Cypress Semiconductor CY3280-MBR3 User Guide

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CY3280-MBR3 Evaluation Kit User Guide

Doc. #: 001-89905 Rev. *B

Cypress Semiconductor

198 Champion Court

San Jose, CA 95134-1709

Phone (USA): +1.800.858.1810

Phone (Intnl): +1.408.943.2600

http://www.cypress.com

Copyrights

© Cypress Semiconductor Corporation, 2014. The information contained here in is subject to ch ange wi thout noti ce. Cypress Semiconductor Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a Cypress product. Nor does it convey or imply any license under patent or other rights. Cypress products are not warranted nor intended to be used for medical, life support, life saving, critical control or sa fety applica tions, unless pursu ant to an express written agreement with Cypress. Furthermore, Cypress does not authorize its products for use as critical components in lifesupport systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges.

Any Source Code (software and/or firmware) is owned by Cypress Semiconductor Corporation (Cypress) and is protected by and subject to worldwide patent protection (United States and foreign), United States copyright laws and international treaty provisions. Cypress hereby grants to licensee a personal, non-exclusive, non-transferable license to copy, use, modify, create derivative works of, and compile the Cypress Source Code and derivative works for the sole purpose of creating custom software and or firmware in support of licensee product to be used only in conjunction with a Cypress integrated circuit as specified in the applicable agreement. Any reproduction, modification, transla tion, compilation, or representation of this Source Code except as specified above is prohibited without the express written permission of Cypress.

Disclaimer: CYPRESS MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARD TO THIS MATERIAL, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Cypress reserves the right to make changes without further notice to the materials described herein. Cypress does not assume any liability arising out of the applica tion or use of any product or circuit described herein. Cypress does not authorize its products for use as critical components in life-support systems whe re a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress’ product in a life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges.

Use may be limited by and subject to the applicable Cypress software license agreement. PSoC and CapSense are registered trademarks and EZ-Click and PSoC Creato r are trademarks of Cyp ress Semiconductor

Corp. All other trademarks or registered trademarks referenced herein are property of the respective corporations.

Flash Code Protection

Cypress products meet the specifications contained in their particular Cypress PSoC Data Sheets. Cypress believes that its family of PSoC products is one of the most secure families of its kind on the market today, regardless of how they are used. There may be methods, unknown to Cypress, that can breach the code protecti on features. Any of these methods, to our knowledge, would be dishonest and possibly illegal. Neither Cypress nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as ‘unbreakable’.

Cypress is willing to work with the customer who is concerned about the inte grity of their code. Co de prot ection i s constantly evolving. We at Cypress are committed to continuously improving the code protection features of our products.

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 2

Safety Information 5

1. Introduction 7

1.1 Kit Contents..................................... ... ... ....................................... ... ... ... .... ..................8

1.2 Getting Started.............................................................................................................8

1.3 Factory Default Configuration............................................................. ... .... ... ... ... .........9

1.4 Additional Learning Resources..................... ... ... ... ... .... ... ... .........................................9

1.5 Technical Support........................................................................................................9

1.6 Acronyms.....................................................................................................................9

1.7 Document Conventions .............................................................................................10

2. Kit Installation 11

2.1 Before You Begin.......................................................................................................11

2.2 CY3280-MBR3 EVK Software ...................................................................................11

2.3 Install the Software ....................................................................................................12

2.4 Uninstall the Software................................................................................................15

3. Kit Operation 16

3.1 Powering the Kit.................. ... ... ....................................... ... ... .... ... ... ... ... .... ... ... ... .... ...18

3.2 Communication Between PC Host and Kit ................................................................20

3.3 Configuring the CY8CMBR3116 Controller Using EZ-Click 2.0 ................................21

3.4 Kit Features ........ ... ... ....................................... ... ... ... .... ... ... ... ....................................28

3.4.1 SmartSense Auto-Tuning Feature............................................................... ...28

4. Hardware 32

4.1 Board Details ................................... ... ... ... .... ... ...................................... .... ... ... ... .... ...32

4.2 Theory of Operation..................... .... ... ... ... .... ... ... ... ....................................... ... ... .... ...33

4.3 Functional Description .................................. ......................................... .... ................34

4.3.1 CY8CMBR3116 CapSense Controller ...........................................................34

4.3.2 PSoC 5LP ......................................................................................................35

4.3.3 Power Supply System....................................................................................36

4.3.4 Button Sensors and Proximity Loop Sensor .................................................42

4.3.5 CY3280-MBR3 Kit LEDs ................................................................................43

4.3.6 Buzzer, Shield, and Host Interrupt Multiplexing Jumper ................................44

4.3.7 Capacitance Variation Demonstration............................................................46

4.3.8 Arduino-Compatible Headers..................... ... .... ... ... ... .... ... ... ... ... .... ... ... ..........47

4.3.9 Push Button to Reset CY8CMBR3116...........................................................50

4.3.10 I2C Selection Jumpers...................................................................................50

5. Configuration Files and Exampl e Projects 51

5.1 Running Configuration Files and Host Projects.........................................................51

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Contents

5.2 Configuration Files.....................................................................................................51

5.2.1 LED Toggle.....................................................................................................52

5.2.2 Proximity Detection........................................................................................55

5.2.3 Water Tolerance.............................................................................................58

5.3 PSoC 4 Host Example Projects.................................................................................62

5.3.1 Host_LED_Toggle_Buzzer_PSoC4_Pioneer_Kit...........................................63

5.3.2 Host_Interrupt_LED_ON_Time_PSoC4_Pioneer_Kit....................................68

5.3.3 Configuring the MBR3 Device From the PSoC 4 Pioneer Kit . .......................72

6. Advanced Topics 74

6.1 Using PSoC 5LP as USB-I2C Bridge ........................................................................74

6.2 Restoring to Factory Default Slave Address from 0x00.............................................78

A. Appendix 79

A.1 Schematic..................................................................................................................79

A.2 Pin Assignment Table................................................................................................87

A.3 Bill of Materials ..........................................................................................................88

A.4 Regulatory Compliance Information ... ... ... .... ... ... ... ... .... ... ... ... .... ... ... ... ... .... ... ... ... .... ...89

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Safety Information

The CY3280-MBR3 Evaluation Kit contains electrostatic discharge (ESD) sensitive devices. Electrostatic charges readily accumulate on the human body and any equipment, and can discharge without detection. Permanent damage may occur on devices subjected to high-energy discharges. Proper ESD precautions are recommende d to avoid performance degradation or loss of functionality. Store unused CY3280-MBR3 boards in the protective shipping package.

End-of-Life/Product Recycling This kit has an end-of life five years from the date of manufacture

mentioned on the back of the box. Contact your nearest recycler for disposing the kit.

Regulatory Compliance

The CY3280-MBR3 Evaluation Kit is intended for use as a development platform for hardware or software in a laboratory environment. Th e board is an open system design, which do es not inclu de a shielded enclosure. This may cause interference to other electrical or electronic devices in close proximity.

In a domestic environment, this product may cause radio interference. The user may then be required to take adequate prevention measures. Also, the board should not be used near any medical equipment or RF devices.

Attaching additional wiring to this product or modifying the product ope ration from the factory default may affect its performance and cause interference with other apparatus in the immediate vicinity. If such interference is detected, suitable mitigating measures should be taken.

The CY3280-MBR3 Evaluation Kit as shipped from the factory has been verified to meet the requirements of CE as a Class A product.

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Safety Information

General Safety Instructions

ESD Protection

ESD can damage boards and associated components. Cypress recommends that you perform procedures only at an ESD workstation. If an ESD workstation is not available, use appropriate ESD protection by wearing an antistatic wrist strap attached to chassis ground (any unpainted metal surface) on your board when handling parts.

Handling Boards

CY3280-MBR3 boards are sensitive to ESD. Hold the board only by its edges. After removing the board from its box, place it on a grounded, static-free surface. Use a conductive foam pad if available. Do not slide board over any surface.

6 CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B

1. Introduction

Thank you for your interest in the CY3280-MBR3 Evaluation Kit (EVK). This kit is designed to showcase the abilities of the CY8CMBR3116 register-configurable CapSense

controller. It is also designed as an Arduino™-compatible shie ld that supports various Arduino baseboards as well as other stackable shields available in the market. The CY3280-MBR3 EVK features four CapSense buttons, one proximity sensor loop, LEDs, a buzzer, and an onboard USB-I

C bridge to communi-

cate with the EZ-Click™ 2.0 customizer tool, which configures the CY8CMBR3xxx controller. The CY8CMBR3xxx series is the latest addition to the register-configurable CapSense Mechanical

Button Replacement (MBR) family of solutions. The CY8CMBR3xxx family of controllers enables you to quickly and easily add capacitive touch sensin g to your user interface. See Configuring the

CY8CMBR3116 Controller Using EZ-Click 2.0 on page 21 for information on how to configure a

CY8CMBR3116 controller. CY3280-MBR3 offers the best feat ures of Cypr ess’ CapSen se in a small package that is easy to implement and configure. Coupled with the Capacitive Sigma Delta PLUS (CSD PLUS) sensing algorithm and the patented SmartSense™ Auto-Tuning feature, the CY8CMBR3xxx controller provides a robust capacitive sensing solution, with up to 16 CapSense inputs.

SmartSense Auto-Tuning has the following advantages:

■ Reduces design effort by eliminating manual tuning

■ Adapts to variations in PCB, overlay, paint, and manufactu ring that degrade touch-sensing per-

formance

■ 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

The MBR3 solution delivers a high signal-to-noise ratio (SNR) even in extremely noisy environments and maintains optimal sensor performance at run time. The driven shield capability offers robust proximity sensing and water tolerance, enabling its use in a wide range of applications. The MBR3 solution supports register configurability and SmartSense Auto-Tuning features, which allow customers to gain a faster time-to-market for their end product.

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: Boot, Active, Look-for-Touch, Look-for-Proximity, Deep Sleep, and Configuration. The CY8CMBR3xxx controllers automatically manage transitions between the four states. The Look-for-Proximity state allows ultra-low power consumption whe n a hu man bod y is not in close proximity. This state is entered only if the wake-on-approach feature is enabled (and toggle is disabled) in the MBR3 register configuration, which can be done using the EZ-Click 2.0 customizer tool. Refer to the MBR3 device datasheet for more details on the CY8CMBR3xxx family of CapSense controllers.

The kit package includes the EZ-Click 2.0 customizer tool, which is required to co nfigur e the kit. For more information and to download the tool, visit the EZ-Click Customizer page.

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1.1 Kit Contents

The CY3280-MBR3 EVK includes the following components (see Figure 1-1):

■ CY3280-MBR3 EVK with a 2-mm overlay

■ One additional overlay of 1-mm thickness

■ A to Mini-B USB cable

■ Water dropper

Figure 1-1. Kit Contents

Introduction

Inspect the contents of the kit. If you find any part missing, contact your ne ares t Cypre ss sales office for help: www.cypress.com/go/support.

1.2 Getting Started

This kit guide helps to familiarize you with the CY3280-MBR3 EVK. The Kit Installation chapter on

page 11 describes the installation of the EVK software. The Kit Operation chapter on page 16

explains how to configure the CY8CMBR3116 controller on the kit to test different features using the EZ-Click 2.0 customizer tool. The hardware details, and configuration files and example projects are explained in their respective chapters. The configuration files and example projects require EZ-Click and PSoC Creator™, respectively. The Advanced Topics chapter on page 74 describes how to use the Bridge Control Panel (BCP) to configure the MBR3 device. The Appendix on page 79 pr ovides the schematics, board layout, pin assignment, and the bill of materials (BOM).

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1.3 Factory Default Configuration

The kit installation folder includes three configuration files that demonstrate several features of the CY8CMBR3116 CapSense controller. The section, Configuration Files on page 51, provides more details. The CY3280-MBR3 EVK is configured with the Water Toleranc e configuration by default. In this configuration, water tolerance, flanking sensor suppression (FSS), and auto-reset features are enabled for four CapSense buttons. The LEDs are also enabled to provide visual feedback for CapSense button touch. For mor e details on configurin g the MBR3 device, refe r to the EZ- Click 2.0 Customizer Tool User Guide, available at <Install_Directory>\EZ-Click\<version>\Doc- umentation.

1.4 Additional Learning Resources

Visit the CY8CMBR3116 CapSense Controller page for additional learning resources.

1.5 Technical Support

For assistance, go to our support web page, or contact our customer support at +1(800) 541-4736 extension 2 (in the USA), or +1 (408) 943-2600 extension 2 (International).

Introduction

1.6 Acronyms

Table 1-1. Acronyms Used in the Document

Acronyms Definition

BCP Bridge Control Panel BOM bill of materials CS capacitive sensor CSD CapSense sigma delta ESD electrostatic discharge EVK evaluation kit FSS flanking sensor suppression GPO general-purpose output GUI graphical user interface

IIC/I LED light-emitting diode MBR mechanical button replacement NC not connected PC personal computer PCB printed circuit board

PSoC SNR signal-to-noise ratio UART universal asynchronous receiver/transmitter USB universal serial bus

inter-integrated circuit

Programmable System-On-Chip

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1.7 Document Conventions

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]

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.

Introduction

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2. Kit Installation

This chapter describes the CY3280-MBR3 EVK software installation and the prerequisites.

2.1 Before You Begin

All Cypress software installations require administrator privileges, but these are not required to run the software after it is installed. Close any other Cypress software that is curre ntly running before installing the kit software.

Note: The kit contents are installed in the C:\Program Files\Cypress folder by default. If the EZ-Click configuration files or PSoC 4 host projects are being run from the default install location, administrator privileges are required. If you do not have administrator privileges, copy the Firmware folder from the default install location to any other location on your PC and access the files.

2.2 CY3280-MBR3 EVK Software

The kit requires Cypress' proprietary sof tware, such as PSoC Programmer and the EZ-Click customizer tool, and generic software such as .NET Framework, Windows Installer, and Internet Explorer. The CY3280-MBR3 software is available on the kit web page in three formats:

Table 2-1. Kit Software Formats

Install Package File Format Usage

This package can be used if the PC does not have any Cypress or non-

CY3280-MBR3_Kit ISO ISO

CY3280-MBR3_Kit Setup EXE

CY3280-MBR3_Kit Only EXE

Cypress prerequisite software installed. It first installs the prerequisites and then the kit content (firmware, hardware, and docu mentation files) in the specified location.

This package can be used if the PC does not have any Cypress p rerequi site software installed. If any non-Cypress prerequisites are found to be missing during installation, the installer provides links to download and install them and then installs the kit content (firmware, hardware, and documentation files) in the specified location.

This package can be used if the PC has all the Cypress and non-Cypress prerequisites installed. It install s only the kit conten t (firmware, hardware, and documentation files) in the specified location. If any of the prerequisites are found missing during the installation process, the installer prompts you to install a ll the require d software b efore att empting to inst all the kit. The installer redirects to the kit web page to download and install any missing Cypress software. Similarly, it provides links to download and install the missing non-Cypress prerequisites.

Notes:

■ Adobe Reader is required to view kit document s. If Adobe Reade r is not inst alled on your PC, the

installer provides the link to download and install it.

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■ PSoC Creator is required to execute the PSoC 4 host example projects shipped with the kit.

However, it is not a mandatory prerequisite and is not installed along with the kit contents. You can download and install PSoC Creator from www.cypress.com/go/psoccreator.

2.3 Install the Software

1. Run cyautorun.exe in the kit ISO to start the installation process.

2. Click Install CY3280-MBR3 EVK to start the kit installation; see Figure 2-1. Figure 2-1. Kit Installer Startup Screen

Kit Installation

3. Select the folder to install the CY3280-MBR3 EVK files. Choose the directory and click Next, as

shown in Figure 2-2. The installation directory is referred to as <Install_Directory> in this document.

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Figure 2-2. Default Path for EVK Installation

Kit Installation

4. When you click Next, the CY3280-MBR3_Kit ISO installer automatically installs the required soft-

ware, if it is not present on your computer.

5. Select the installation type (see Figure 2-3). The drop-down menu contains three options:

Typical (installs all the required features), Custom (lets you choose the feature s to be installed), and Complete (installs all the contents). Click Next after you select the installation type.

Note: It is recommended that you choose the Complete installation type.

Figure 2-3. Installation Type Options

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Kit Installation

6. Accept the End-User License Agreement and click Next to proceed with the installation.

7. When the installation begins, a list of packag es appears on the installation page. A green check

mark appears adjacent to every package after successful installation, as Figure 2-4 shows.

Figure 2-4. Installation Page

8. Click Finish to complete the CY3280-MBR3 EVK installation, as illustrated in Figure 2-5. Figure 2-5. CY3280-MBR3 EVK Installation Complete

After the installation is complete, the kit contents are available at the following location:

<Install_Directory>\CY3280-MBR3 EVK\<version>

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2.4 Uninstall the Software

You can uninstall the CY3280-MBR3 EVK software using one of the following methods:

■ Go to Start > All Programs > Cypress > Cypress Update Manager > Cypress Update Man-

ager; select the Uninstall button corresponding to the kit software.

■ Go to Start > Control Panel > Programs and Features; select the Uninstall/Change button

corresponding to the kit software.

Kit Installation

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3. Kit Operation

USB connector

Kit current measurement jumper on the reverse of the board

Slide switch to increase capacitanceonBTN2

Reset switch

Status LED

Power LED

CapSense buttons with 10-mm

diameter and LED at the center

Proximity LED

Proximity loop

CapSense buttons with 11-mm diameter and LED at the center

The CY8CMBR3116 CapSense controller is a register-configurable device that supports multiple features, as listed in Kit Features on page 28. The CY3280-MBR3 EVK hardware includes four CapSense buttons, a proximity sensor loop, a buzzer, and LEDs; it can be used to demonstr ate all the features of the MBR3 device.

The CY3280-MBR3 EVK enables you to develop applications using the CY8CMBR3116 controller.

Figure 3-1 and Figure 3-2 illustrate the onboard components of the CY3280-MBR3 EVK.

Figure 3-1. CY3280-MBR3 EVK Top View

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Figure 3-2. CY3280-MBR3 EVK Bottom View

Arduino headers

Slide switch SW1 (capacitance selector switch for BTN2)

Slide switch SW3 (trace selection switch for BTN4)

Buzzer

I2C selection jumpers

Buzzer, Shield, and Host

Interrupt selection jumpers

PSoC 5LP USB-I2C

bridge

CY8CMBR3116 CapSense

Express controller

MBR3 current

measurement jumper

Reset switch

USB connector

Kit current

measurement jumper

Kit Operation

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3.1 Powering the Kit

To power the kit, connect the A to Mini-B USB cable, provided with the kit, to yo ur PC or lap to p . T h e kit enumerates as a composite device (see Table 3-1), and three separate devices appear under the Device Manager (Start > Control Panel > Device Manager) option of the Windows operating system, as shown in Figure 3-5.

Table 3-1. CY3280-MBR3 Evaluation Kit in Device Manager after Enumeration

Port Description

USB input device KitProg programmer Programmer and debugger

KitProg USB-UART USB-UART bridge appears as COM# port

Note: Although the kit supports a programmer and a UAR T bridge , these functionalities are no t used with this kit. Do not use PSoC Programmer to communicate with the PSoC 5LP on the kit, as it may corrupt the kit firmware.

Figure 3-3. KitProg Driver Installation

USB-I

C bridge

Kit Operation

Figure 3-4. KitProg Driver Installation Complete

After the driver installation is complete, all the above devices are listed in the Device Manager, as shown in Figure 3-5.

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Figure 3-5. Device Manager View after KitProg is Installed

Kit Operation

Note: The Device Manager may have more than one instance of ‘USB Input De vice' and ' USB Composite Device', based on the number of USB devices connected to your PC. The USB Input Device and USB Composite Device installed with KitProg can be identified by the hardware IDs (VID and PID); these devices will have hardware IDs 0x4B4 and 0xF139. To find the hardware ID, right-click on the device and select Properties. In the Details tab, select Hardware IDs from the Property field drop-down menu.

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Wait until the USB enumeration completes successfully and the board is powered. When the USB

PC Host

I2C Commands

through U SB

EZ-Click 2.0

Customizer

Tool

LED1

Prox

Loop

Buzz

Shield

P5LP as USB-I2C

Bridge

MBR3

I2C Commands

LED2

LED3 LED4LED5

enumeration is successful, both the power LED and status LED light up. The kit is programmed with the Water Tolerance configuration by default. See Wate r Toler anc e o n

page 58 for more information.

3.2 Communication Between PC Host and Kit

The kit includes PSoC 5LP, an ARM-based PSoC that functions as a USB-I2C bridge between the CY8CMBR3116 controller and the PC host (see Figure 3-6). The CY8CMBR3116 controller communicates with PSoC 5LP using an I PC and EZ-Click 2.0 customizer tool.

Figure 3-6. Block Diagram - Communication Between PC Host and Kit

C interface, and the PSoC 5LP transfers the data over USB to the

Kit Operation

Cypress provides two USB-I CY3280-MBR3 EVK uses the EZ-Click 2.0 customizer tool for register configuration. BCP is the software provided by Cypress that allows yo u t o co mmu n ica te ove r I

C software utilities: EZ-Click 2.0 and Bridge Control Panel (BCP). The

C, SPI, or RX8 using your PC and USB. This application currently supports CY3240, MiniProg3, FirstTouch, FirstTouchRF, TrueTouchBridge, DVKProg1, and KitProg bridges. See Using PSoC 5LP as USB-I2C Bridge on page 74 for more details on using the BCP.

You should install the EZ-Click 2.0 customizer tool on the PC to evaluate the kit features. This software is part of the kit installer, but it can also be downloaded from www.cypress.com/go/CY3280-

MBR3. You can use EZ-Click 2.0 to configure the CapSense controllers using I

over the USB-I

C bridge. You can also use it to monitor raw count, baseline, SNR, and other

C communication

CapSense sensor-related information directly.

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Figure 3-7. EZ-Click 2.0 Customizer Tool – Start Page

Kit Operation

3.3 Configuring the CY8CMBR3116 Controller Using EZ-Click 2.0

Follow these steps to configure the CY8CMBR3116 controller:

1. Connect the CY3280-MBR3 EVK to the PC via the USB port using the USB cable.

2. Open the EZ-Click 2.0 customizer tool from the default location: Start > All Programs > Cypress

> EZ-Click 2.0 > EZ-Click 2.0.

3. Create a new project in EZ-Click 2.0 by clicking New Project… in the File menu, as shown in

Figure 3-8.

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Kit Operation

Figure 3-8. Creating a New Project in EZ-Click 2.0

4. Enter an appropriate name for the project and choose a location to save your project. Select Tar-

get Device as ‘CY8CMBR3116’ from the Product Selector. To launch the Product Selector, click the Device Selector button, as shown in the following figure.

Figure 3-9. New Project Details

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Figure 3-10. Choosing Part Number in Product Selector Guide

Kit Operation

5. Ensure that the I

communication with the onboard PSoC 5LP USB-I

C selection jumpers J13 and J14 are shorted between pins 1 and 2 to allow

C bridge.

6. Connect the kit to the EZ-Click customizer tool by clicking the Select Target Device button ( )

on the EZ-Click tool bar. This opens a Select I2C Target window (Figure 3-11); select the follow- ing:

a. KitProg/<kit number> in the Ports window. b. The I

C slave device in the Devices window. Note: The CY8CMBR3116 has a slave address of 0x37 by default. If multiple slave devices are connected, you can disconnect from one slave and connect to another by using the Con- nect/Disconnect button in the Select I2C Target window. See Figure3-11.

c. Select the speed of the I

C communication as 400 kHz.

d. Choose the target device voltage by selecting the 3.3 V radio button.

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Figure 3-11. Connecting the Kit Using the EZ-Click 2.0 Customizer Tool

Kit Operation

7. Click OK. The I

C slave address of the connected device appears on the status bar at the bottom

of the EZ-Click window, as shown in Figure 3-12.

Figure 3-12. I

C Slave Address Display

8. Enable the button sensors in the CapSense sensor configuration tab, as sh own in Figure 3-13. See Pin Mapping Between CY8CMBR3116 and CY3280-MBR3 EVK on page 35 to learn about the available button sensors and how they are connected to the CY8CMBR3116 device. In this example, all four available button sensors on the kit are enabled.

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Kit Operation

Figure 3-13. Enabling Button Sensors Using EZ-Click 2.0

Note: The CapSense buttons BTN1/CS3, BTN2/CS4, BTN3/CS5, and BTN4/CS6 on the CY3280MBR3 EVK correspond to Button4, Button5, Button6, and Button7 in the EZ-Click 2.0 customizer tool, which map to pins CS3, CS4, CS5, and CS6 respectively on the MBR3 device. Figure 3-15 shows the corresponding four buttons for reference.

9. The sensor names can be modified if desired, as shown in Figure 3-14.

Figure 3-14. Changing Sensor Names

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Figure 3-15. Kit Buttons Corresponding to CapSense Sensor Pins

Kit Operation

10.Enable the corresponding LEDs in the Global configuration tab, as shown in Figure 3-16, to view the LED output for each button touch. Ensure that the GPO logic level is Active Low because the LEDs on the CY3280-MBR3 EVK are active low.

Note: LED1/GPO3, LED2/GPO4, LED3/GPO5, and LED4/GPO6 on the CY3280-MBR3 EVK correspond to LED4, LED5, LED6, and LED7 in the EZ-Click 2.0 customizer tool, which map to the general-purpose output (GPO) pins CS11/GPO3, CS12/GPO4, CS13/GPO5, and CS14/ GPO6 respectively on the MBR3 device.

Figure 3-16. Global Configuration Tab

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 26

Kit Operation

11.The LEDs can also be renamed, as shown in Figure 3-17.

Figure 3-17. Rename LEDs

12.Generate the configuration file by clicking the Generate Configuration File icon on the tool bar or by pressing [Ctrl] + [G]. The status of configuration file generation is shown in the status

bar at the bottom of the EZ-Click window (see Figure 3-18).

Figure 3-18. EZ-Click Status Bar Showing Configuration Generation Status

13.Click the Apply Current Configuration icon on the tool bar in the EZ-Click 2.0 customizer tool or press [Ctrl] + [L] to download the generated configuration to the MBR3 device.

14.Wait for the message “Device configuration completed successfully” to be displayed on the status bar, as illustrated in Figure 3-19.

Figure 3-19. EZ-Click Status Bar Showing Successful Device Configuration

15.Touch the buttons on the kit to observe the features as enabled in the configuration.

Note: The Water Tolerance configuration file is preloaded into the kit. The kit supports the features mentioned in Water Tolerance on page 58 by default. To learn more about the configurations, see

Configuration Files on page 51.

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 27

3.4 Kit Features

The CY3280-MBR3 EVK includes the following features:

■ Four CapSense buttons of two different sizes – two buttons of 10-mm diameter (BTN1 and

BTN2) and two buttons of 11-mm diameter (BTN3 and BTN4)

■ LEDs corresponding to sensors indicating button touch

■ A buzzer

■ Shield electrode pin for water tolerance

■ I

C selection jumpers

■ Arduino-compatible headers

■ One proximity loop and a corresponding LED to indicate proximity state (o n/off)

■ A host interrupt pin

■ Two slide switches on two CapSense buttons to vary trace capacitance and demonstrate

SmartSense Auto-Tuning

Note: The CS15 pin of the MBR3 device is multiplexed for the CapSense button, host interrupt, and shield electrode. Similarly, GPO7 is multiplexed for general-purpose output, host interrupt, and buzzer output. All three features – host interrupt, buzzer, and shield electrode (water tolerance) cannot be enabled simultaneously. See Buzzer, Shield, and Host Interrupt Multiplexing Jumper on

page 44 for more details on CS15 and GPO7 pin connections.

Kit Operation

3.4.1 SmartSense Auto-Tuning Feature

The CY8CMBR3116 device features SmartSense Auto-Tuning, which is the Cypress proprietary CapSense algorithm that compensates for system, manufacturing, and environmental changes while providing feature-rich CapSense solutions.

■ Reduces design effort by eliminating tedious manual tuning

■ Adapts to variations in PCB, overlay, paint, and manufactu ring that degrade touch-sensing per-

formance

■ Eliminates production-related manual tuning

■ Adapts to changes in system environment due to noise sources

■ Allows a platform design approach with different overlays, button shapes, and trace lengths

The CY8CMBR3116 also supports setting manual thresholds to override the auto-tuning mechanism, if required.

SmartSense Auto-Tuning is demonstrated using three methods on the kit. See Capacitance Varia-

tion Demonstration on page 46 for hardware details:

1. Using the SW1 slide switch to increase capacitance a. Power on the kit using USB or an external power supply on pin 4 of the J1 header. b. Touch BTN2 on the kit; the corresponding LED will turn on, providing visual feedback on each

button touch.

c. Increase the capacitance of BTN2 by sliding SW1 to add an additional 10-pF or 15-pF exter-

nal capacitance on the sensor, as shown in Figure 3-20; the LED turns on as if a touch occurred due to the increase in capacitance. Now, press the reset switch, SW2, to reset the board.

d. Touch BTN2 on the kit; the corresponding LED works normally. This demonstrates the

SmartSense Auto-Tuning algorith m, which automatically tunes for the increased CapSense button capacitance.

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 28

Kit Operation

Note: The SW1 switch has three positions: at the NC-BTN2 position, the button is directly connected to the CS4 pin on MBR3 and no additional capacitance is added. At the 10pF-BTN2 and 15pF-BTN2 positions, an additional trace capacit ance of 10 pF and 15 pF re spectively are a dded to the CapSense button.The SW1 switch simulates changes in trace parasitic capacitance.

Figure 3-20. SW1 Slide Switch in NC-BTN2 Position

2. Using a short/long trace by adjusting the SW3 slide switch on the kit a. Power on the kit using USB or an external power supply on pin 4 of the J1 header. b. Touch BTN4 on the kit. The LED corresponding to BTN4 will turn on, providing visual feed-

back on each touch.

c. Increase the parasitic capacitance of BTN4 by sliding SW3 (see Figure 3-21) to add a longer

trace on BTN4.

d. The LED turns on as if a touch occurred due to the increase in capacitance. Now, press the

reset switch, SW2, to reset the board.

e. Touch BTN4 on the kit; the corresponding LED works normally and provides visual feedback

on each touch. This demonstrates the SmartSense Auto-Tuning algorithm, which automatically tunes for the increase in CapSense button capacitance due to the long trace.

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 29

Figure 3-21. SW3 Slide Switch in Long Trace Position

Kit Operation

3. Using the additional 1-mm overlay provided with the kit, as shown in Figure 3-22 a. Power on the kit using USB or an external power supply on pin 4 of the J1 header. b. Touch BTN1 on the kit. The LED corresponding to BTN1 will turn on, providing visual feed-

back on each touch.

c. Place the additional 1-mm overlay, provided with the kit, on top of the board and press the

reset switch, SW2, to reset the board.

d. Touch BTN1 on the kit; the corresponding LED works normally and provides visual feedback.

This demonstrates the SmartSense Auto-Tuning algorithm, which automatically tunes for the increase in CapSense button capacitance due to an increase in overlay thickness.

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 30

Figure 3-22. Board with Additional 1-mm Overlay Placed on the 2-mm Overlay

Kit Operation

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 31

4. Hardware

The CY3280-MBR3 EVK is designed to demonstrate the features of the CY8CMBR3116 registerconfigurable CapSense controller with four CapSense buttons and a proximity sensor loop. The kit includes five sensor LEDs, which can be used to demonstrate the direct LED control feature of the CY8CMBR3116. It also contains two LEDs to indicate power and kit status. The CY8CMBR3116 controller supports multiple features, which are discussed in Functional Description on page 34.

The CY3280-MBR3 EVK has two communication options:

■ A USB interface for the USB-I

■ The I

4.1 Board Details

The CY3280-MBR3 EVK consists of the following blocks:

■ CY8CMBR3116 silicon

■ PSoC 5LP USB-I

■ Power supply system

■ Four button sensors and one proximity loop

■ CY3280-MBR3 EVK LEDs: A power, status, and proximity LED and four CapSense LEDs

■ Capacitance variation demonstration

■ Arduino-compatible headers

■ Push button to reset the CY8CMBR3116

■ Buzzer, shield, and host interrupt pin multiplexing jumper

■ I

C interface on the kit to connect to an external I2C host, for example, the PSoC 4 Pioneer

Kit (CY8CKIT-042).

❐ Two-position slide switch to select long/short trace for BTN4 ❐ Three-position slide switch to add capacitance on BTN2; the three positions of the slide switch

correspond to 10 pF, 15 pF, and no addition al ca pa cit an ce

C selection jumpers to select between onboard PSoC 5LP and external host.

C bridge

C bridge to communicate with the EZ-Click 2.0 customizer tool.

See Figure 3-1 for the CY3280-MBR3 board details.

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 32

4.2 Theory of Operation

CY8CMBR3116

P5LP

I2C-USB

Bridge

USB

Mini B

Four Red LEDs

(one for each

CapSense Button)

Proximity Red

LED

Power LED

Red

Status LED

Green

ESD Protection

IEC 61000-4-2

Level 4

LDO

Buzzer

Arduino Headers (From Baseboard)

Slide

Switch(SW1)

Proximity Sensor

VBUS

VADJ

1.8V/

3.3V/

4.7V

VDD

I2C_SDA/

SCL

I2C_SCL

HI/Buz

D+/D-

Variable Cp

(10pF, 15pF, 0pF)

Voltage

Control

Current

Sense

Buzzer

Shield

I2C

Host

Interrupt

I2C_SDA

Switch for

choosing a

longer parasitic

trace on BTN4

PolyZen

HI/

Shield

VDDIO2 =VDDIO3=VADJ

VDDIO0=VDDIO1=VBUS

VDD=VBUS

GND

Diode

V5.0

Jumper for

measuring Whole

Kit Current

Consumption

Reset SW

(SW2)

V4.6

V5.0_External

Slide

Switch(

SW3)

NO Load Res for

1.8V operation

Host

Interrupt

J11

J12

J15

J13 and J14

BTN2

BTN4

BTN1

BTN3

This section provides a block-level description of the CY3280-MBR3 EVK. Figure 4-1. Block Diagram

Hardware

This kit can be powered using the USB Mini-B, the Arduino-compatible header, or an external power supply. You can configure the input voltage (1.8 V, 3.3 V, 5 V, or external supply) while connecting the device to the EZ-Click 2.0 customizer tool. The voltage is controlled by using a low dropout (LDO) regulator, which can provide regulated power of 1.8 V, 3.3 V, and 4.7 V to the CY8CMBR3116 device. The power to the MBR3 device is controlled by the Power setting in the EZ-Click customizer tool; see Figure 3-11.

The CY3280-MBR3 EVK includes a status LED, a power LED, LEDs corresponding to all CapSense buttons, and a proximity LED co rresponding to the proximity loop on the kit. It contains an onboard PSoC 5LP, which acts as a USB-I

This kit also includes a reset button, which connects to the reset pin (XRES) of the CY8CMBR3116 device. All the unused pins of the device are brought out onto the Arduino header J2 on the kit to enable you to test different types of self-designed sensors and observe the output on the oscilloscope.

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 33

Note: The kit operation voltage is 4.7 V when the kit is configured for 5 V.

C bridge to support I2C communication using a PC host.

4.3 Functional Description

4.3.1 CY8CMBR3116 CapSense Controller

The CY8CMBR3116 CapSense controller includes the following features:

■ SmartSense Auto-Tuning – Cypress' CapSense algorithm that continuously compensates for

system, manufacturing, and environmental changes.

■ Proximity sensing – Supports configurability of sensors for proximity sensing.

■ Button sensor auto-reset – Prevents a stuck sensor when a metal object is placed close to that

sensor.

■ Flanking sensor suppression (FSS) – Eliminates false touches by distinguishing between signals

from closely spaced buttons.

■ Toggle (touch on/off) – Mimics the mechanical button functionality by toggling sensor output sta-

tus on every sensor activation.

■ LED-on time – Provides better visual feedback by enabling the general-purpo se ou tput (GPO) to

be on for a configurable period after the button is released.

■ Debounce control – Prevents false trigger by specifying the minimum time for which a sen sor

must be touched for a valid ON status.

■ Buzzer signal output – Enables direct drive of a buzzer with configurable frequency.

■ Host-controlled GPO – Enables device GPOs to be controlled by the host (I

■ LED brightness control – Offers duty cycle configurability to control the brightness of the LEDs

connected to the GPOs.

■ Wake-on approach – Wakes the device from low-power and switches to the active state using

proximity sensors.

■ Water tolerance – Enables water-tolerant user interface applications. The shield ele ctrode should

be enabled through the register map to prevent false touches under wet conditions. To prevent false touches in streaming water conditions, both the shield electrode and guard sensor need to be enabled. However, the MBR3 kit does not have the guard sensor loop. So, water tolerance under streaming water conditions cannot be tested on the board.

■ I

C slave – An I2C interface with support for 50/100/400-kHz clock speeds and hardware slave

address comparison.

■ Host interrupt – Alerts the host processor upon touch detection; for every touch and release

event, an active low pulse of typically 250 µs is generated.

■ System diagnostics – Supports production testing and debugging.

C master).

Hardware

See the CY8CMBR3116 datasheet for more details on these features. The CY3280-MBR3 EVK can be configured using the EZ-Click 2.0 customizer tool. The kit includes

three configuration files with specific features described in Configuration Files on page 51. Additional configurations can be generated and applied to the kit using this tool.

See the EZ-Click 2.0 Customizer Tool User Guide for additional details on how to generate more configurations to evaluate the features in this section using the EZ-Click 2.0 customizer tool. This guide is available at the location <Install Directory>\EZ-Click\<version>\Documenta-

tion.

4.3.1.1 Pin Mapping Between CY8CMBR3116 and CY3280-MBR3 EVK

The CY8CMBR3116 device can be configured for 16 button sensors of which two sensors are configurable as proximity sensors. The kit demonstrates four button sensors and one proximity sensor.

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 34

Table 4-1 maps the device pins to the physical sensors on the kit.

Table 4-1. Pin Mapping on the Kit

Sensor Device Kit

CS0/PS0

CS1/PS1

CS2/Guard CS3 CapSense button, controls GPO3 Used as button BTN1 on the kit

CS4 CapSense button, controls GPO4 Used as button BTN2 on the kit CS5 CapSense button, controls GPO5 Used as button BTN3 on the kit CS6 CapSense button, controls GPO6 Used as button BTN4 on the kit

CS7 CapSense button, controls GPO7

CS8/GPO0 CapSense button/general- purpose output

CS9/GPO1 CapSense button/general- purpose output

CS10/GPO2 CapSense button/general- purpose output

CS11/GPO3 CapSense button/general- purpose output

CS12/GPO4 CapSense button/general- purpose output

CS13/GPO5 CapSense button/general- purpose output

CS14/GPO6 CapSense button/general- purpose output

CS15/SH/HI

HI/BUZ/GPO7

CapSense button/proximity sensor, controls GPO0

CapSense button/proximity sensor, controls GPO1

CapSense button/guard sensor, controls GPO2

CapSense button/shield electrode/host interrupt

Host interrupt/buzzer output/general-purpose output

Connected to proximity loop on kit Routed to Arduino header; can be used for

external button/proximity sensor Routed to Arduino header; can be used for

external button/guard sensor

Routed to Arduino header; can be used for external button sensor

Connected to proximity LED on the kit; driven by CS0/PS0

Routed to Arduino header; can be used for external button sensor/GPO

Connected to LED1 on the kit; driven by CS3 (BTN1)

Connected to LED2 on the kit; driven by CS4 (BTN2)

Connected to LED3 on the kit; driven by CS5 (BTN3)

Connected to LED4 on the kit; driven by CS6 (BTN4)

Connected to header J15 multiplexing buzzer, shield, and host interrupt pin on the kit

Hardware

4.3.2 PSoC 5LP

An onboard PSoC 5LP is used as a USB-I2C bridge for communicating with the PC host. It also sets the operating voltage applied to the target device. The MBR3 d evice can be oper ated at e ither 5.0 V,

3.3 V, and 1.8 V. By default, the onboard PSoC 5LP USB-I

for the MBR3 device. The PSoC 5LP connects to the USB po rt of the PC th rou gh a USB Mini- B connector and to the I

C interface of the CY8CMBR3116 device.

PSoC 5LP is a true system-level solution, prov idin g an M CU, memo r y, analog, and digital peripheral functions in a single chip. The CY8C58LPxx family offers a modern method of signal acquisition, signal processing, and control with high accuracy, high bandwidth, and high flexibility. Analog capability spans the range from thermocouples (near DC voltages) to ultrasonic signals. For more information, refer to the PSoC 5LP web page and datasheet.

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 35

C bridge sets 3.3 V as operating voltage

4.3.3 Power Supply System

I/O Header

Protection

Device

5V_EXT

5.0 V

LDO

PSoC 5LP

Vdd, Vddio0, Vddio1

Vddio2 and

Vddio3

MBR3

VDD

SDA, SCL, Host INT and MBR3 XRES

USB

PTC

ESD

Protection

Jumper for Current Measurement of

MBR3

Jumper for

Whole Kit

Current

Measurement

J11

J12

Control Lines

EN_CTRL, 3.3_CTRL,

1.8_CTRL

The CY8CMBR3116 device supports operation from 1.71 V to 5.5 V. The CY8CMBR3116 device has two modes of operation: internally regulated mode a nd externally regulated mode. Table 4-2 lists the voltage ranges supported for both the operating modes.

Table 4-2. Operating Voltage Ranges for CY8CMBR3116 Device Modes

Operating Voltage Range Internally Regulated Mode Externally Regulated Mode

1.71 V to 1.8 V No Yes

1.8 V to 1.89 V Yes Yes

1.89 V to 5.5 V Yes No

Note: See the MBR3 device datasheet for more details. The power supply system on this board is versatile, allowing the input supply to come from the fol-

lowing sources:

■ 5-V power from the onboard USB Mini-B header (J10)

■ 5-V power from an Arduino board or an external supply using pin 4 of the J1 header

The power system of this kit is designed to support 1.8-V, 3.3-V, and 4.7-V operation of the CY8CMBR3116 device. At 1.8 V, the kit can be operated in either internally regulated or externally regulated mode. By default, the kit and ex ample projec ts are designed to operate in internally regulated mode. See Externally Regulated Operation Mode on page 37 to operate the kit in externally regulated mode. The PSoC 5LP firmware configures the required voltage according to the selection made while connecting to the USB-I Vbus voltage and enabling the LDO regulator (U2–MIC 5219). When the kit is powered externally through the J1 header, the kit operational voltage is regulated to 3.3 V.

Hardware

C bridge. This configuration is performed by monitoring the

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 36

When the board is powered using the Arduino header, a PolyZen protection device (U4) is added in series with the 5-V external power line to protect against overvoltag e an d reve rse- voltage scenarios. The device can protect overvoltage and reverse voltage up to 12 V.

Figure 4-2. Power Supply Block Diagram with Protection Circuits

Figure 4-3. Power Supply Section Schematic Snippet



Hardware

Figure 4-4. Protection from Overvoltage and Reverse Voltage from Arduino Header

4.3.3.1 Externally Regulated Operation Mode

To operate the kit in externally regulated mode at 1.8 V, solder resistors R84 and R85 with 0-ohm resistors. Select the Supply Voltage (V) parameter on the EZ-Click customizer tool, as shown in

Figure 4-5.

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 37

Figure 4-5. Supply Voltage Parameter for Externally Regulated Mode

Hardware

Populating R84 shorts the VCCD and VDD pin of CY8CMBR3116 for the externally regulated mode. Populating R85 ensures that the board is always powered at 1.8 V . This overrid es the power settings done from the EZ-Click customizer tool (see Figure 3-11).

Figure 4-6. R84 and R85 for Externally Regulated Operation at 1.8 V

Note: Do not configure the device with the Supply Voltage (V) parameter set to 1.8±5%, before populating resistors R84 and R85. If you do so, the EZ-Click customizer tool will throw an error, as shown in Figure 4-7. The kit will not be functional until the resistors R84 and R85 are populated.

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 38

Hardware

Figure 4-7. EZ-Click Error

To switch the kit operation from externally regulated mode to internally regulated mode, follow these steps:

1. Select the Supply Volt age (V) parameter on the EZ-Click customizer tool, as shown in Figure 4-8 and apply the configuration. This turns the internal regulator on.

Caution: You cannot apply any configuration if you remove resistors R84 and R85 before step 1.

Figure 4-8. Supply Voltage Parameter

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 39

2. Remove the USB cable connected to the kit.

3. Desolder (unpopulate) resistors R84 an d R85 ( Figure 4-6), which were previously loaded for externally regulated mode operation.

4. Connect the USB cable to the kit and apply the EZ-Click configuration with the Supply Voltage (V) parameter as 1.8-5.5, as shown in Figure 4-8.

Note: To operate the kit in internally regulated mode, the Supply Voltage (V) parameter should be selected as 1.8-5.5, as shown in Figure 4-8.

4.3.3.2 Protection Circuit

The power supply rail has reverse-voltage, overvoltage, and short-circuit protection features.

■ The PTC resettable fuse is connected to protect the comp uter's USB p orts from overcurrent; see

Figure 4-9.

Figure 4-9. USB Power Supply Section Schematic Snippet

Hardware

■ D2 – A series protection diode to ensure there is no back power to the header; see Figure 4-3.

■ U4 – A PolyZen protection device (ZEN056V075A48LS) that protects the kit against overvoltage

and reverse voltage from the headers; see Figure 4-4.

Caution: There is no protection on the current measurement jumper, test points, and I/O pins. Do not apply more than 5.5 V on these ports.

4.3.3.3 Procedure to Measure the CY8CMBR3116 Current Consumption

This kit provides a way to measure the current consumption of both the whole kit and the CY8CMBR3116 device individually, without soldering. There are two separate jumpers on the board for this purpose.

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 40

Hardware

1. T o measure current consumption of only the CY8CMBR3116 device, remove the power su pply by either disconnecting the USB cable or removing the power source at pin 4 of the J1 header and connect an ammeter across J12. Now , power the kit again b y either conn ecting the USB cable or supplying power at pin 4 of the J1 header.

Figure 4-10. CY8CMBR3116 Device Current Consumption Measurement

2. To measure the current consumption of the whole kit, remove board power and connect an ammeter across J11. Now, power the kit again by connecting the USB cable.

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 41

Figure 4-11. Kit Current Consumption Measurement

Hardware

Note: Do not remove the current measurement jumper J12 while the kit is powered. This can damage the MBR3 silicon.

4.3.4 Button Sensors and Proximity Loop Sensor

The kit has four CapSense buttons (two circular buttons of 10-mm diameter and two circular buttons of 11-mm diameter) and one proximity loop onboard, as Figure 4-12 shows. These sensors can be driven by the CY8CMBR3116 device to perform touch and proximity detection.

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 42

Figure 4-12. Button Sensor and Proximity Loop Connections on the Kit

Hardware

4.3.5 CY3280-MBR3 Kit LEDs

The EVK has seven onboard LEDs. A green LED (D15) indicates the status of the USB-I2C bridge. A red LED (D13) indicates the status of the power supplied to the board.

The kit also has an active-low red LED for each CapSense button and proximity loop. The CY8CMBR3116 drives these LEDs by driving the GPO low.

Figure 4-13 and Figure 4-14 detail the schematic of the LEDs.

Note: These LEDs are dim when working at 1.8 V compared to 3.3-V and 4.7-V operation. Figure 4-13. Power and Status LED Connection

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 43

Hardware

Figure 4-14. Sensor Indicator LEDs

Note: The sensor indicator LEDs are connected to the adjustable voltage, VADJ, which is the output of the LDO regulator (U2-MIC 5219). The ano de of a ll the LEDs is connected to VADJ, which is high. Therefore, these are all active-low LEDs.

4.3.6 Buzzer, Shield, and Host Interrupt Multiplexing Jumper

The CS15 pin of the MBR3 device is multiplexed for the CapSense button, host interrupt, and shield electrode. Similarly, GPO7 is multiplexed for general-purpose output, host interrupt, and buzzer output. All three features – host interrupt, buzzer, and shield electrode (water tolerance) cannot be enabled simultaneously. These features can be enabled using the multiplexing jumper J15, which has three combinations.

Table 4-3. J15 Combinations

Combination Features

A Buzzer on GPO7, Host Interrupt on CS15 B Host Interrupt on GPO7, Shield on CS15 C Buzzer on GPO7, Shield on CS15

Note: If water tolerance (shield) is not used and only buzzer or host interrupt features are used, then the shield pin must be connected to ground by shorting pins 5 and 6 of jumper J15.

See the MBR3 device datasheet and the schematic for more details.

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 44

Figure 4-15. Buzzer, Shield, and Host Interrupt Connection

Hardware

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 45

Figure 4-16. Default J15

Hardware

Note: The kit is shipped with the combination/setting 'C' and the third jumper is connected vertically so that it is not shorted to any other pin.

4.3.7 Capacitance Variation Demonstration

The kit provides three methods to demonstrate parasitic capacitance variation on the button sensors available on the kit, as shown in Figure 4-17. These methods are used to showcase the SmartSense auto-tuning capability of the device. See SmartSense Auto-Tuning Feature on page 28 to learn the procedure to test these methods using this kit.

The methods are:

■ Using the trace method: Button BTN4 (connected to the CS6 pin of CY8CMBR3116) is con-

nected to the SW3 slide switch, which can be used to provide two different routes between the pin and the sensor pad. One route is longer than the other. Different trace lengths have different parasitic capacitance; therefore, you can change the length of the trace to change the parasitic capacitance on the sensor.

■ Using external capacitance: The SW1 switch is provided to add an extra capacitance of 10 pF or

15 pF on BTN2 (connected to the CS4 pin of the CY8CMBR3116).

■ Using an additional 1-mm overlay: An additional overlay of 1 mm is provided with th is kit. You can

place this overlay over the sensors to change the parasitic capacitance.

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 46

Figure 4-17. Parasitic Capacitance Configuration

Hardware

4.3.8 Arduino-Compatible Headers

The I/O headers J1–J4 comply with t he Arduino UNO (R3 ) kit to support Ardu ino base boards . The Arduino-defined signals include digital/analog signals from the CY8CMBR3116; system power signals are brought to the outer rows of headers J1–J4.

Pin maps of the Arduino-compatible headers J1–J4 are shown in the following tables. The pins connected between the Arduino board and the CY3280-MBR3 EVK appear in red. The pins shown in blue are on the second row of the J2 connector; these are the unused pins of the CY8CMBR3116 device.

This kit also provides additional I by older Arduino boards, such as the Arduino UNO R2 and Arduino Mega boards. These lines are not connected (NC) by default and can be used by loading a 0- resistor on R71 and R72 and removing both jumpers from headers J13 and J14.

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 47

C lines on pins J2.9 (SDA) and J2.11 (SCL). These pins are used

Table 4-4. J1 Arduino Header or Power Connector

Power Connector (J1)

Pin Arduino Board Signal CY3280-MBR3 EVK Signal

J1.1 VIN NC J1.2 GND GND J1.3 GND GND J1.4 V5.0 V5.0 J1.5 V3.3 NC J1.6 RESET NC J1.7 IOREF NC J1.8 NC NC

Table 4-5. J2 Arduino Header

J2 Connector

Pin Arduino Board Signal CY3280-MBR3 EVK Signal

J2[1,3,5,7,] A0 – A3 NC J2.9 A4 SDA (Default – NC) J2.11 A5 SCL (Default – NC) J2.2 NC CS10 J2.4 NC CS9 J2.6 NC CS7 J2.8 NC PS1 J2.10 NC CS2/GAURD J2.12 NC GND

Hardware

Table 4-6. J3 Arduino Header

J3 Connector

Pin Arduino Board Signal CY3280-MBR3 EVK Signal

J3.1 D8 NC J3.2 D9 NC J3.3 D10 NC J3.4 D11 NC J3.5 D12 NC J3.6 D13 NC J3.7 GND GND J3.8 AREF NC J3.9 SDA J3_SDA J3.10 SCL J3_SCL

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Table 4-7. J4 Arduino Header

J4 Connector

Pin Arduino Board Signal CY3280-MBR3 EVK Signal

J4.1 D0 NC J4.2 D1 NC J4.3 D2 Host Interrupt J4.4 D3 NC J4.5 D4 NC J4.6 D5 NC J4.7 D6 NC J4.8 D7 NC

Figure 4-18. Arduino Connectors Schematic Snippet

Hardware

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 49

4.3.9 Push Button to Reset CY8CMBR3116

The kit contains a mechanical reset push button, SW2, to reset the CY8CMBR3116 device, as shown in Figure 4-19.

Figure 4-19. Push Button Reset Switch

4.3.10 I2C Selection Jumpers

Hardware

The I2C communication lines (SCL and SDA) can be connected to either the onboard USB-I2C bridge (PSoC 5LP) or to the I

Figure 4-18 for the schematic snippet.

C pin location on the Arduino header (J3.9 and J3.10). See

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5. Configuration Files and Example Projects

This section documents the high-level design process to open, configure, generate, and apply configuration files to the CY3280-MBR3 EVK using the EZ-Click 2.0 customizer tool. This kit provides three sample configurations. Each sample configuration file has different configuration settings, demonstrating various kit and device features. By default, the kit is configured with the Water Toler- ance sample configuration.

Table 5-1. Features in Configuration Files

Configuration Features

LED Toggle Four CapSense buttons, four LEDs, buzzer, and LED toggle Proximity Detection

Water Tolerance

To use the sample configuration files, you need the EZ-Click 2.0 customizer tool, which is installed along with the kit.

Four CapSense buttons, four LEDs, proximity loop, proximity LED, buzzer, and LED brightness

Four CapSense buttons, four LEDs, water tolerance, flanking sensor suspension (FSS), auto-reset

5.1 Running Configuration Files and Host Projects

The EZ-Click configuration files and PSoC 4 host projects require administrator privileges if they are run directly from the default install location (C:\Program Files\Cypress). If you do not have administrator privileges, copy the Firmware folder from the default install location to any other location on your PC and use the files.

5.2 Configuration Files

Follow these steps to run the configuration files and verify the features. Before running any of the configuration files, short pins 1 and 2 on J13 and J14. This is required to short the I tion lines (SCL and SDA) of the MBR3 device to the PSoC 5LP I

The jumper J15 should be in setting C, as shown in Figure 5-1.

C lines.

C communica-

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 51

Figure 5-1. Jumpers J13, J14, and J15 Settings

5.2.1 LED Toggle

This configuration file configures the CY8CMBR31 16 for demonstrating the LED toggle (touch o n/off) and buzzer drive features for all four available button sensors.

5.2.1.1 Loading LED Toggle Configuration

Configuration Files and Example Projects

1. Connect the CY3280-MBR3 EVK to the PC via the USB port using the USB cable. Ensure that the status and power LEDs glow.

2. Open the EZ-Click 2.0 customizer tool from the default location: Start > All Programs > Cypress > EZ-Click 2.0 > EZ-Click 2.0.

3. Click Open Project in the File menu. Figure 5-2 shows the default location of the Load Project action.

Figure 5-2. Load Project

4. Navigate to the project directory in the Open Project window.

5. Double-click the LED Toggle.cprj file to open it.

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Configuration Files and Example Projects

6. Ensure that the I2C selection jumpers J13 and J14 are shorted between pins 1 and 2 to allow communication with the PSoC 5LP onboard USB-I

C bridge.

7. Connect the kit to the EZ-Click 2.0 customizer tool using the following steps. a. Click the Select Target Device button ( ) on the tool bar of EZ-Click 2.0. b. Select 3.3 V as target power and 400 kHz as I

C speed; click OK to connect to the CY3280-

MBR3 EVK, which has the slave address of 0x37.

Figure 5-3. Connecting the Kit with the Customizer

8. Select Apply Current Config in the Configuration menu to apply the configura tion to the kit, as illustrated in Figure 5-4.

Figure 5-4. Apply Current Configuration

9. Wait until the message “Device configuration completed successfully” appears on the status bar at the bottom of the EZ-Click window, as displayed in Figure 5-5.

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Configuration Files and Example Projects

Figure 5-5. Successful Configuration Status Message

10.Verify the following features: a. Toggle (touch on/off) feature: Touch any CapSense button; the respective LED toggles its sta-

tus.

b. Buzzer feature (frequency of 4 kHz and duration of 100 msecs): Touch any CapSense button;

the respective LED toggles along with an audio feedback for 100 m secs at a 4-kHz frequ ency.

Figure 5-6. Verify LED Toggle Feature

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5.2.2 Proximity Detection

This configuration file configures the CY8CMBR3116 to demonstrate proximity detection, CapSense buttons, LED brightness, and buzzer drive features.

5.2.2.1 Loading Proximity Detection Configuration

1. Follow steps 1 to 4 as described in section 5.2.1.1 Loading LED Toggle Configuration.

2. Double-click the Proximity Detection.cprj file to open it.

3. Follow steps 6 to 9 as described in section 5.2.1.1 Loading LED Toggle Configuration to continue.

4. Verify the following features: a. CapSense buttons: Touch any CapSense button; the corresponding LED turns on, detecting

your touch.

b. LED brightness feature (93 percent Activ e du ty cyc le an d 7 pe rcent Inactive duty cycle): The

LEDs are driven by a pulse width modulator (PWM); the percentage of active and inactive duty cycles represent the PWM duty cycle for which the LEDs will be on. According to the configuration settings, when none of the CapSense buttons are touched, the LEDs glow with a faint brightness with a PWM duty cycle of 7 percent. When a CapSense button is touched, the LED glows with higher brightness, with a PWM duty cycle of 93 percent.

c. Buzzer feature (1-kHz frequency and 1-second duration): Touch a CapSense button or prox-

imity loop; the respective LED turns on along with an audio feedback for 1 second at a 1-kHz frequency.

Configuration Files and Example Projects

Figure 5-7. LEDs with 7 Percent Inactive Duty Cycle

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Figure 5-8. LEDs with 93 Percent Brightness on Button Touch

Configuration Files and Example Projects

d. Proximity: Hover your hand/finger (3-cm distance) over the kit; the proximity LED lights up,

showcasing proximity detection.

The proximity sensor has three states: OFF, Proximity, and ON (or Touch). The buzzer is enabled when the Proximity state becomes ON – when the pr oximity loop is touched. The change in Pro ximity state can be seen in the System Diagnostics tab in EZ-Click. In the System Diagnostics tab, select Sensor1 from the drop-down list and click St art to monitor the sensor status and SNR for the selected CapSense sensor.

Figure 5-9. Selecting Proximity Sensor in System Diagnostics

Figure 5-10. Proximity Sensor in Off State

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Figure 5-11. Proximity Sensor in Proximity State

Note: In the Proximity state, the LED brightness increases. Figure 5-12. Proximity Sensor in ON State

Configuration Files and Example Projects

In this state, the buzzer is also enabled. Note: The EZ-Click customiser tool computes the SNR. To establish a reliable noise range, the tool

should be allowed to collect data samples for at least 30 seconds before a button press or pro ximity sensor state change. If sufficient noise samples are not collected, the EZ-Click tool reports an error and extremely high values for SNR.

Figure 5-13. Verify Proximity Sensor

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5.2.3 Water Tolerance

This configuration file configures the CY8CMBR3116 to demonstrate water tolerance, FSS, and the button auto-reset feature. The Water Tolerance configuration is the factory default configuration for the CY3280-MBR3 EVK.

5.2.3.1 Loading Water Tolerance Configuration

1. Follow steps 1 to 4 as described in section 5.2.1.1 Loading LED Toggle Configuration.

2. Double-click the Water Tolerance.cprj file to open it.

3. Follow steps 6 to 9 as described in section 5.2.1.1 Loading LED Toggle Configuration to continue.

4. Verify the following features: a. FSS feature: Touch any CapSense button; the corresponding LED turns on. Keep your finger

on the same button and touch any of the other buttons; the LED corresponding to the second button does not turn on. Remove your finger from the first button and then touch the second button again; the corresponding LED turns on.

Figure 5-14. Verify FSS Feature

Configuration Files and Example Projects

b. Button auto-reset feature (5 seconds): Touch any CapSense button; the corresponding LED

turns on. Do not release your finger; the LED turns off automatically af ter 5 seconds.

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Figure 5-15. Auto-Reset Feature - LED Output on Button Touch

Configuration Files and Example Projects

Figure 5-16. Auto-Reset Feature - LED Output Five Seconds After Button Touch

Note: For the buzzer and LED effect features, use a voltage setting of 5 V or 3.3 V for optimal performance.

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Configuration Files and Example Projects

c. Water tolerance feature: Place the additional 1-mm overlay on top of the 2-mm overlay. Place

water droplets on top of the CapSense buttons using the water dropper provided with the kit. Observe that the LEDs do not turn on indicating that none of the CapSense buttons were triggered due to water.

Figure 5-17. Verify Water Tolerance - Without Finger

Touch a CapSense button and observe that it is triggered even in the presence of water droplets.

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Figure 5-18. Verify Water Tolerance - With Finger

Configuration Files and Example Projects

Note: The board does not have a guard sensor loop and cannot detect false touches in streaming water conditions. Therefore, while testing the board for water toler anc e failur e , ensure that the water droplets placed on one CapSense button do not come in contact with water droplets placed on another CapSense button.

Note: If the liquid in the dropper has significant conductivity, false touch may occur when the dropper touches the overlay on the board. This is not observed with clean water.

Water Tolerance Failure Demonstration: In the existing Water Tolerance configuration, uncheck the Enable Shield check box in the Global Configuration tab.

Figure 5-19. Water Tolerance Failure Demonstration

Now, click the 'Gene rate Config File' icon to g enerate the configu ration; apply it to the board by clicking the 'Apply Current Config File’ icon.

Press the reset switch, SW2, on the board and place water droplets on the CapSense button using the water dropper; observe that the LED turns on as if the button has been touched.

Note: The MBR3 SmartSense algorithm constantly updates baseline measurements, which may compensate for small droplets of water such that water tolerance failure is not observed. Therefore, a sufficient volume of water (one fu ll droppe r) is re quired to demonstrate water toleranc e failur e without the shield enabled.

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5.3 PSoC 4 Host Example Projects

In this section, you learn how to use the CY3280-MBR3 EVK as an Arduino shield with boards compatible with the Arduino UNO form factor. The example projects in this section use the CY8CKIT-042

PSoC 4 Pioneer Kit as the baseboard. You can mount the CY3280-MBR3 EVK directly on top of the

PSoC 4 Pioneer Kit, as displayed in Figure 5-20. The kit can be used with other Arduino boards in a similar fashion. To begin, configure your kit for

communication with the embedded host. On the CY3280-MBR3 EVK:

■ Change the jumper position on header J13 to connect pins J13-2 and J13-3.

■ Change the jumper position on header J14 to connect pins J14-2 and J14-3.

■ Change the jumper position of J15 to position A; see Figure 5-21.

Connect the two kits such that the USB ports of both kits align with each other. When the USB ports are aligned, the J1, J2, J3, and J4 headers on the PSoC 4 Pioneer Kit connect to J1, J2, J3, and J4 headers on the CY3280-MBR3 EVK.

Note: The J2 header on the PSoC 4 Pioneer Kit is a dual-row header and has three extra pins for which there are no corresponding pins on the CY3280-MBR3 EVK.

Figure 5-20. Final Mounted Kit

Configuration Files and Example Projects

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 62

Configuration Files and Example Projects

Figure 5-21. Jumper Location on the Kit

Two example projects showcase how to configure the MBR3 device and how to communicate with the device. To open these projects, you need PSoC Creator 3.0 or later. Download and install the software from www.cypress.com/PSoCCreator, if required.

To verify these projects, you need a PSoC 4 Pioneer Kit. See Running Configuration Files and Host Projects on page 51 for information on how to access the

example projects.

5.3.1 Host_LED_Toggle_Buzzer_PSoC4_Pioneer_Kit

5.3.1.1 Project Description

This example project uses PSoC 4 as the I2C master (host) to configure the CY8CMBR3116 device. This project shows how to write data to the CY8CMBR3116 device using I

In this project, PSoC 4 loads the 12 8-by te co nfigu ration data to th e MB R3 de vice u sing I nication. The 128-byte configuration data of the LED Toggle configuration is sent to the MBR3 device.

This project can be used to learn the process of configuring the device using an external host. See

Configuring the MBR3 Device From the PSoC 4 Pioneer Kit on page 72 for details

C communication lines.

C commu-

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 63

Figure 5-22. PSoC Creator Schematic

Configuration Files and Example Projects

5.3.1.2 Hardware Connections

Connect the CY3280-MBR3 EVK to the PSoC 4 Pioneer Kit, as discussed in PSoC 4 Host Example

Projects on page 62.

Ensure that the jumper J15 is connected in position A (see Figure 5-21). Table 5-2 shows the pin connections used for I CY8CMBR3116 device I

Table 5-2. Pin Connections

Component Pin Name Port Pin Used

I2C – SCL P4[0]

I2C – SDA P4[1]

Blue LED P0[3]

Red LED P1[6]

Ensure that I

C selection jumpers J13 and J14 are shorted on pins 2 and 3 , as shown in Figure 5-21.

C communication; the corresponding pins of the EVK are connected to the

C pins.

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5.3.1.3 Flow Chart

Start

Initialize I2C Master

component

Configure and load

toggle and buzzer

feature to MBR3

Configuration was

loaded to MBR3

successfully?

MBR3 drives the

LEDs and

buzzer on touch

Yes

The RGB LED on

CY8CKIT-042 blinks

continuously indicating

I2C write error

Figure 5-23 shows the flow chart of the code implemented in main.c.

Figure 5-23. Project Flow Chart

Configuration Files and Example Projects

5.3.1.4 Build and Program the PSoC 4 Project

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 65

Follow these steps to open and program code examples:

1. Launch PSoC Creator 3.0 (or later) from the Start menu.

2. Open the Host_LED_Toggle_Buzzer_PSoC4_Pioneer_Kit.cywrk workspace by choosing File > Open > Project/Workspace and navigating to the directory in which your project was saved, as shown in Figure 5-24.

Figure 5-24. Navigating to the Project

3. Build the code example by choosing Build > Build <Project name> or by selecting Build <proj-

ect name> in the menu options obtained by right-clicking on the project name in the Workspace Explorer to generate the hex file (see Figure 5-25).

Configuration Files and Example Projects

Figure 5-25. Building the Project from PSoC Creator

4. To program, connect the PSoC 4 Pioneer Kit to a computer using the USB cable connected to the USB port/J10 of the PSoC 4 Pioneer Kit.

5. Choose Debug > Program in PSoC Creator (see Figure 5-26).

Figure 5-26. Programming the Device from PSoC Creator

6. The CY8CKIT -042 is detected as "KitProg/<Kit numbe r>” and is seen in the Select Debu g Target window. If the PSoC 4 device is not yet acquired, PSoC Creator opens the Programming window. Select the KitProg and click the Port Acquire button (see Figure 5-27).

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 66

Figure 5-27. Acquiring the Device from PSoC Creator

Configuration Files and Example Projects

7. After the device is acquired, it is shown in a tree structure below the KitProg. Click the Connect button (see Figure 5-28).

Figure 5-28. Connecting the Device from PSoC Creator

8. Click OK to exit the window and start programming.

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5.3.1.5 Verify Output

Configuration Files and Example Projects

Ensure that the EVK is connected to the PSoC 4 Pioneer Kit. Touch any CapSense button on the kit; the corresponding LED toggles, with audio feedback through the buzzer (see Figure 5-29). If an I write error occurs while loading the co nfigura tion to t he MBR3 de vice, the RG B LED on the PSoC 4 Pioneer Kit blinks in blue continuously indicating an I

C write error.

Figure 5-29. Verify Output

5.3.2 Host_Interrupt_LED_ON_Time_PSoC4_Pioneer_Kit

5.3.2.1 Project Description

This example project uses PSoC 4 as the I2C master (host) to implement the LED-on time feature on the CY3280-MBR3 EVK using the host interrupt and host-controlled GPOs feature. This project also shows how to read the status register of the de vice with an I device.

In this project, PSoC 4 loads the following configuration:

■ Four button sensors enabled

■ Host interrupt enabled

■ Host-controlled GPOs

On every touch and release, the device issues a host interrupt (active-low pulse of 250-µs duration) to the PSoC 4 Pioneer Kit. Upon receipt of the interrupt, PSoC 4 sends an I read the button status register (0xAA-0xAB). Depending upon the content of the register, PSoC 4 controls the onboard RGB LED. See Table 5-4 for the expected RGB output. Also, it detects if the host interrupt was generated because of a touch or a release. If a button is released, the corresponding RGB LED keeps glowing for one second before going off. This is implemented using the counter (TCPWM component) available in PSoC 4.

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C master upon an interrupt from the

C read command to

Figure 5-30. PSoC Creator Schematic

Configuration Files and Example Projects

5.3.2.2 Hardware Connections

Connect the CY3280-MBR3 EVK to the PSoC 4 Pioneer Kit, as shown in Figure 5-20. Ensure that the jumper J15 is connected in position A (see Figure 5-21). No specific hardware connection is required for this project because all connections are hard wired.

Table 5-3 lists the pin connections used for I

are connected to the CY8CMBR3116 device I Table 5-3. Pin Connections

Component Pin Name Port Pin Used

HostInt_Pin P0[7]

I2C – SCL P4[0]

I2C – SDA P4[1]

Red_LED P1[6]

Green_LED P0[2]

Blue_LED P0[3]

C communication; the corresponding pin s of the EVK

C pins.

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5.3.2.3 Flow Chart



Start

Initialize the components (TCPWM,

I2C Master, Interrupt)

Configure the MBR3 device for 4 buttons and to

generate host interrupt

Check if any LED on-time

counter is greater than 0

Check if host interrupt occured

Read buttons status

Check the reason for

interrupt

Turn on the corresponding RGB LED and the LED on

the MBR3 kit

Yes

Check if timer flag is set

Yes

Touch

Turn off the LED for which

on-time is elapsed

Decrement LED on-time coun ter

Check if LED on-time

counter equals 0

Yes

Set LED on-time

counter

Release

Figure 5-31 shows the flow chart of the code implemented in main.c.

Figure 5-31. Project Flow Chart

Configuration Files and Example Projects

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5.3.2.4 Build and Program the PSoC 4 Project

Follow these steps to open and program code examples:

1. Launch PSoC Creator 3.0 (or later) from the Start menu.

2. Open the Host_Interrupt_LED_ON_Time_PSoC4_Pioneer_Kit.cywrk workspace by choosing File > Open > Project/Workspace and navigating to the directory in which your project was saved, as shown in Figure 5-24.

3. Follow steps 3 to 8 as described in Build and Program the PSoC 4 Project on page 71 to continue.

5.3.2.5 Verify Output

Ensure that the EVK is connected to the PSoC 4 Pioneer Kit. Touch a CapSense button. Observe that the corresponding LED on the CY3280-MBR3 EVK turns on; the RGB LED also turns on based on the button touched according to Table 5-4. Remove the finger from the CapSense button. Observe that the corresponding LED on the CY3280-MBR3 EVK turns off immediately but the RGB LED turns off one second after removing the finger (see Figure 5-32).

Table 5-4. RGB LED Mapping on PSoC 4 Pioneer Kit with Button Sensors on CY3280-MBR3 EVK

Button Sensor Touched LED Connection on PSoC 4 Pioneer Kit

BTN1 Green LED BTN2 Red LED BTN3 Blue LED BTN4 All three LEDs on

Configuration Files and Example Projects

Note: When BTN4 is touched, all three LEDs turn on; this is the expected RGB output. Therefore, if any other button is touched along with BTN4, there will not be a visible change in the RGB output because all LEDs turn on when BTN4 is touched. Similarly, if any other button is touched along with BTN4, and BTN4 is released first, all three LEDs turn off after one second; this is the expected output. There will not be any RGB output for the button that is still being touched.

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 71

Figure 5-32. Verify Output

Configuration Files and Example Projects

5.3.3 Configuring the MBR3 Device From the PSoC 4 Pioneer Kit

The MBR3 device can be conf igured as required from an extern al host such as the CY8CKIT-042 PSoC 4 Pioneer Kit. This can be done using the configuration files generated by EZ-Click. Follow these steps to configure the MBR3 device from an external host:

1. Open the EZ-Click 2.0 customizer tool.

2. Create a new project and select the CY8CMBR3116 device in the Product Selector Guide.

3. Configure the features as needed, considering the kit pin mapping (see Pin Mapping Between

CY8CMBR3116 and CY3280-MBR3 EVK on page 34).

4. Generate the configuration file.

5. Navigate to the EZ-Click project directory and look for <file name>.h file inside the directory.

6. Open <file name>.h either from within PSoC Creator or using any text editor such as WordPad.

7. Copy and paste the contents of the 128-byte array CY8CMBR3116_configur ation[128] in <file name>.h to the configData array in the configuration.c file in the PSoC 4 project.

Note: The array is defined as "const" in the <file name>.h file; in the PSoC 4 project, it is a 128- byte array of unsigned char type.

Note: When configuring the MBR3 device from an exter nal host such as the PSoC 4 Pione er Kit, ensure that a blank configuration or a slave address of 0x00 is not sent to the device. If this happens, see Restoring to Factory Default Slave Address from 0x00 on page 78 to revert the kit back to factory default. The valid slave address for the MBR3 device is from 0x08–0x77.

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Configuration Files and Example Projects

Figure 5-33. Configuration.C File

8. Build the project (see steps 3 to 8 in Bu ild and Pr ogr am the PSoC 4 Pro ject on page 65) and pro- gram it on to the PSoC 4 Pioneer Kit; verify the functionality on the CY3280-MBR3 EVK.

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6. Advanced Topics

6.1 Using PSoC 5LP as USB-I2C Bridge

The PSoC 5LP on the CY3280-MBR3 EVK serves as a USB-I2C bridge, which can be used to communicate with USB-I installed along with PSoC Programmer during kit installation. BCP works with I bridges, which communicate with slave devices. This application currently supports CY3240, MiniProg3, FirstTouch, FirstTouchRF, True-TouchBridge, DVKProg1, and KitProg bridges.

The following steps describe how to use the USB-I and CY8CMBR3116 device.

1. Open BCP from Start > All Programs > Cypress > Bridge Control Panel <version number>.

2. Connect the CY3280-MBR3 EVK to your PC via a USB port using the USB cable.

3. Ensure that the I

C communication between PSoC 5LP and the MBR3 device. Connect jumper J15 in setting C,

as shown in Figure 5-1.

4. Select the KitProg in the BCP to use the USB-I ‘Connected’ and ‘Powered’ tabs turn green, as shown in Figure 6-1.

Figure 6-1. KitProg USB-I

C software such as Bridge Control Panel. Bridge Control Panel (BCP) is

C bridge, which can communicate between BCP

C selection jumpers J13 and J14 are shorted between pins 1 and 2 to enable

C functionality. On successful connection, the

C Connected in Bridge Control Panel

C, SPI, and RX8

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Advanced Topics

5. The EZ-Click customizer tool generates an IIC file, which can be used in the BCP software. Click File > Open File and navigate to the EZ-Click project directory in <Install_Directory>\CY3280-MBR3 EVK\<version>\Firmware\Config Files\ and open the required project and select the IIC file.

Figure 6-2. Opening IIC File

Figure 6-3. LED Toggle.iic File

Note: The location of the LED Toggle.iic file is shown as reference. Any IIC file can be used.

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Advanced Topics

6. The MBR3 device is in a deep-sleep state until a CapSense or I2C activity occurs. When receiving an I sleep. This I pliant devices on the bus. An I resend the I

C command while in deep sleep, MBR3 will NACK the request and begin to wake from

C approach is in lieu of I2C clock stretching, which may corrupt non-stretching com-

C command until the MBR3 device wakes and acknowledges. Two dummy write

C command sent from BCP may not be acknowledged. Therefore,

operations to the MBR3 device are sufficient before sending the 128-byte configuration. To send a dummy write, edit each write command in the IIC file with the prefix “w 37 0 p w 37 0 p”.

7. From the BCP, transfer the 128-byte configuration data to the MBR3 device; to do this, place the cursor on the command to be sent to the MBR3 device and click the Send button on the GUI or press the Enter key on your keyboard. The log shows if the transaction is a success or failure. A “+” after each byte indicates that the transaction is a success and a “–” indicates that it is a fa ilure (see Figure 6-4).

8. Send both I

C commands in the IIC file to see the configuration in effect on the CY3280-MBR3

kit.

9. Press the reset switch, SW2, on the kit. The configuration specified by 128 bytes in the first command will take effect.

Note: See LED To gg le on page 52 for more details and expected output of the LED Toggle con- figuration.

Figure 6-4. Writing to I

C Slave in BCP

10.Read five bytes of data from the register offset address 0x00 of the MBR3 device. The log shows if the transaction is a success or a failure.

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 76

Figure 6-5. Reading from I2C Slave in BCP

Advanced Topics

The command format to communicate with this kit using the BCP is as follows:

■ Write data command format: To write ‘N’ bytes of data after the register offset address, use this

format to send data.

w Slave address Register offset Data to write (N bytes) p

■ Read data command format: To read ‘N’ bytes of data beginning with the register offset address,

use this format to receive data.

w Slave address Register offset r Slave address

write ‘N’ number of x’s with

spaces

Notes:

■ The Write/Read transaction with an MBR3 device requires specifying an offset address to the

MBR3 device from which the data reading/writing should start. The MBR3 device automatically increments the register address for every byte after the offset address. Therefore, a Read/Write transaction with an MBR3 device start s with an I

C write operation to specify the register of fset to

the MBR3 device.

■ All bytes in the IIC file are in hex format.

The status box below the editor window shows the offset register content, where:

■ w – Write command.

■ Address – Slave device address (in hex). Default address for the device on this kit is 0x37.

■ Register offset – Offset address of the confi guration register you want to wr ite. See the datasheet

for the list of registers and their offset addresses.

■ Data – Write ‘N’ byte data here to write sequentially beginning with the offset address.

■ r – Read command.

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 77

■ x – Reserved symbol. Each ‘x’ in the command signifies that 1 byte of data should be read.

■ p – Stop command

6.2 Restoring to Factory Default Slave Address from 0x00

When configuring the MBR3 device from an external host such as the CY8CKIT-042 PSoC 4 Pioneer Kit, ensure that either a blank configuration (128 bytes of 0x00) or a slave address of 0x00 is not programmed into the MBR3 silicon. The valid slave address for MBR3 is 0x08–0x77 (8–119).

If a slave address is configured to the MBR3 device, the kit becomes unusable because it cannot be reconfigured from the EZ-Click customizer tool. In such a situation, follow these steps to restore the slave address to the default slave address 0x37.

1. Disconnect the CY3280-MBR3 kit from the external host or CY8CKIT-042.

2. Change the I

3. Change the J15 setting to setting C.

4. Launch BCP, as explained in steps 1 to 4 in 6.1 Using PSoC 5LP as USB-I2C Bridge.

5. Click File > Open and navigate to the Water Tolerance configuration project directory and open Water Tolerance.iic in BCP.

6. Change "37" next to w to "00" in both the IIC commands. Also, edit the IIC commands with dummy write operations and send the configuration to the MBR3 device, as explained in step 6 of

Using PSoC 5LP as USB-I2C Bridge on page 74.

C selection jumpers J13 and J14 in positions 1 and 2.

Advanced Topics

Figure 6-6. Restore Factory Default Slave Address in BCP

7. Both the I ACK'ed (acknowledged). If any I

C commands are sent one after another. Ensure that all bytes of the I2C command are

C command is NACK'ed (not acknowledged), send the I2C

commands again. See Figure 6-4 for ACK and NACK indications.

8. After both the commands are successfully sent to the MBR3 de vice, that is, all bytes are ACK'ed, press the reset switch (SW2) on the CY3280-MBR3 EVK.

9. The kit will become operational again and exhibit the "Water Tolerance" output. Refer to Water

Tolerance on page 58. The kit will also be recognized with the slave ID of 0x37 in EZ-Click.

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 78

A. Appendix



A.1 Schematic

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 79

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 80

No Load

P5LP_XRES

P5LP3_1

P5LP2_4

P5LP_VDD

VTARG

1206R

D15

Status LED Green

2 1

0603

R83

4.7K

0805

R62

330 ohm

0402

C35 100 pF

0603

R41

4.7K

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 81

VCCD

NOTE: Keep VCCD and CMOD cap near U2. And keep the CMOD Cap Trace thick like power Trace

NOTE: Load R84 and R85 only during 1.8V externally regulated mode of operation. WARNING: When R84 is loaded DO NOT operate the kit at any voltage more than 1.8V i.e. 3.3V or 5V.Otherwise the CY8CMBR3116 silicon will get damaged.

PS1

CS3

CMOD

VCCD

HI/SHIELD

LED4

LED3

LED2

LED1

CS10

CS9

PROX_LED

CS6

XRES

PS0

CS5

CS4

CS7

CS2/GUARD

SCL

SDA

HI/BUZ

VDD VCCD

VDD

P5LP12_4

0402

R74

560 ohm

0402

R52

560 ohm

0402

R49

560 ohm

0402

R80330 ohm

0402

R81330 ohm

0402

R50

560 ohm

CY8CMBR3116

CS0/PS0

CS1/PS1

CS2/GUARD

CS3

CMOD

VCCD

VDD7VSS8CS15/SH/HI9CS14/ GPO610CS13/ GPO511CS12/ GPO4

CS11/ GPO3

CS10/ GPO2

CS9/ GPO1

CS8/ GPO0

CS7

CS6

CS5

CS4

I2C SDA

I2C SCL

HI/ BUZ/ GPO7

XRES

EPAD

0402

R76

560 ohm

0402

0.1 uF

0402

C30

0.1 uF

0402

R51

560 ohm

0402

R75

560 ohm

0805

R84

ZERO No Load

0402

R78

560 ohm

0603

C33

1.0 uF

0805

R56

ZERO

0402

R77

560 ohm

0402

R79

560 ohm

TP6

C26

2.2nF

No Load

GND Test Point

NOTE: DO NOT POWER FROM J12 JUMPER

External Pull Up for XRES and HOST Interrupt pin of CY8CMBR3116

J12 is shorted By Default

J12 for Current Measurement

CY8CMBR3116 Reset Switch

XRES

VDDVADJ

VADJ

HOST_INT

J12 2 PIN HDR

112

0402

C34 100 pF

TP7 BLACK

SW2

RS-022R05C1-PA

1 2

0805

R48

ZERO No load

0603

R73

4.7K

0603

R57

4.7K

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 82

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 83

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 84

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 85

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 86

A.2 Pin Assignment Table

Pin No. Pin Name Type Description Usage

1 CS0/PS0 I/O

2 CS1/PS1 I/O

3 CS2/GUARD I/O

4 CS3 I/O CapSense button controls GPO3 BTN1 (10-mm diameter).

CapSense button/proximity sensor, controls GPO0

CapSense button/proximity sensor, controls GPO1

CapSense button/guard sensor, controls GPO2

Proximity loop. Brought out to dual header through a 560-ohm

resistor. Brought out to dual header through a 560-ohm

resistor.

5 CMOD I/O 6 VCCD Power Power. Connect 0.1-uF capacitor Bypass capacitor of 0.1 uF.

7 VDD Power Power VADJ= 5 V, 3.3 V, or 1.8 V. 8 VSS Power Ground GND

9 CS15/SH/HI I/O

10 CS14/GPO6 I/O CapSense button/general-purpose output LED 4 for button 4 (BTN4). 11 CS13/GPO5 I/O CapSense button/general-purpose output LED 3 for button 3 (BTN3). 12 CS12/GPO4 I/O CapSense button/general-purpose output LED 2 for button 2 (BTN2). 13 CS11/GPO3 I/O CapSense button/general-purpose output LED 1 for button 1 (BTN1).

14 CS10/GPO2 I/O CapSense button/general-purpose output

15 CS9/GPO1 I/O CapSense button/general-purpose output 16 CS8/GPO0 I/O CapSense button/general-purpose output Proximity LED.

17 CS7 I/O CapSense button, controls GPO7

18 CS6 I/O CapSense button, controls GPO6 19 CS5 I/O CapSense button, controls GPO5 BTN3 (11-mm diameter).

20 CS4 I/O CapSense button, controls GPO4

21 I2C SDA

22 I2C SCL

23 HI/BUZ/GPO7 O

24 XRES XRES External reset

External modulator capacitor. Connect 2.2-nF capacitor

CapSense button/shield electrode/host interrupt/buzzer output

C data

C clock

Host interrupt/buzzer output/general-purpose output

2.2 nF Cmod capacitor (COG type).

This pin will be connected to a 6-pin jumper to select between Hash GND for water proofing or host interrupt.

Brought out to dual header through a 560-ohm resistor.

Cannot be used because GPO7 is multiplexed with the host interrupt so brought out to a header.

BTN4 (11-mm diameter): A long trace option will be provided on this pin.

BTN2 (10-mm diameter): Button 2 will have a slide switch, which varies the Cp to 10 pF or 15 pF, depending on the position of the switch.

This pin will be connected to a 3-pin jumper, to choose between the onboard I2C-USB bridge or

external host. This pin will be connected to a 3-pin jumper, to

choose between the onboard I2C-USB bridge or external host.

This pin will be connected to a 6-pin jumper to select the host interrupt or buzzer.

Reset switch and an SIO pin on PSoC 5LP I bridge.

C-USB

Note: Pins shaded blue are left open; the other pins have been used for some function.

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 87

A.3 Bill of Materials

Item Qty Reference Description Manufacturer Manufacturer Part No.

2 1 C4 CAP TANT 10UF 16V 10% 1206 AVX TAJA106K016R 3 1 C5 CAP CER 22UF 10V 20% JB 0805 TDK Corporation C2012JB1A226M125AB

5 1 C16 CAP 10000PF 16V CERAMIC 0402 SMD TDK Corporation C1005X7R1C103K050BA 6 1 C26 CAP, CER, 2200pF, 50V, 5%, C0G, 0805 Murata GRM2165C1H222JA01D 7 1 C31 CAP CER 15PF 50V 5% NP0 0603 TDK Corporation C1608C0G1H150J080AA

8 1 C32 CAP CER 10PF 50V 5% NP0 0603 9 1 C34 CAP CER 100PF 50V 5% NP0 0402 TDK Corporation C1005C0G1H101J050BA

10 1 D2 DIO , SCHOTTKY, 20V, 0.5A, SOD-123 Fairchild Semiconductor MBR0520L 11 3 D6,D7,D8 DIO, SUPPRESSOR ESD 5VDC 0603 SMD Bourns Inc. CG0603MLC-05LE

12 6

13 1 D15 LED GREEN CLEAR 1206 REAR MNT SMD Lite-On Inc LTST-C230GKT

14 7

15 2 R80,R81 RES 330 OHM 1/10W 5% 0402 SMD

16 10

17 4 R5,R45,R67,R56 RES 0.0 OHM 1/8W 0805 SMD Panasonic-ECG ERJ-6GEY0R00V 18 1 R82 RES 0.0 OHM .125W JUMP 0402 SMD Vishay Dale CRCW04020000Z0EDHP

19 1 R60 RES 0.0 OHM 1/10W JUMP 0603 SMD

20 2 R8,R9 RES 2.2K OHM 1/10W 5% 0603 SMD

21 1 R13 RES 100K OHM 1/10W 5% 0402 SMD

22 2 R26,R27 RES 22 OHM 1/10W 1% 0603 SMD

23 3 R37,R39,R70 RES 15K OHM 1/10W 5% 0603 SMD

24 2 R73, R83 RES 4.7K OHM 1/10W 5% 0603 SMD 25 2 R43,R68 RES, 10K OHM, 1/16W, 1%, 0603, SMD Yageo RC0603FR-0710KL 26 4 R38,R40,R46,R69 RES 30K OHM 1/10W 1% 0603 SMD 27 1 R44 RES 37.4K OHM 1/10W .5% 0603 SMD Yageo RT0603DRD0737K4L 28 1 R47 RES 5.49K OHM 1/10W 1% 0603 SMD

29 1 LS1 BUZZER PIEZO 4KHZ 12.2MM PC MNT

C11,C13,C18,C19,C 23,C33

C7,C12,C14,C15,C1 7,C20,C21,C24,C30

D9,D10,D11,D12,D1 3,D14

R29,R30,R31,R32,R 58,R59, R62

R49,R50,R51,R52, R74,R75,R76,R77,R 78,R79

CAP CER 1UF 10V 10% X5R 0603 TDK Corporation C1608X5R1A105K080AC

CAP CER 0.1UF 10V 10% X5R 0402 Taiyo Yuden LMK105BJ104KV-F

Samsung ElectroMechanics America, Inc

LED Red CLEAR 1206 REAR MNT SMD Stanley Electric Co BR1111R-TR

RES 330 OHM 1/8W 5% 0805 SMD Panasonic ERJ-6GEYJ331V

Panasonic Electronic Components

RES 560 OHM 1/16W 5% 0402 SMD Yageo Corporation RC0402JR-07560RL

Panasonic Electronic Components

TDK CORPORATION (VA)

CL10C100JB8NNNC

ERJ-2GEJ331X

ERJ-3GEY0R00V

ERJ-3GEYJ222V

ERJ-2GEJ104X

ERJ-3EKF22R0V

ERJ-3GEYJ153V

ERJ-3GEYJ472V

ERJ-3EKF3002V

ERJ-3EKF5491V

PS1240P02BT

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 88

Item Qty Reference Description Manufacturer Manufacturer Part No.

30 1 F1 PTC Resettable Fuses 15Volts 100Amps Bourns MF-MSMF050-2 31 2 J13,J14

32 2 J1,J4

33 1 J2

34 1 J3

35 2 J11,J12 36 1 J15 CONN, HEADER, VERT, SGL, 6POS, GOLD PROTECTRON P9101-06-12-1

37 1 J10 MINI USB RCPT R/A DIP TE Connectivity 1734510-1 38 1 SW1 SWITCH SLIDE SP3T LOW PROF SMD Copal Electronics Inc CUS-13TB 39 1 SW2 SWITCH TACTILE SPST-NO 0.05A 12V TE Connectivity FSMRA5JH 40 1 SW3 SWITCH SLIDE DPDT LOW PROF SMD Copal Electronics Inc CUS-22TB 41 1 TP7 TP, PC Mini, 0.040" D Black Keystone Electronics 5001 42 1 U2 IC REG LDO ADJ 0.5A SOT23-5 Micrel Inc MIC5219YM5 TR 43 1 U4 POLYZEN 5.6V PPTC/ZENER SMD TE Connectivity ZEN056V075A48LS 44 1 U1 CY8C5868LTI-LP039, QFN68 Cypress SemiConductor CY8C5868LTI-LP039 45 1 U3 CY8CMBR3116 -LQXI, 24QFN Cypress SemiConductor CY8CMBR3116 -LQXI

46 1 PCB

No Load Components

HDR, CONN, HEADER, MALE, 2.54mm, 3POS, GOLD, TH

2.54mm PITCH SINGLE ROW 8POS HEADER, 13mm MATING LENGTH

2.54mm PITCH SINGLE ROW 6POS HEADER, 13mm MATING LENGTH

2.54mm PITCH SINGLE ROW 10POS HEADER, 13mm MATING LENGTH

CONN, HEADER, VERT, SGL ROW, 2POS, GOLD

CY3280-MBR3 PCB (Size: 3 inch x 2.7 inch No of Layers: 4 Impedance Control USB Line Surface Finish: ENIG Solder Mask color: Black Board thickness: 1.6mm)

PROTECTRON P9101-03-12-1

PROTECTRON P9101-08-D32-1

PROTECTRON P9101-06-D32-1

PROTECTRON P9101-10-D32-1

PROTECTRON P9101-02-12-1

Cypress SemiConductor 600-60172-01 Rev 1

2 1 R53 RES, 10K OHM, 1/16W, 1%, 0603, SMD Yageo RC0603FR-0710KL 3 2 R41,R57 RES 4.7K OHM 1/10W 5% 0603 SMD Panasonic-ECG ERJ-3GEYJ472V 4 1 C35 CAP CER 100PF 50V 5% NP0 0402 TDK Corporation C1005C0G1H101J050BA 5 3 TP2,TP3,TP4 TP, PC Mini, 0.040" D Red Keystone Electronics 5000 6 1 TP5 TP, PC Mini, 0.040" D Black Keystone Electronics 5001

R48, R54,R55,R63, R66,R71,R72,R84,R85RES 0.0 OHM 1/8W 0805 SMD Panasonic-ECG ERJ-6GEY0R00V

A.4 Regulatory Compliance Information

The CY3280-MBR3 EVK has been tested and verified to comply with the following electromagnetic compatibility (EMC) regulations.

■ EN 55022:2010 Class A – Emissions

■ EN 55024:2010 - Immunity

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 89

Revision History

CY3280-MBR3 Evaluation Kit User Guide Revision History

Document Title: CY3280-MBR3 Evaluation Kit User Guide Document Number: 001-89905

Revision Issue Date

** 02/18/2014 SASH New kit guide *A 02/21/2014 SASH Updated EZ-Click images *B 03/10/2014 PAVA Updates to include support for externally regulated operating mode at 1.8 V

Origin of

Change

Description of Change

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 90

Cypress Semiconductor CY3280-MBR3 User Guide

Specifications and Main Features

Frequently Asked Questions

User Manual

CY3280-MBR3 Evaluation Kit User Guide

Contents

Safety Information

Regulatory Compliance

General Safety Instructions

1. Introduction

1.1 Kit Contents

1.2 Getting Started

1.3 Factory Default Configuration

1.4 Additional Learning Resources

1.5 Technical Support

1.6 Acronyms

1.7 Document Conventions

2. Kit Installation

2.1 Before You Begin

2.2 CY3280-MBR3 EVK Software

2.3 Install the Software

2.4 Uninstall the Software

3. Kit Operation

3.1 Powering the Kit

3.2 Communication Between PC Host and Kit

3.3 Configuring the CY8CMBR3116 Controller Using EZ-Click 2.0

3.4 Kit Features

3.4.1 SmartSense Auto-Tuning Feature

4. Hardware

4.1 Board Details

4.2 Theory of Operation

4.3 Functional Description

4.3.1 CY8CMBR3116 CapSense Controller

4.3.1.1 Pin Mapping Between CY8CMBR3116 and CY3280-MBR3 EVK

4.3.2 PSoC 5LP

4.3.3 Power Supply System

4.3.3.1 Externally Regulated Operation Mode

4.3.3.2 Protection Circuit

4.3.3.3 Procedure to Measure the CY8CMBR3116 Current Consumption

4.3.4 Button Sensors and Proximity Loop Sensor

4.3.5 CY3280-MBR3 Kit LEDs

4.3.6 Buzzer, Shield, and Host Interrupt Multiplexing Jumper

4.3.7 Capacitance Variation Demonstration

4.3.8 Arduino-Compatible Headers

4.3.9 Push Button to Reset CY8CMBR3116

4.3.10 I2C Selection Jumpers

5. Configuration Files and Example Projects

5.1 Running Configuration Files and Host Projects

5.2 Configuration Files

5.2.1 LED Toggle

5.2.1.1 Loading LED Toggle Configuration

5.2.2 Proximity Detection

5.2.2.1 Loading Proximity Detection Configuration

5.2.3 Water Tolerance

5.2.3.1 Loading Water Tolerance Configuration

5.3 PSoC 4 Host Example Projects

5.3.1 Host_LED_Toggle_Buzzer_PSoC4_Pioneer_Kit

5.3.1.1 Project Description

5.3.1.2 Hardware Connections

5.3.1.3 Flow Chart

5.3.1.4 Build and Program the PSoC 4 Project

5.3.1.5 Verify Output

5.3.2 Host_Interrupt_LED_ON_Time_PSoC4_Pioneer_Kit

5.3.2.1 Project Description

5.3.2.2 Hardware Connections

5.3.2.3 Flow Chart

5.3.2.4 Build and Program the PSoC 4 Project

5.3.2.5 Verify Output

5.3.3 Configuring the MBR3 Device From the PSoC 4 Pioneer Kit

6. Advanced Topics

6.1 Using PSoC 5LP as USB-I2C Bridge

6.2 Restoring to Factory Default Slave Address from 0x00

A. Appendix

A.1 Schematic

A.2 Pin Assignment Table

A.3 Bill of Materials

A.4 Regulatory Compliance Information

Revision History