ST72325AR7-Auto datasheet(139/243 Pages) STMICROELECTRONICS

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ST72325xxx-Auto

Serial communications interface (SCI)

Doc ID 13770 Rev 3

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Serial communications interface (SCI)

15.1

Introduction

The Serial Communications Interface (SCI) offers a flexible means of full-duplex data

exchange with external equipment requiring an industry standard NRZ asynchronous serial

data format. The SCI offers a very wide range of baud rates using two baud rate generator

systems.

15.2

Main features

●

Full duplex, asynchronous communications

●

NRZ standard format (Mark/Space)

●

Dual baud rate generator systems

●

Independently programmable transmit and receive baud rates up to 500K baud

●

Programmable data word length (8 or 9 bits)

●

Receive buffer full, Transmit buffer empty and End of Transmission flags

●

2 receiver wake-up modes:

–

Address bit (MSB)

–

Idle line

●

Muting function for multiprocessor configurations

●

Separate enable bits for Transmitter and Receiver

●

4 error detection flags:

–

Overrun error

–

Noise error

–Frame error

–

Parity error

●

5 interrupt sources with flags:

–

Transmit data register empty

–

Transmission complete

–

Receive data register full

–

Idle line received

–

Overrun error detected

●

Parity control:

–

Transmits parity bit

–

Checks parity of received data byte

●

Reduced power consumption mode

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