to Low in the EZ-Click tool to see the respective LEDs light up. Driving
the HCGs High will turn off the LEDs.
Figure 3-16. Host Controlled GPO LEDs
CY3280-MBR2 CapSense Express with SmartSense Auto-Tuning Kit Guide, Doc. # 001-71857 Rev. *C 25
Kit Operation
3.2.9 Power-On LED Effects
3.2.9.1 Enable Power-On LED Effects
Go to the Visual Config tab; select the At Power On checkbox under LED Effects to enable the
feature. Select the values for different parameters such as ramp up time, ramp down time, high time,
low time, high brightness, low brightness, and LED effect repeat rate in the At Power On tab .
Figure 3-17. Power-On LED Effects Enabled
3.2.9.2 Test CapSense Buttons with Power-On LED Effects Enabled
Observe the LED effects according to the configured setting at ever y power cycle.
Figure 3-18. Power-On LED Effect Pattern
26 CY3280-MBR2 CapSense Express with SmartSense Auto-T un i n g Kit Guide, Doc. # 001-7185 7 R ev. *C
Kit Operation
TRU - Ramp up time
TH - High brightness time
TRD - Ramp down time
TL - Low brightness time
3.2.10 Button Controlled LED Effects
3.2.10.1 Enable Button Controlled LED Effects
Go to the Vis ual Con fig tab; se lect th e On Button Touch checkbox under LED Effects to enable
the featur e. Select the va lues for different paramet ers such as ra mp up time, ramp down tim e, high
time, low time, h igh bright ness, low brig htness, and LED effect repeat rate in the On Button Touch
tab.
Figure 3-19. Button Controlled LED Effects Enabled
3.2.10.2 Test CapSense Buttons with Button Controlled LED Effects
On every butt on to uch, the re spec tive LED effects can be observed ac cording to the conf igure d set -
ting.
CY3280-MBR2 CapSense Express with SmartSense Auto-Tuning Kit Guide, Doc. # 001-71857 Rev. *C 27
Kit Operation
Figure 3-20. Button Controlled LED Effects Pattern
3.2.11 System Diagnostics
3.2.11.1 Enable System Diagnostics
The System Diagnostics feature is enabled in the CY8CMBR2110 CapSense controller by default;
no change is nee ded in the kit. T his featu re sends ou t a 5-ms p ulse on the GP O corres pondin g to a
faulty sensor. The GPO pins are connected via the 44-pin expansion connector, which can be
probed to observe the 5-ms pulse. See Connector Details on page 34 for details of the expansion
connector and to know the pin associated with each button and GPO. The pin number can be
counted starting from the lower pin on the USB connector side, as shown in the following figures.
Note that all odd numbered pins are at the bottom half of the connector.
The system diagnostics feature can also be observed in the EZ-Click Customizer Tool.
3.2.11.2 Test System Diagnostics - CapSense Button Short to Ground
Follow these steps:
1. Touch the power button to turn off the kit.
2. Connect a wire between pin #3 and pin #5 of 44-pin expansion connector. This short s the button
#5 sensor to ground.
3. Touch the power button to turn on the kit.
The CapSense controller executes the System Diagnostics routine on power up and detects the sen-
sor shorted to grou nd. Obse rve a pulse of 5 ms wid th o n the GPO #5 pin, which is also visib le on the
corresponding LED. This indicates that button #5 is shorted to ground. The CapSense controller dis-
ables the button se nsors that are shor ted to grou nd. Touch button #5 and see that the corresponding
LED is not turned on. Other buttons work normally.
Figure 3-21. Shorting Button #5 (pin #3) to Ground (pin #5)
28 CY3280-MBR2 CapSense Express with SmartSense Auto-T un i n g Kit Guide, Doc. # 001-7185 7 R ev. *C
Kit Operation
To observe the feature in GUI, go to Production line testing tab and click on the Start test button.
Figure 3-22. System Diagnostics GUI - Shorting Button to Ground
3.2.11.3 Test System Diagnostics - CapSense Button to Button Short
Follow these steps:
1. Touch the power button to turn off the kit.
2. Connect a wire between pin #3 and pin #9 of the 44-pin expansion connector. This shorts button
#5 and button #2 sensors.
3. Touch the power button to turn on the kit.
Note: The button numbering in the Production Testing tab in the EZ-Click customizer tool starts with
0, which is linked to button 1 of the kit. Similarly, button 1 in the tab is mapped to button 2 of kit and
so on.
The CapSense controller executes the System Diagnostics routine on power up and detects the sen-
sor to sensor short. Observe a pulse of 5 ms width on the GPO #5 and GP0 #2 pins, which is also
visible on the corresponding LEDs. This indicates that button #5 is shorted to button #2. The
CapSense controller disables the butt on sensors that are shorted to each other . Touch button #5 and
button #2; not e tha t th e re sp ec tive LEDs ar e no t tur n ed on.
Other buttons work normally.
Figure 3-23. Shorting Button #5 (pin #3) to Button #2 (pin #9)
To observe the feature in GUI, go to Production line testing tab and click on the Start test button.
CY3280-MBR2 CapSense Express with SmartSense Auto-Tuning Kit Guide, Doc. # 001-71857 Rev. *C 29
Kit Operation
Figure 3-24. System Diagnostics GUI - Shorting Button to Button
3.2.11.4 Test System Diagnostics - CapSense Button to Vdd Short
Follow these steps:
1. Touch the power button to turn off the kit.
2. Connect a wire between pin #27 and pin #41 of the 44-pin expansion connector. This shorts but-
ton #6 sensor with Vdd.
3. Touch the power button to turn on the kit.
The CapSense controller executes the System Diagnostics routine on power up and detects the sen-
sor to Vdd short. Observe a pulse of 5 ms width on the GPO #6 pin, which is also visible on the cor-
responding LED. This indicates that button #6 is shorted to Vdd. The CapSense controller disables
the button sensors that are shorted to ground. Touch button #6; note that the corresponding LED is
not turned on.
Other buttons work normally.
Figure 3-25. Shorting Button #6 (pin #27) to Vdd (pin #41)
To observe the feature in GUI, go to Production line testing tab and click on the Start test button.
30 CY3280-MBR2 CapSense Express with SmartSense Auto-T un i n g Kit Guide, Doc. # 001-7185 7 R ev. *C
Kit Operation
Figure 3-26. System Diagnostics GUI - Shorting Button to Vdd
CY3280-MBR2 CapSense Express with SmartSense Auto-Tuning Kit Guide, Doc. # 001-71857 Rev. *C 31
4. Hardware
The CY3280-MBR2 CapSense Express Kit is designed to demonstrate the features of the
CY8CMBR2110 register configurable CapSense controller. Figure 3-1 on page 13 illustrates ten
CapSense buttons and CapSense-based power and attention buttons. Th e kit has two s tatus LEDs
to demonstrate the direct LED control feature. The CY8CMBR2110 controller supports multiple
features, which are discussed in the Kit Operation chapter on page 13.
The CY3280-MBR2 kit has two connectors: a 44-pin expansion connector and a USB-IIC connector.
The expan sion connector is use d to demonstrate the SmartSense Auto-Tuning feature. The USB-IIC
connector helps to power and configure the kit using the GUI.
Figure 4-1. CY3280-MBR2 Kit
32 CY3280-MBR2 CapSense Express with SmartSense Auto-T un i n g Kit Guide, Doc. # 001-7185 7 R ev. *C
Hardware
Figure 4-2 shows the block diagram of the CY3280-MBR kit. The block diagram can be classified
into four sections: Power, CY8CMBR2110 functional blocks, I2C to USB, and Connectors (USB-IIC
and 44-pin expansion connector). Each section is explained in detail here.
Figure 4-2. Block Diagram
4.1 Power Block
This block consists of the power source, series pass switch, power LED, and the CY8CMBR2044
CapSense controller. The kit supports three powe r sources.
Table 4-1. Power Source
The series pass switch, which is controlled by the CY8CMBR2044 CapSense controller is responsi-
ble for the power supplied to the CY8CMBR2110 functional block. To power the kit, at least one of
the above sources should be active. Touch the CapSense-based Power button to see the LED glow-
ing and ensure that the kit is powered.
The kit has various protection circuits driven by the CY8CMBR2044 chip:
■A fuse is present in the power block to limit the external consumption to 200 mA.
■A diode is present at VDD-Ext to limit the input voltage to 6 V.
■ESD protection is enabled for USB lines.
No. Power Source Voltage Levels
(Volts) Power Select Switch
Position
1AAA batteries provided with the kita
a. An estimated battery life of ~40hrs can be achieved on an AAA pack when all blocks are turned on. An estimated battery life of one year
can be achieved on an AAA pack when the unit is in standby/sleep.
3.0 BAT
2GUI when connected to PC via USB-IIC conne ctorb
b. GUI has four power options - 1.8 V, 2.5 V, 3.3 V, and 5 V; however, it only support s 3.3 V for this kit. The USB status LED gl ows when t he
kit is connected to PC. USB power LED indicat es that the kit is powered through USB.
3.3 GUI
3External sourcec
c. To power the kit in this mode change the switch position to EXT and conn ect the external vo ltage source and ground to the VDD_EXT (pin
43) and GND (pin 40) pins respectively of the 44-pin connector.
3.0 EXT
CY8CMBR2110
CapSense
Controller
Ten
CapSense
Buttons
TenOutput
LEDs
Buzzer
Output
TwoHost
Controlled
LEDs
Expansion
Connector
Flex‐PCB/BSM
Board
CY8C24894
CapSense
Controller
USB‐I2C/J3
Connector
GUI
Seriespass
Controlled
Switch
CY8CMBR2044
CapSense
Controller
Power/Wake
LEDs
Power
Select
switch
AAA
Batteries
External
Source
GUI
I2C
Vdd
Powerand
StatusLEDs
CY3280-MBR2 CapSense Express with SmartSense Auto-Tuning Kit Guide, Doc. # 001-71857 Rev. *C 33
Hardware
Figure 4-3. Power Supply System Structure Schematic
4.2 CY8CMBR2110 Functional Block
This block demonstrates the features mentioned in 3.2 Kit Features on page 16. It consists of:
■CY8CMBR2110 CapSense controller
■10 CapSense buttons as input
■10 output LEDs tha t ar e dir ectly mapped to CapSense buttons
■A single line buzzer for audio output
■Two host-controlled configurable LEDs
■22×2 connector to bring out all I/Os and power line of the CY8CMBR2110 chip
■Flex-PCB/BSM board, which can be connected via the 44-pin expansion connector and demon-
strates the SmartSense Auto-Tuning feature of the device
4.3 I2C to USB Bridge Blo ck
This block functions as a bridge between the USB (PC) and I2C communication on the
CY8CMBR2110 chip. The kit can be configured using this bridge with the help of the GUI. To config-
ure the kit, either use the sample configuration files provided with the kit package or use the GUI via
the USB-IIC bridge. In addition to the I2C to USB protocol conversion, the block also controls power
to the CY8CMBR2110 chip via the GUI a nd U S B. The block consists of the CY8C24894 chip, which
is responsible for the USB-IIC protocol conversion and power contr ol.
+
-
+
-
Capsense(CY8CMBR2044) Based Power Button and I2C Attn. control section
TWO AAA 1.5V 1280mAh Battery
Test Points
DNP
Series Pass Switch
PWR_BTN
PWR_BTN
PWR_ON
PWR_ON_INV
PWR_ON
PWR_ON_INV
Wake_BTN
Wake Wake_BTN
VDD_Ext
VDD_SW
VIN
VIN
VIN
VDD_SW VDD_Dev
VDD_SWVDD_DevVIN
VIN
VIN VIN
VDD_USB
VDD_BATVDD_ExtVDD_USB
VIN
VDD_SW
VIN
VDD_BAT
Wake
0805
C5
2200 pFd
J2
Battery Clip AAA
1
2
3
4
J1
Battery Clip AAA
1
2
3
4
0805
R2 Zero E
12
SOD123
D1 MBR0520L
21
0805
R8
665 E
12
GND
C6
0.1uf
U3
CY8CMBR2044
SCANRATE/SLEEP 12
VSS
7
ARST 9
XRES 11
GPO0
2
TOGGLE/FSS
3
GPO3 14
GPO1
1
CS0
5
CS3 10
CS1
6
CS2
8VDD 13
GPO2 16
CMOD 15
DELAY
4
U2
SN74LVC1GU04
NC
1
A
2
GND
3
VCC 5
Y4
Sensor
ATTN
CapSense Button 8mm Round
1
VDD_USB
0805
R1
665 E
12
0603
R7
5.1K
12
0402
R10
560E
1206R
D3
LED Red
21
0603
R6
5.1K
1 2
VDD_Dev
VDD_SW
0805
R3 Zero E
12
VDD_BAT
Sensor
POWER
CapSense Button 8mm Round
1
C2
0.1uf
1206
C3
10 uFd 16v
VIN VDD_Ext
1206R
D2
LED Red
21
0603
C1
0.1 uFd
0603
R5
5.1K
12
1206
C4
10 uFd 16v
SW1
SP4T
64
5
2
3 1
VOUT
GND
NCEN
GND1
VIN
U1
MIC94090 SC-70-6
5
1
2
6 3
4
0603
R4
5.1K
12
0402
R9
560E
34 CY3280-MBR2 CapSense Express with SmartSense Auto-T un i n g Kit Guide, Doc. # 001-7185 7 R ev. *C
Hardware
4.4 Connector Details
4.4.1 USB-IIC Connector
This kit is configurable through the IIC interface. The USB-IIC con nector enables the kit to connect to
the PC via the USB cable provided with the kit. This connector serves two main purposes:
■Enables powering the kit from the GUI
■Enables configuring the kit by connecting to the GUI via the USB-IIC header
4.4.2 Expansion Connector
Table 4-2 shows various signals connected to the 44-pin expansion connector. The CS inputs (CS0-
CS9) and GPOs linked to each CapSense button are brought to the 44-pin expansion connector.
This is used to verify SmartSense Auto-Tuning by connecting the Flex-PCB, BSM, or any other con-
necting board. The kit can be powered from an external power supply using the VDD and GND sig-
nals available in the connector. The kit also has output lines for host control and buzzer. The IIC
clock and data lines from the CY8CMBR2110 chip are also brought to this connector.
Note: There are two pins assigned to each of GPO3 and GPO5. This is done to make expansion
connector compatible to CY3280 Universal CapSense Module Boards.
Table 4-2. 44-Pin Expansion Connector
Pin Connected to Pin Connected to
P1-1 CS8 P1-23 Wake
P1-2 GPO8 P1-24 GPO 1
P1-3 CS5 P1-25 GND
P1-4 XRES P1-26 GND
P1-5 GPO5 P1-27 CS6
P1-6 GND P1-28 GPO6
P1-7 GPO5 P1-29 GPO3
P1-8 GPO2 P1-30 CS3
P1-9 CS2 P1-31 GPO3
P1-10 CS9 P1-32 NC
P1-11 GPO9 P1-33 CS0
P1-12 GPO7 P1-34 GND
P1-13 CS7 P1-35 GND
P1-14 CS4 P1-36 GND
P1-15 GND P1-37 I2C SDA
P1-16 GND P1-38 I2C SCL
P1-17 CS1 P1-39 GND
P1-18 Host Cntl 0 P1-40 GND
P1-19 Host Cntl 1 P1-41 VDD Dev
P1-20 GPO4 P1-42 NC
P1-21 Buzzer Out 0 P1-43 VDD Ext
P1-22 Buzzer Out 1 P1-44 NC
CY3280-MBR2 CapSense Express with SmartSense Auto-Tuning Kit Guide, Doc. # 001-71857 Rev. *C 35
5. Sample Configurations
This section discusses the high-level design process to open, build, configure, and run sample con-
figurations using the CY3280-MBR2 CapSense Express Kit.
There are three Sample configurations provided with this kit. Each sample configuration file has dif-
ferent con figuration settings demonstra ting vario us kit features. By default, the kit is configured with
Sample Configuration 1.
To use the Sample Configuration files, EZ-Click customizer tool is required. The installation details
for EZ-Click customizer tool is explained in Getting Started chapter on page 9.
5.1 Demonstration of Features using Sample Configuration Files
Follow the steps to run the configuration files and test the features.
5.1.1 Loading Configuration File 1
1. Connect the CY3280-MBR2 kit to the PC via the USB port using the USB cable and move the
switch position to GUI. Ensure USB Status LED glows.
2. Open the EZ-Click customizer tool from the default location: Start > All Programs > Cypress >
EZ-Click <version> > EZ-Click.
3. Click on Load Proj ec t under File menu. Figure 5-1 shows the default location of Load Project
action.
Figure 5-1. Load Project
36 CY3280-MBR2 CapSense Express with SmartSense Auto-T un i n g Kit Guide, Doc. # 001-7185 7 R ev. *C
Sample Configurations
4. Navigate to the proje ct dir ec to ry <Install_Directory>:\Program Files\Cypress\
CY3280-MBR2\<version>\Sample Configurations\Sample Configuration 1 in the
Open Project - Select Project Location window.
5. Double-click on the Sample Configuration 1 file to open.
Figure 5-2. Open Configuration1 File
6. Connect the kit to the EZ-Click tool using the following steps.
a. Click on the Connect button on the Main Console tab of the EZ-Click customizer tool. The
EZ-Click will throw an error as shown. Click OK on the pop-up window. Ensure USB Power
LED glows.
CY3280-MBR2 CapSense Express with SmartSense Auto-Tuning Kit Guide, Doc. # 001-71857 Rev. *C 37
Sample Configurations
b. Touch the Power button to turn ON the kit. Ensure Power button, LED1, LED2 and Attention
button glows.
c. Click the Connect button on the Main Console tab of the EZ-Click customizer tool. Ensure
you see the device connected in the status window of the Main Console tab.
7. Click on Apply Current Config under Configuration menu to apply th e configuration to the kit.
Figure 5-3. Apply Current Configuration
8. Touch the Power button to power the kit.
9. Verify the following features:
❐LED ON time (1.5 sec): Touch any CapSense button; the re spective LED turn s on. When the
finger is released, the LED turns off after 1.5 seconds.
❐Button auto rese t (5 sec): Touch any CapSense button; the respective LED turns o n. Do not
release the finger; the button will go off automatically after 5 seconds.
❐Automatic threshold: This feature automatically keep s an optimum finger threshold value for
all the buttons.
5.1.2 Loading Configuration File 2
The GUI images for the following steps are similar to 5.1.1 Loading Configuration File 1 on page 35:
1. Steps 1 to 3 remains the same as mentioned 5.1.1.
2. Navigate to the proje ct dir ec to ry <Install_Directory>:\Program Files\Cypress\
CY3280-MBR2\<version>\Sample Configurations\Sample Configuration 2 in the
Open Project - Select Project Lo cation window.
3. Double-click on the Sample Configuration 2 file to open.
4. Follow the steps 4 to 6 mentioned in section 5.1.1 to continue.
5. Verify the following features:
❐Buzzer: Touch any button; the respective LED turns ON along with an audio feedback.
❐Power-on LED effects: Observe LED effects on all the buttons upon power up.
❐Button controlled LED effects: Observe LED effects on touching any CapSense button.
❐Automatic threshold: This feature automatically keep s an optimum finger threshold value for
all the buttons.
❐Debounce control on Button 1: Observe that button 1 is activated only after you touch the
button for approximately 1 second.
38 CY3280-MBR2 CapSense Express with SmartSense Auto-T un i n g Kit Guide, Doc. # 001-7185 7 R ev. *C
Sample Configurations
5.1.3 Loading Configuration File 3
The GUI images for the following steps are similar to 5.1.1 Loading Configuration File 1 on page 35:
1. Steps 1 to 3 remains the same as mentioned 5.1.1.
2. Navigate to the proje ct dir ec to ry <Install_Directory>:\Program Files\Cypress\
CY3280-MBR2\<version>\Sample Configurations\Sample Configuration 3 in the
Open Project - Select Project Location window.
3. Double-click on the Sample Configuration 3 file to open.
4. Follow the steps 4 to 6 mentioned in section 5.1.1 to continue.
5. Verify the following feat ur es :
❐Button auto rese t (5 sec): Touch any CapSense button; the respective LED turns o n. Do not
release the finger; the button will go off automatically after 5 seconds.
❐Power-on LED effects: Observe LED effects on all the buttons upon power up.
❐Toggle + Button controlled LED effects: Touch any of the buttons 1, 2, 3, 4, 5, 6; the corre-
sponding LED lights up showing a ramp in LED brightness. The button will remain lit till the
next touch. The LED brightness ramps down to 0 on the second touch.
❐FSS + Button LED effect s: Touch any of the buttons 7, 8, 9, 10; the corresponding LED lights
up showing LED effects. Keep the finger on the button and touch any of these buttons; the
second button does not glow. Remove the finger from the first button and then touch any of
these button; the button glows displaying LED effects.
Note: You can use Sam ple configuratio ns 1 and 2 with the Flex-PCB in the same way as explained
in the SmartSense auto-tuning feature in Kit Operation chapter on page 13. It is not recommended to
use Sample conf igu ra tio n 3 fo r Fle x-PCB.
CY3280-MBR2 CapSense Express with SmartSense Auto-Tuning Kit Guide, Doc. # 001-71857 Rev. *C 39
A. Appendix
A.1 Schematics
A.1.1 CY3280-MBR2 Board
+
-
+
-
Capsense(CY8CMBR2044) Based Power Button and I2C Attn. control section
TWO AAA 1.5V 1280mAh Battery
Test Points
DNP
Series Pass Switch
PWR_BTN
PWR_BTN
PWR_ON
PWR_ON_INV
PWR_ON
PWR_ON_INV
Wake_BTN
Wake Wake_BTN
VDD_Ext
VDD_SW
VIN
VIN
VIN
VDD_SW VDD_Dev
VDD_SWVDD_DevVIN
VIN
VIN VIN
VDD_USB
VDD_BATVDD_ExtVDD_USB
VIN
VDD_SW
VIN
VDD_BAT
Wake
0805
C5
2200 pFd
J2
Battery Clip AAA
1
2
3
4
J1
Battery Clip AAA
1
2
3
4
0805
R2 Zero E
12
SOD123
D1 MBR0520L
21
0805
R8
665 E
12
GND
C6
0.1uf
U3
CY8CMBR2044
SCANRATE/SLEEP 12
VSS
7
ARST 9
XRES 11
GPO0
2
TOGGLE/FSS
3
GPO3 14
GPO1
1
CS0
5
CS3 10
CS1
6
CS2
8VDD 13
GPO2 16
CMOD 15
DELAY
4
U2
SN74LVC1GU04
NC
1
A
2
GND
3
VCC 5
Y4
Sensor
ATTN
CapSense Button 8mm Round
1
VDD_USB
0805
R1
665 E
12
0603
R7
5.1K
12
0402
R10
560E
1206R
D3
LED Red
21
0603
R6
5.1K
1 2
VDD_Dev
VDD_SW
0805
R3 Zero E
12
VDD_BAT
Sensor
POWER
CapSense Button 8mm Round
1
C2
0.1uf
1206
C3
10 uFd 16v
VIN VDD_Ext
1206R
D2
LED Red
21
0603
C1
0.1 uFd
0603
R5
5.1K
12
1206
C4
10 uFd 16v
SW1
SP4T
64
5
2
3 1
VOUT
GND
NCEN
GND1
VIN
U1
MIC94090 SC-70-6
5
1
2
6 3
4
0603
R4
5.1K
12
0402
R9
560E
ISSP
VOLTCNT
VOLTCNT
VSENSE
D-
D+
D-
D+
VSENSE
ENABLE
ENABLE
VBUS
VBUS
VDD_DevVBUS
VBUS
VDD_USB VBUSVDD_Dev
VBUS
VDD_Dev
VBUS I2CSCL
I2CSDA
Wake
R11
52.3K
0805
R26 22E
12
R22 47E
1206R
D6
LED Red
21
1206R
D7
LED Red
21
0402
C11
0.01 uFd
1 2
0805
R25 22E
12
R13
51K
U6
SN65220-Q1
NC0 1
GND0 2
NC1 3
D-
4
GND1
5
D+
6
0805
C8
1.0 uFd
12
J3
USB MINI B
VBUS 1
DM 2
DP 3
GND 5
ID 4
S1 6
S2 7
S3
8
S4
9
R17
30.1K
R21
7.5K
C7
0.1uf
0805
R27
665 E
12
U4A
TPS73701DCQ
OUT 2
IN
1
FB/NC 4
EN
5
GND1
6GND0 3
U5
CY8C24894
P2[3]
1
P2[1]
2
P4[7]
3
P4[5]
4
P4[3]
5
P4[1]
6
P3[7]
7
P3[5]
8
P3[3]
9
P3[1]
10
P5[7]
11
P5[5]
12
P5[3]
13
P5[1]
14
P1[7]
15
P1[5]
16
P1[3]
17
P1[1]
18
Vss
19
D+
20
D-
21
Vdd
22
P7[7]
23
P7[0]
24
P1[0]
25
P1[2]
26
P1[4]
27
P1[6]
28
P5[0] 29
P5[2] 30
P5[4] 31
P5[6] 32
P3[0] 33
P3[2] 34
P3[4] 35
XRES 36
P4[0] 37
P4[2] 38
P4[4] 39
P4[6] 40
P2[0] 41
P2[2] 42
P2[4] 43
P2[6] 44
P0[0] 45
P0[2] 46
P0[4] 47
P0[6] 48
Vdd 49
Vss 50
P0[7] 51
P0[5] 52
P0[3] 53
P0[1] 54
P2[7] 55
P2[5] 56
57 57
0805
C9
2.2 uFd
12
R18
6.8K
R15 24K
F1 MICROSMD110FTR
R23 47E
R28 100K
0402
C10
10 nFd
12
R14
51K
R12
5.1K
R19
7.5K
R16
10K
D5
5.6V
D4
5.6V
TVS4
5V 350W
12
J4
HDR 1x5
11
33
22
44
55
0805
R20
665 E
12
R24 47E
40 CY3280-MBR2 CapSense Express with SmartSense Auto-T un i n g Kit Guide, Doc. # 001-7185 7 R ev. *C
Backlight LEDs
Buzzer
CMT-1603
4kHz Sq. In
Place near U7
GPO4
CS7
GPO5
BuzzerOut0
GPO6
GPO7
CS0
GPO8
GPO9
CS1
CS2
CS3
CS4
CS5
GPO0
GPO1
GPO2
GPO3
GPO4
Host Cntl 0
Host Cntl 1
GPO5
CS6
CS7
GPO6
GPO7
GPO8
GPO9
CS8
CS9
GPO0
GPO1
GPO2
GPO3
CMOD
Host Cntl 0
Host Cntl 1
CS0
CS6
CS1
CS7
CS2
CS5
CS8
CS3
CS4
CS9
XRES
CMOD
BuzzerOut0
I2CSDA I2CSCL
Host Cntl 1
BuzzerOut0
Wake
BuzzerOut1
Host Cntl 0
XRES
BuzzerOut1
CS8
CS9
CS1
CS0
CS2
CS3
CS4
CS5
CS6
GPO0
GPO3
GPO9
GPO5
GPO8
GPO2
GPO7
GPO4
GPO1
GPO6
VDD_Dev
VDD_Dev
VDD_Dev
VDD_Dev VDD_Ext
VDD_Ext
I2CSCL
I2CSDA
Wake
0402
R34
560E
0805
R550 E
12
0805
R530 E
12
U7
CY8CMBR2110
CS1
1
CS0
2
GPO0
3
GPO1
4
GPO2
5
GPO3
6
GPO4
7
I2CSCL
8
I2CSDA
9
BuzzerOut0
10
HostCntl GPO0
11
Vss1
12
HostCntl GPO1
13
BuzzerOut1
14
Attn/Sleep
15
GPO5
16
XRES 17
GPO6 18
GPO7 19
GPO8 20
GPO9 21
CS9 22
CS8 23
CS7 24
CS5 26
CS4 27
Vdd 28
CS3 29
CS2 30
CMOD 31
Vss0 32
CS6 25
ePad 33
1206R
D10
LED Red
21
Sensor
B9
CapSense Button 8mm Round
1
0402
R42
560E
0805 R50
665 E
12
Sensor
B6
CapSense Button 8mm Round
1
1206R
D11
LED Red
21
P1
22x2_RA_Recptacle
1
122
3
344
5
566
7
788
9
910 10
11
11 12 12
13
13 14 14
15
15 16 16
17
17 18 18
19
19 20 20
21
21 23
23 25
25 27
27 29
29 31
31 33
33 35
35 37
37 39
39
22 22
24 24
26 26
28 28
30 30
32 32
34 34
36 36
38 38
40 40
41
41 42 42
43
43 44 44
Sensor
B2
CapSense Button 8mm Round
1
1206R
D9
LED Red
21
0402
R35
560E
1206R
D19
LED Red
21
1206R
D12
LED Red
21
0805 R47
665 E
12
1206R
D18
LED Red
21
1206R
D13
LED Red
21
0805
R60 0 E
1 2
0805 R45
665 E
12
Sensor
B8
CapSense Button 8mm Round
1
0805 R38
665 E
12
0805
R51 Zero E
12
Sensor
B0
CapSense Button 8mm Round
1
1206R
D8
LED Red
21
0402
R40
560E
LS1
12
Sensor
B1
CapSense Button 8mm Round
1
C12
0.1uf
0402
R44
560E
0805
R61 0 E
1 2
Sensor
B5
CapSense Button 8mm Round
1
1206R
D14
LED Red
21
0805 R31
665 E
12
0402
R36
560E
0805
R560 E
12
0805 R32
665 E
12
0805
R62 0 E
1 2
Sensor
B3
CapSense Button 8mm Round
1
F2
.20A FUSE
1206R
D15
LED Red
21
1206
C14
10 uFd 16v
0805
R58 0 E
1 2
TVS3
5V 350W
12
1206R
D17
LED Red
21
0805
R57 0 E
1 2
0402
R37
560E
Sensor
B7
CapSense Button 8mm Round
1
CMOD1
1206R
D16
LED Red
21
0402
R33
560E
0805
R59 0 E
1 2
0805 R49
665 E
12
0402
R43
560E
0805 R46
665 E
12
Sensor
B4
CapSense Button 8mm Round
1
0805 R41
665 E
12
0805 R29
665 E
12
0402
R39
560E
0805
R520 E
12
0805 R30
665 E
12
C13
2.2nF
0805 R48
665 E
12
CY3280-MBR2 CapSense Express with SmartSense Auto-Tuning Kit Guide, Doc. # 001-71857 Rev. *C 41
A.1.2 Flex-PCB
NC
NC
NC
Flex_BTN8
Flex_BTN5
Flex_BTN2 Flex_BTN9
Flex_BTN3
Flex_BTN4Flex_BTN7
Flex_BTN1
Flex_BTN6
Flex_BTN0
VDD_Dev
J6
22x2_RA_Header
J6
22x2_RA_Header
1
122
3
344
5
566
7
788
9
910 10
11
11 12 12
13
13 14 14
15
15 16 16
17
17 18 18
19
19 20 20
21
21
23
23
25
25
27
27
29
29
31
31
33
33
35
35
37
37
39
39
22 22
24 24
26 26
28 28
30 30
32 32
34 34
36 36
38 38
40 40
41
41 42 42
43
43 44 44
Flex_BTN0
Flex_BTN7
Flex_BTN6
Flex_BTN8
Flex_BTN9
Flex_BTN3
Flex_BTN4
Flex_BTN1
Flex_BTN2
Flex_BTN5
Sensor
B4
CapSense Button CIR11MM_2MM
Sensor
B4
CapSense Button CIR11MM_2MM
1
Sensor
B3
CapSense Button CIR12MM_1MM
Sensor
B3
CapSense Button CIR12MM_1MM
1
Sensor
B2
Capsesnse button CIR11MM_1MM
Sensor
B2
Capsesnse button CIR11MM_1MM
1
Sensor
B6
CapSense Button CSB14_29X7_29OBL_1MM
Sensor
B6
CapSense Button CSB14_29X7_29OBL_1MM
1
Sensor
B1
CapSense Button CSB_10MM_RND
Sensor
B1
CapSense Button CSB_10MM_RND
1
Sensor
B0
CapSense Button CSB14_29X7_29OBL_2MM
Sensor
B0
CapSense Button CSB14_29X7_29OBL_2MM
1
Sensor
B8
CapSense Button CSB15_92X7_96OBL_1MM
Sensor
B8
CapSense Button CSB15_92X7_96OBL_1MM
1
Sensor
B7
CapSense Button CSB13_26X6_63_OBL_2MM
Sensor
B7
CapSense Button CSB13_26X6_63_OBL_2MM
1
Sensor
B5
CapSense Button CSB_10MM_RND_2MM
Sensor
B5
CapSense Button CSB_10MM_RND_2MM
1
Sensor
B9
CapSense Button CSB13_26X6_63_OBL_1MM
Sensor
B9
CapSense Button CSB13_26X6_63_OBL_1MM
1
42 CY3280-MBR2 CapSense Express with SmartSense Auto-T un i n g Kit Guide, Doc. # 001-7185 7 R ev. *C
A.2 Board Layouts
A.2.1 CY3280-MBR2 Board Primary Side
CY3280-MBR2 CapSense Express with SmartSense Auto-Tuning Kit Guide, Doc. # 001-71857 Rev. *C 43
A.2.2 CY3280-MBR2 Board Secondary Side
44 CY3280-MBR2 CapSense Express with SmartSense Auto-T un i n g Kit Guide, Doc. # 001-7185 7 R ev. *C
A.2.3 Power Layer
CY3280-MBR2 CapSense Express with SmartSense Auto-Tuning Kit Guide, Doc. # 001-71857 Rev. *C 45
A.2.4 Ground Layer
46 CY3280-MBR2 CapSense Express with SmartSense Auto-T un i n g Kit Guide, Doc. # 001-7185 7 R ev. *C
A.2.5 Flex-PCB Primary Side
A.2.6 Flex-PCB Secondary Side
CY3280-MBR2 CapSense Express with SmartSense Auto-Tuning Kit Guide, Doc. # 001-71857 Rev. *C 47
A.3 Bill of Materials (BOM)
Item Qty Reference Description Manufacturer Mfr Part Number
1 5 C2,C1,C6,C12,C7 CAP .10UF 10V CERAMIC X7R
0603 Kemet C0603C104K8RACTU
22C3,C4 CAP CERAMIC 10.0UF 16V
X5R 1206 Kemet C1206C106K4PACTU
31C5 CAP CER 2200PF 50V 5% C0G
0805 Murata Electronics North
America GRM2165C1H222JA01D
41C8 CAP 1.0UF 16V CERAMIC Y5V
0805 Murata Electronics North
America GRM219F51C105ZA01D
51C9 CAP CER 2.2UF 10V 10% X7R
0805 Murata Electronics North
America GRM21BR71A225KA01L
6 1 C10,C11 CAP 10000PF 16V CERAMIC
X7R 0402 Yageo America CC0402KRX7R7BB103
71C13 CAP CERM 2200PF 1% 50V
NP0 1206 AV X Corporation 12065A222FAT2A
816
D2,D3,D6,D7,
D8,D9,D10,D11,
D12,D13,D14,
D15,D16,D17,
D18,D19
LED RED CLEAR 1206 REAR
MNT SMD Stanley Electric Co BR1111R-TR
92D4,D5 TVS 5.0 VOLT 600 WATT BI-
DIR SMB Littelfuse Inc SMBJ5.0CA
10 1 TVS3 IC TVS UNI-DIR 5V 350W Semtech SD05.TCT
11 1 F1 POLYSWITCH 1.10A RESET
FUSE SMD TE Connectivity MICROSMD110F-2
12 1 F2 POLYSWITCH .20A RESET
FUSE SMD TE Connectivity MINISMDC020F-2
13 2 J1,J2 CLIP BATTERY AAA/N
.375X.460" SS Keystone Electronics 55TR
14 1 J3 CONN USB MINI B SMT RIGHT
ANGLE TYCO 1734035-2
15 1 LS1 BUZZER AUDIO PIEZO 25V
SMD CUI Inc CMT-1603
16 1 P1 CONN FMALE 44POS DL .1" R/
A GOLD Sullins Electronics Corp. PPPC222LJBN-RC
17 3 R2,R3,R51 RES CHIP 0.0 OHM 1/10 1/8W
5% 0805 SMD Panasonic - ECG ERJ-6GEY0R00V
18 3 R4,R5,R7 RES 5.1K OHM 1/16 1/10W 1%
0603 SMD Yageo Corporation RC0603FR-075K1L
19 1 R6 RES 0.0 OHM 1/10W 0603 SMD Yageo Corporation RC0603JR-070RL
20 12
R9,R10,R33,R34,R
35,R36,R37,
R39,R40,R42, R43,
R44
RES 560 OHM 1/16W 1% 0402
SMD Vishay/Dale CRCW0402560RFKED
21 1 R11 RES 52.3K OHM 1/10W 1%
0603 SMD Yageo RC0603FR-0752K3L
22 1 R12 RES 5.1K OHM 1/10W 5% 0603
SMD Yageo RC0603JR-075K1L
23 1 R14, R13 RES 51K OHM 1/10W 5% 0603
SMD Yageo RC0603JR-0751KL
24 1 R15 RES 24.0K OHM 1/10W 1%
0603 SMD Yageo RC0603FR-0724KL
25 1 R16 RES 10K OHM 1/10W 5% 0603
SMD Yageo RC0603JR-0710KL
48 CY3280-MBR2 CapSense Express with SmartSense Auto-T un i n g Kit Guide, Doc. # 001-7185 7 R ev. *C
26 1 R17 RES 30.1K OHM 1/10W 1%
0603 SMD Yageo RC0603FR-0730K1L
27 1 R18 RES 6.8K OHM 1/10W 5% 0603
SMD Yageo RC0603JR-076K8L
28 2 R19,R21 RES 7.5K OHM 1/10W 5% 0603
SMD Yageo RC0603JR-077K5L
29 3 R22,R23,R24 RES 47 OHM 1/10W 5% 0603
SMD Yageo RC0603JR-0747RL
30 2 R25,R26 RES 22 OHM 1/8W 5% 0805
SMD Panasonic - ECG ERJ-6GEYJ220V
31 1 R28 RES 100K OHM 1/10W 5%
0603 SMD Rohm MCR03EZPJ104
32 1 SW1 SWITCH MINI SLIDE SP4T APEM Components, LLC SLB1470R
33 1 U1 IC LOAD SW HGH SIDE 1.2A
SC70-6 Micrel Inc MIC94090YC6 TR
34 1 U2 IC SINGLE INVERTER GATE
SOT-23-5 Texas Instruments SN74LVC1GU04DBVR
35 1 U3 IC MCU CAPSENSE QFN16 Cypress Semiconductor CY8CMBR2044-24LKXI
36 1 U4A IC LDO REG 1A SOT223-6 Texas Instruments TPS73701DCQ
37 1 U5 IC PSOC 16KB FLASH 56QFN Cypress Semiconductor CY8C24894-24LFXA
38 1 U6 IC SINGLE USB PORT TVS
SOT-23-6 Texas Instruments SN65220DBVR
39 1 U7 IC MCU CAPSENSE QFN32 Cypress Semiconductor CY8CMBR2110-24LQXI
40 16
R1,R8,R20,R27,
R29,R30,R31,
R32,R38,R41,
R45,R46,R47,
R48,R49,R50
RES 665 OHM 1/8W 1% 0805
SMD Panasonic-ECG ERJ-6ENF6650V
41 1 PCB FLEXIBLE PRINTED CIRCUIT
BOARD Open Source PDC-09807 Rev03
42 1 D1 DIODE SCHOTTKY 0.5A 20V
SOD-123 Fairchild Semiconductor MBR0520L
43 10 R52,R53,R55,
R56,R57,R58,
R59,R60,R61, R62
RES CHIP 0.0 OHM 1/10 1/8W
5% 0805 SMD Panasonic - ECG ERJ-6GEY0R00V
44 1 J4 CONN HEADER 5POS 0.1
VERT KEYED Molex 22-23-2051
45 1 D1 DIODE SCHOTTKY 0.5A 20V
SOD-123 Fairchild Semiconductor MBR0520L
46 10 R52,R53,R55,
R56,R57,R58,
R59,R60,R61, R62
RES CHIP 0.0 OHM 1/10 1/8W
5% 0805 SMD Panasonic - ECG ERJ-6GEY0R00V
47 1 J4 CONN HEADER 5POS 0.1
VERT KEYED Molex 22-23-2051
48 1 J6 CONN HEADER .100 DUAL R/A
44POS Sullins Electronics Corp. PBC22DBAN
Item Qty Reference Description Manufacturer Mfr Part Number
