Cypress Semiconductor CY3280-MBR3 Manuale utente

CY3280-MBR3 Evaluation Kit User Guide

Doc. #: 001-89905 Rev. *G

Cypress Semiconductor

198 Champion Court

San Jose, CA 95134-1709

www.cypress.com

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

Copyrights

and its subsidiaries, including Spansion LLC (“Cypress”). This document, including any software or firmware included or refer-

enced in this document (“Software”), is owned by Cypress under the intellectual property laws and treaties of the United

States and other countries worldwide. Cypress reserves all rights under such laws and treaties and does not, except as spe-

cifically stated in this paragraph, grant any license under its patents, copyrights, trademarks, or other intellectual property

rights. If the Software is not accompanied by a license agreement and you do not otherwise have a written agreement with

Cypress governing the use of the Software, then Cypress hereby grants you a personal, non-exclusive, nontransferable

license (without the right to sublicense) (1) under its copyright rights in the Software (a) for Software provided in source code

form, to modify and reproduce the Software solely for use with Cypress hardware products, only internally within your organi-

zation, and (b) to distribute the Software in binary code form externally to end users (either directly or indirectly through

resellers and distributors), solely for use on Cypress hardware product units, and (2) under those claims of Cypress's patents

that are infringed by the Software (as provided by Cypress, unmodified) to make, use, distribute, and import the Software

solely for use with Cypress hardware products. Any other use, reproduction, modification, translation, or compilation of the

Software is prohibited.

TO THE EXTENT PERMITTED BY APPLICABLE LAW, CYPRESS MAKES NO WARRANTY OF ANY KIND, EXPRESS OR

IMPLIED, WITH REGARD TO THIS DOCUMENT OR ANY SOFTWARE OR ACCOMPANYING HARDWARE, INCLUDING,

BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PUR-

POSE. To the extent permitted by applicable law, Cypress reserves the right to make changes to this document without fur-

ther notice. Cypress does not assume any liability arising out of the application or use of any product or circuit described in

this document. Any information provided in this document, including any sample design information or programming code, is

provided only for reference purposes. It is the responsibility of the user of this document to properly design, program, and test

the functionality and safety of any application made of this information and any resulting product. Cypress products are not

designed, intended, or authorized for use as critical components in systems designed or intended for the operation of weap-

ons, weapons systems, nuclear installations, life-support devices or systems, other medical devices or systems (including

resuscitation equipment and surgical implants), pollution control or hazardous substances management, or other uses where

the failure of the device or system could cause personal injury, death, or property damage ("Unintended Uses"). A critical

component is any component of a device or system whose failure to perform can be reasonably expected to cause the failure

of the device or system, or to affect its safety or effectiveness. Cypress is not liable, in whole or in part, and you shall and

hereby do release Cypress from any claim, damage, or other liability arising from or related to all Unintended Uses of Cypress

products. You shall indemnify and hold Cypress harmless from and against all claims, costs, damages, and other liabilities,

including claims for personal injury or death, arising from or related to any Unintended Uses of Cypress products.

Cypress, the Cypress logo, Spansion, the Spansion logo, and combinations thereof, WICED, PSoC, CapSense, EZ-USB, F-

RAM, and Traveo are trademarks or registered trademarks of Cypress in the United States and other countries. For a more

complete list of Cypress trademarks, visit cypress.com. Other names and brands may be claimed as property of their respec-

tive owners.

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *G 3

Contents

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 ................................................................................................13

3. Kit Operation 14

3.1 Powering the Kit.........................................................................................................16

3.2 Communication Between PC Host and Kit ................................................................18

3.3 Configuring the CY8CMBR3116 Controller Using EZ-Click ......................................18

3.4 Kit Features ...............................................................................................................24

3.4.1 SmartSense Auto-Tuning Feature..................................................................24

4. Hardware 28

4.1 Board Details .............................................................................................................28

4.2 Theory of Operation...................................................................................................29

4.3 Functional Description ...............................................................................................29

4.3.1 CY8CMBR3116 CapSense Controller ...........................................................29

4.3.2 PSoC 5LP ......................................................................................................31

4.3.3 Power Supply System ....................................................................................32

4.3.4 Button Sensors and Proximity Loop Sensor .................................................38

4.3.5 CY3280-MBR3 Kit LEDs ................................................................................38

4.3.6 Buzzer, Shield, and Host Interrupt Multiplexing Jumper ................................39

4.3.7 Capacitance Variation Demonstration............................................................41

4.3.8 Arduino-Compatible Headers.........................................................................42

4.3.9 Push Button to Reset CY8CMBR3116...........................................................45

4.3.10 I2C Selection Jumpers ...................................................................................45

5. Configuration Files and Example Projects 46

5.1 Running Configuration Files and Host Projects .........................................................46

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *G 4

Contents

5.2 Configuration Files.....................................................................................................46

5.2.1 LED Toggle.....................................................................................................47

5.2.2 Proximity Detection ........................................................................................50

5.2.3 Water Tolerance .............................................................................................53

5.3 PSoC 4 Host Example Projects .................................................................................57

5.3.1 Host_LED_Toggle_Buzzer_PSoC4_Pioneer_Kit ...........................................58

5.3.2 Host_Interrupt_LED_ON_Time_PSoC4_Pioneer_Kit ....................................64

5.3.3 Configuring the MBR3 Device From the PSoC 4 Pioneer Kit ........................68

6. Advanced Topics 70

6.1 Using PSoC 5LP as USB-I2C Bridge ........................................................................70

6.2 Restoring to Factory Default Slave Address from 0x00.............................................74

6.3 Connecting External CapSense Sensors to the CY3280-MBR3 EVK .......................75

A. Appendix 76

A.1 Schematic ..................................................................................................................76

A.2 Pin Assignment Table................................................................................................84

A.3 Bill of Materials ..........................................................................................................85

A.4 Regulatory Compliance Information ..........................................................................86

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *G 5

Safety Information

Regulatory Compliance

The CY3280-MBR3 Evaluation Kit is intended for use as a development platform for hardware or

software in a laboratory environment. The board is an open system design, which does not include 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 operation 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.

The CY3280-MBR3 Evaluation Kit contains 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 recommended 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.

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

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.

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *G 7

1. Introduction

Thank you for your interest in the CY3280-MBR3 Evaluation Kit (EVK). This kit is designed to show-

case the abilities of the CY8CMBR3116 register-configurable CapSense®controller. It is also

designed as an Arduino™-compatible shield 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-I2C bridge to communi-

cate with the EZ-Click™ software 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 sensing to your user interface. See Configuring the

CY8CMBR3116 Controller Using EZ-Click on page 18 for information on how to configure a CY8CM-

BR3116 controller. CY3280-MBR3 offers the best features of Cypress’ CapSense 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 manufacturing 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 cus-

tomers 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 fol-

lowing operational states: Boot, Active, Look-for-Touch, Look-for-Proximity, Deep Sleep, and Config-

uration. The CY8CMBR3xxx controllers automatically manage transitions between the four states.

The Look-for-Proximity state allows ultra-low power consumption when a human body is not in close

proximity. This state is entered only if the wake-on-approach feature is enabled (and toggle is dis-

abled) in the MBR3 register configuration, which can be done using EZ-Click. Refer to the MBR3

device datasheet for more details on the CY8CMBR3xxx family of CapSense controllers.

The kit package includes EZ-Click, which is required to configure the kit. For more information and to

download the tool, visit the EZ-Click webpage.

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *G 8

Introduction

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

Inspect the contents of the kit. If you find any part missing, contact your nearest Cypress 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 14

explains how to configure the CY8CMBR3116 controller on the kit to test different features using

EZ-Click. 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 Cre-

ator™, respectively. The Advanced Topics chapter on page 70 describes how to use the Bridge Con-

trol Panel (BCP) to configure the MBR3 device. The Appendix on page 76 provides the schematics,

board layout, pin assignment, and the bill of materials (BOM).

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *G 9

Introduction

1.3 Factory Default Configuration

The kit installation folder includes three configuration files that demonstrate several features of the

CY8CMBR3116 CapSense controller. See Configuration Files on page 46 for more details. The

CY3280-MBR3 EVK is configured with the Water Tolerance configuration by default. In this configu-

ration, 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 more details on configuring the MBR3 device, refer to the EZ-Click User Guide, available

at <Install_Directory>\EZ-Click\<version>\Documentation.

1.4 Additional Learning Resources

Visit the CY8CMBR3116 CapSense Controller page for additional learning resources.

Visit the CY8CMBR3xxx CapSense Design Guide page for additional Host API-based demo

projects.

Visit the CapSense Code Examples page for the list of code examples using CapSense controllers.

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).

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/I2Cinter-integrated circuit

LED light-emitting diode

MBR mechanical button replacement

NC not connected

PC personal computer

PCB printed circuit board

PSoC®Programmable System-On-Chip

SNR signal-to-noise ratio

UART universal asynchronous receiver/transmitter

USB universal serial bus

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *G 10

Introduction

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.

Indice

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