ST72361AR4-Auto datasheet(273/279 Pages) STMICROELECTRONICS

273 / 279 page

ST72361xx-Auto

Important notes

Doc ID 12468 Rev 3

273/279

Figure 131. Header reception event sequence

Figure 132. LINSCI interrupt routine

23.2

Flash/FastROM devices only

23.2.1

LINSCI wrong break duration

SCI mode

A single break character is sent by setting and resetting the SBK bit in the SCICR2 register.

In some cases, the break character may have a longer duration than expected:

●

20 bits instead of 10 bits if M = 0

●

22 bits instead of 11 bits if M = 1

In the same way, as long as the SBK bit is set, break characters are sent to the TDO pin.

This may lead to generate one break more than expected.

LIN Synch

Identifier

Field

Break

THEADER

Active mode is set

RDRF flag is set

Critical

Window

ID field STOP bit

(RWU is cleared)

@interrupt void LINSCI_IT ( void ) /* LINSCI interrupt routine */

{

/* clear flags */

SCISR_buffer = SCISR;

SCIDR_buffer = SCIDR;

if ( SCISR_buffer & LHE )/* header error ? */

{

if (!LHLR)/* header time-out? */

{

if ( !(SCICR2 & RWU) )/* active mode ? */

{

_asm("sim");/* disable interrupts */

SCISR;

SCIDR;/* Clear RDRF flag */

SCICR2 |= RWU;/* set mute mode */

SCISR;

SCIDR;/* Clear RDRF flag */

SCICR2 |= RWU;/* set mute mode */

_asm("rim");/* enable interrupts */

}

Example using Cosmic compiler syntax

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