Cypress TrueTouch 单点触控控制器详解

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"Cypress CY8CTST242是一款由 Cypress Semiconductor Corporation 生产的TrueTouch™ 单触控屏控制器，适用于单触摸应用，能够支持多达33个X/Y传感器输入，适合尺寸5.6英寸及以下的屏幕。该芯片具有快速的扫描速率和高分辨率，同时具备低功耗特性，采用强大的哈佛架构处理器，并带有灵活的片上内存和全速USB功能。" Cypress CY8CTST242 是一款专为触摸屏设计的控制器，其主要特点和功能包括： 1. **TrueTouch™ 技术**：CY8CTST242基于TrueTouch™ 技术，这是一种电容式触摸屏控制器，专为单触摸应用设计，能够提供准确、灵敏的触控体验。 2. **传感器输入支持**：该芯片可支持最多33个X/Y传感器输入，这意味着它可以处理多点触控输入，尽管它主要针对单点触摸应用。 3. **屏幕尺寸兼容性**：CY8CTST242适合应用于5.6英寸或以下尺寸的屏幕，这使其适用于各种小型便携式设备，如智能手机和小型平板电脑。 4. **快速扫描速率**：其扫描速率相当快，典型值为每传感器400μs，对于10x15的面板，可以实现10毫秒的扫描速率，确保了触摸响应的即时性和流畅性。 5. **高分辨率**：在2.6英寸屏幕上，分辨率可达典型值320x240，而在3.5英寸屏幕上，可以达到480x360的分辨率，确保了显示的清晰度。 6. **低功耗设计**：CY8CTST242拥有低功耗TrueTouch™ 块，平均供应电流在8ms报告率下仅为2.5mA，在16ms报告率下降低至1.25mA，延长了设备的电池寿命。 7. **哈佛架构处理器**：内置M8C处理器，运行速度可达24MHz，工作电压范围从1.71V到5.5V，温度范围覆盖-40°C到+85°C，确保在不同环境下稳定工作。 8. **片上内存**：包括32KB的Flash程序存储，可进行50,000次擦写循环，以及2048字节的SRAM数据存储，支持部分Flash更新和灵活的保护模式。 9. **编程接口**：支持In-System Serial Programming (ISSP)，方便在系统内进行程序的更新和调试。 10. **全速USB功能**：集成了全速USB（12Mbps），提供8个单向数据端口，增强了设备连接和数据传输能力。 Cypress CY8CTST242 是一款高性能、低功耗的触控解决方案，适用于需要高质量触摸体验的移动设备和消费电子产品。其高效能和灵活性使得它在设计现代触摸屏设备时成为一个理想的选择。

CY8CTST200A

Document Number: 001-53728 Rev. *D Page 7 of 37

Designing with PSoC Designer

The development process for the PSoC device differs from that

of a traditional fixed function microprocessor. The configurable

analog and digital hardware blocks give the PSoC architecture a

unique flexibility that pays dividends in managing specification

change during development and by lowering inventory costs.

These configurable resources, called PSoC Blocks, have the

ability to implement a wide variety of user-selectable functions.

The PSoC development process can be summarized in the

following four steps:

1. Select User Modules

2. Configure User Modules

3. Organize and Connect

4. Generate, Verify, and Debug

Select Components

PSoC Designer provides a library of pre-built, pre-tested

hardware peripheral components called "user modules." User

modules make selecting and implementing peripheral devices,

both analog and digital, simple.

Configure Components

Each of the User Modules you select establishes the basic

provide parameters and properties that allow you to tailor their

precise configuration to your particular application. For example,

a PWM User Module configures one or more

digital PSoC blocks, one for each 8 bits of resolution. The user

module parameters permit you to establish the pulse width and

duty cycle. Configure the parameters and properties to corre-

spond to your chosen application. Enter values directly or by

selecting values from drop-down menus. All the user modules

are documented in datasheets that may be viewed directly in

PSoC Designer or on the Cypress website. These user module

datasheets explain the internal operation of the User Module and

provide performance specifications. Each datasheet describes

the use of each user module parameter, and other information

you may need to successfully implement your design.

Organize and Connect

You build signal chains at the chip level by interconnecting user

modules to each other and the I/O pins. You perform the

selection, configuration, and routing so that you have complete

control over all on-chip resources.

Generate, Verify, and Debug

When you are ready to test the hardware configuration or move

on to developing code for the project, you perform the "Generate

Configuration Files" step. This causes PSoC Designer to

generate source code that automatically configures the device to

your specification and provides the software for the system. The

generated code provides application programming interfaces

(APIs) with high-level functions to control and respond to

hardware events at run time and interrupt service routines that

you can adapt as needed.

A complete code development environment allows you to

develop and customize your applications in C, assembly

language, or both.

The last step in the development process takes place inside

PSoC Designer's Debugger (access by clicking the Connect

icon). PSoC Designer downloads the HEX image to the ICE

where it runs at full speed. PSoC Designer debugging capabil-

ities rival those of systems costing many times more. In addition

to traditional single-step, run-to-breakpoint and watch-variable

features, the debug interface provides a large trace buffer and

allows you to define complex breakpoint events that include

monitoring address and data bus values, memory locations and

external signals

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