ST7263BEx datasheet(109/186 Pages) STMICROELECTRONICS

109 / 186 page

ST7263Bxx

On-chip peripherals

Doc ID 7516 Rev 8

109/186

11.5

I²C bus interface

11.5.1

Introduction

The I²C bus interface serves as an interface between the microcontroller and the serial I²C

bus. It provides both multimaster and slave functions, and controls all I²C bus-specific

sequencing, protocol, arbitration and timing. It supports fast I²C mode (400 kHz).

11.5.2

Main features

●

Parallel-bus/I²C protocol converter

●

Multimaster capability

●

7-bit addressing

●

Transmitter/receiver flag

●

End-of-byte transmission flag

●

Transfer problem detection

I²C master features

●

Clock generation

●

I²C bus busy flag

●

Arbitration Lost Flag

●

End of byte transmission flag

●

Transmitter/Receiver Flag

●

Start bit detection flag

●

Start and Stop generation

I²C slave features

●

Stop bit detection

●

I²C bus busy flag

●

Detection of misplaced start or stop condition

●

Programmable I²C Address detection

●

Transfer problem detection

●

End-of-byte transmission flag

●

Transmitter/Receiver flag

11.5.3

General description

In addition to receiving and transmitting data, this interface converts it from serial to parallel

format and vice versa, using either an interrupt or polled handshake. The interrupts are

enabled or disabled by software. The interface is connected to the I²C bus by a data pin

(SDAI) and by a clock pin (SCLI). It can be connected both with a standard I²C bus and a

Fast I²C bus. This selection is made by software.

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