ST7LITE39 datasheet(88/167 Pages) STMICROELECTRONICS

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11.5 LINSCI SERIAL COMMUNICATION INTERFACE (LIN MASTER/SLAVE)

11.5.1 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 of-

fers a very wide range of baud rates using two

baud rate generator systems.

The LIN-dedicated features support the LIN (Local

Interconnect Network) protocol for both master

and slave nodes.

This chapter is divided into SCI Mode and LIN

mode sections. For information on general SCI

communications, refer to the SCI mode section.

For LIN applications, refer to both the SCI mode

and LIN mode sections.

11.5.2 SCI Features

■ Full duplex, asynchronous communications

■ NRZ standard format (Mark/Space)

■ 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

■ Two receiver wake-up modes:

– Address bit (MSB)

– Idle line

■ Muting function for multiprocessor configurations

■ Separate

enable bits for Transmitter and

Receiver

■ Overrun, Noise and Frame error detection

■ Six interrupt sources

– Transmit data register empty

– Transmission complete

– Receive data register full

– Idle line received

– Overrun error

– Parity interrupt

■ Parity control:

– Transmits parity bit

– Checks parity of received data byte

■ Reduced power consumption mode

11.5.3 LIN Features

– LIN Master

– 13-bit LIN Synch Break generation

– LIN Slave

– Automatic Header Handling

– Automatic

baud

rate

re-synchronization

based on recognition and measurement of the

LIN Synch Field (for LIN slave nodes)

– Automatic baud rate adjustment (at CPU fre-

quency precision)

– 11-bit LIN Synch Break detection capability

– LIN Parity check on the LIN Identifier Field

(only in reception)

– LIN Error management

– LIN Header Timeout

– Hot plugging support

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