Datasheet > AN1045

AN1045

更新时间： 2024-10-29 03:18:47

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		/
页数	文件大小	规格书
16页	173K
描述
ST7 S/W IMPLEMENTATION OF I2C BUS MASTER

阅读下载

中文翻译

获取价格

如果您发现信息不准确，欢迎纠错

AN1045 数据手册

AN1045

APPLICATION NOTE

ST7 S/W IMPLEMENTATION OF I2C BUS MASTER

by Microcontroller Division Applications Team

INTRODUCTION

The goal of this application note is to implement an I2C communications software interface for

devices which have no I2C peripheral. The software of this application performs I2C master

transmitter and master receiver functions. The master chosen here is a ST72324 and the

slave is an EEPROM (M24C08).

The program described in this application note is in C language, a program in assembly lan-

guage is also available in the software library (see ST7 CD ROM on Internet).

1 CHARACTERISTICS

The main characteristics of this I2C software are:

■

bit addressing

Master Transmitter/Receiver

Several data bytes sent and received (3 in this application)

Fscl = 62.5 kHz

Acknowledge management

Error management (AF)

The I2C synchronous communication needs only two signals: SCL (Serial clock line) and SDA

(Serial data line). The corresponding port pins used are PA7 for SCL and PA6 for SDA.

These two pins are configured as floating input (to have a high level applied on the pin or to re-

ceive data) or as output open drain (to have a low level applied on the pin or to output data).

Please refer to the ST7 datasheet for more details about port configuration.

AN1045/0803

1/16

12 3 4 5 6 7...16

中文翻译

下载PDF

型号	品牌	获取价格	描述	数据表
AN-1045	CYMBET	获取价格	EnerChip CC Backup Power for Micro Crystal RV-2123 RTC
AN-1046	CYMBET	获取价格	EnerChip CC as Backup Power for a Microchip MCP79410 RTC
AN-1047	CYMBET	获取价格	EnerChip CC Real-Time Clock Backup for K60 Microcontroller
AN-1048	CYMBET	获取价格	EnerChip CC as Backup Power for a DS1340 Real-Time Clock
AN105	VISHAY	获取价格	FETS AS VOLTAGE-CONTROLLED RESISTORS
AN-1050	CYMBET	获取价格	Using the EnerChip Energy Harvesters with the TI LaunchPad
AN-1052	CYMBET	获取价格	Operating the EnerChip in High Temperature Environments
AN-1053	CYMBET	获取价格	Silicon Labs RF-to-USB2 Cymbet EH Demos
AN106	ETC	获取价格	Optoelectronic
AN1062	MOTOROLA	获取价格	Using the QSPI for Analog Data Acquisition