TMS320x2833x/2823x I2C模块详解与操作指南

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本指南详细介绍了TMS320x2833x和2823x设备上集成的I2C模块，它是基于Philips Semiconductors（现为NXP Semiconductors）I2C-bus规范版本2.1的接口。这份文档假设读者已经熟悉了I2C-bus标准，以便于理解I2C模块的工作原理和特性。 I2C模块是Type 0类型，具有以下关键特性： 1. **功能与操作**：文档涵盖了I2C模块的基本功能，包括数据传输、启动和停止条件、时钟同步、仲裁以及中断请求。这些功能使得设备能够与其他I2C兼容设备通过I2C总线进行通信。 2. **电压等级和数据有效性**：手册强调了输入和输出电压水平的处理，以及确保数据在传输过程中的正确性和完整性。 3. **工作模式**：提供了I2C模块的不同工作模式，如主设备模式、从设备模式和快速模式等，以适应不同的通信需求。 4. **时钟生成**：模块内部时钟管理对于维持I2C通信的稳定至关重要，它可能包括时钟分频器和同步机制。 5. **中断请求**：文档详细描述了由I2C模块产生的中断，包括基本的I2C中断请求和基于FIFO的中断，这对于处理数据传输和错误检测非常重要。 6. **控制和状态寄存器**：提供了I2C模式寄存器（I2CMDR）、扩展模式寄存器（I2CEMDR）、中断使能寄存器（I2CIER）、状态寄存器（I2CSTR）和中断源寄存器（I2CISRC），这些都是用户配置和监控I2C通信的关键部件。 7. **复位与禁用**：指南还讨论了如何安全地重置或禁用I2C模块，以维护系统的正常运行和故障管理。 8. **兼容性**：指南提醒读者检查TMS320x28xx和28xxx系列DSP的其他设备，以了解不同I2C模块类型的差异，以及特定设备内的定制功能。通过阅读这份参考手册，用户可以全面了解TMS320x2833x和2823x设备上集成I2C模块的详细操作和配置方法，这对于开发基于这些处理器的I2C通信系统至关重要。

Preface

SPRUG03B– August 2008– Revised June 2011

Read This First

About This Manual

This manual describes the features and operation of the inter-integrated circuit (I2C) module that is

available on the TMS320x2833x, 2823 device . The I2C module provides an interface between one of

these 28x devices and devices compliant with Philips Semiconductors Inter-IC bus (I2C-bus) specification

version 2.1 and connected by way of an I2C-bus. This manual assumes the reader has familiarity with the

I2C-bus specification.

The I2C module described in this reference guide is a Type 0 I2C. See the TMS320x28xx, 28xxx DSP

Peripheral Reference Guide (SPRU566) for a list of all devices with an I2C module of the same type, to

determine the differences between types, and for a list of device-specific differences within a type.

Notational Conventions

This document uses the following conventions.

• Hexadecimal numbers are shown with the suffix h. For example, the following number is 40

hexadecimal (decimal 64): 40h.

• Registers in this document are shown in figures and described in tables.

– Each register figure shows a rectangle divided into fields that represent the fields of the register.

Each field is labeled with its bit name, its beginning and ending bit numbers above, and its

read/write properties below. A legend explains the notation used for the properties.

– Reserved bits in a register figure designate a bit that is used for future device expansion.

Related Documentation From Texas Instruments

The following documents describe the C28x™ devices and related support tools. Copies of these

documents are available on the Internet at www.ti.com. Tip: Enter the literature number in the search box

provided at www.ti.com.

Data Manual and Errata—

SPRS439 — TMS320F28335, TMS320F28334, TMS320F28332, TMS320F28235, TMS320F28234,

TMS320F28232 Digital Signal Controllers (DSCs) Data Manual contains the pinout, signal

descriptions, as well as electrical and timing specifications for the F2833x/2823x devices.

SPRZ272 — TMS320F28335, TMS320F28334, TMS320F28332, TMS320F28235, TMS320F28234,

TMS320F28232 DSC Silicon Errata describes the advisories and usage notes for different

versions of silicon.

CPU User's Guides—

SPRU430 — TMS320C28x CPU and Instruction Set Reference Guide describes the central processing

unit (CPU) and the assembly language instructions of the TMS320C28x fixed-point digital signal

processors (devices). It also describes emulation features available on these devices.

SPRUEO2 — TMS320C28x Floating Point Unit and Instruction Set Reference Guide describes the

floating-point unit and includes the instructions for the FPU.

Peripheral Guides—

SPRU566 — TMS320x28xx, 28xxx DSP Peripheral Reference Guide describes the peripheral

reference guides of the 28x digital signal processors (DSPs).

SPRUG03B– August 2008– Revised June 2011 Preface

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Related Documentation From Texas Instruments

www.ti.com

SPRUFB0 — TMS320x2833x, 2823x System Control and Interrupts Reference Guide describes the

various interrupts and system control features of the 2833x and 2823x digital signal controllers

(DSCs).

SPRU812 — TMS320x2833x, 2823x Analog-to-Digital Converter (ADC) Reference Guide describes

how to configure and use the on-chip ADC module, which is a 12-bit pipelined ADC.

SPRU949 — TMS320x2833x, 2823x DSC External Interface (XINTF) Reference Guide describes the

XINTF, which is a nonmultiplexed asynchronous bus, as it is used on the 2833x and 2823x devices.

SPRU963 — TMS320x2833x, 2823x Boot ROM Reference Guide describes the purpose and features of

the bootloader (factory-programmed boot-loading software) and provides examples of code. It also

describes other contents of the device on-chip boot ROM and identifies where all of the information

is located within that memory.

SPRUFB7 — TMS320x2833x, 2823x Multichannel Buffered Serial Port (McBSP) Reference Guide

describes the McBSP available on the 2833x and 2823x devices. The McBSPs allow direct

interface between a device and other devices in a system.

SPRUFB8 — TMS320x2833x, 2823x Direct Memory Access (DMA) Module Reference Guide

describes the DMA on the 2833x and 2823x devices.

SPRUG04 — TMS320x2833x, 2823x Enhanced Pulse Width Modulator (ePWM) Module Reference

Guide describes the main areas of the enhanced pulse width modulator that include digital motor

control, switch mode power supply control, UPS (uninterruptible power supplies), and other forms of

power conversion.

SPRUG02 — TMS320x2833x, 2823x High-Resolution Pulse Width Modulator (HRPWM) Reference

Guide describes the operation of the high-resolution extension to the pulse width modulator

(HRPWM).

SPRUFG4 — TMS320x2833x, 2823x Enhanced Capture (eCAP) Module Reference Guide describes

the enhanced capture module. It includes the module description and registers.

SPRUG05 — TMS320x2833x, 2823x Enhanced Quadrature Encoder Pulse (eQEP) Module

Reference Guide describes the eQEP module, which is used for interfacing with a linear or rotary

incremental encoder to get position, direction, and speed information from a rotating machine in

high-performance motion and position control systems. It includes the module description and

registers.

SPRUEU1 — TMS320x2833x, 2823x Enhanced Controller Area Network (eCAN) Reference Guide

describes the eCAN that uses established protocol to communicate serially with other controllers in

electrically noisy environments.

SPRUFZ5 — TMS320x2833x, 2823x Serial Communications Interface (SCI) Reference Guide

describes the SCI, which is a two-wire asynchronous serial port, commonly known as a UART. The

SCI modules support digital communications between the CPU and other asynchronous peripherals

that use the standard non-return-to-zero (NRZ) format.

SPRUEU3 — TMS320x2833x, 2823x DSC Serial Peripheral Interface (SPI) Reference Guide

describes the SPI - a high-speed synchronous serial input/output (I/O) port - that allows a serial bit

stream of programmed length (one to sixteen bits) to be shifted into and out of the device at a

programmed bit-transfer rate.

SPRUG03 — TMS320x2833x, 2823x Inter-Integrated Circuit (I2C) Module Reference Guide describes

the features and operation of the inter-integrated circuit (I2C) module.

Tools Guides—

SPRU513 — TMS320C28x Assembly Language Tools v5.0.0 User's Guide describes the assembly

language tools (assembler and other tools used to develop assembly language code), assembler

directives, macros, common object file format, and symbolic debugging directives for the

TMS320C28x device.

Read This First SPRUG03B– August 2008– Revised June 2011

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