AT89C5131-RDTIL datasheet(98/176 Pages) ATMEL

Nome de Peças	AT89C5131-RDTIL

Descrição Electrónicos	8-bit Flash Microcontroller with Full Speed USB Device

PDF	176 Pages

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Fabricante Electrônico	ATMEL [ATMEL Corporation]

Página de início	http://www.atmel.com

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AT89C5131

4136B–USB–09/03

Two Wire Interface (TWI)

Introduction

The Synchronous Serial Link Controller (SSLC) provides the selection of one synchro-

nous serial interface among the two most popular ones:

•

Two Wire Interface (TWI).

•

Serial Peripheral Interface (SPI)

When an interface is selected, the other is no longer available, its usage is exclusive.

This section describes the TWI. In the rest of the section SSLC means TWI. The TWI

bus is a bi-directional two-wire serial communication standard. It is designed primarily

for simple but efficient integrated circuit (IC) control. The system is comprised of two

lines, SCL (Serial Clock) and SDA (Serial Data) that carry information between the ICs

connected to them. The serial data transfer is limited to 400 Kbit/s in standard mode.

Various communication configurations can be designed using this bus. Figure 46 shows

a typical TWI bus configuration. All the devices connected to the bus can be master and

slave.

Figure 46. TWI Bus Configuration

SCL

SDA

device2

device1

deviceN

device3

...

AT89C5131-RDTIL Folha de dados(PDF) 98 Page - ATMEL Corporation