L9679P datasheet(123/272 Pages) STMICROELECTRONICS

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DocID029275 Rev 1

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L9679P

SPI interfaces

271

7.3.41

Safing algorithm configuration register (SAF_ALGO_CONF)

ID:

Type:

R/W

Read:

6600

Write:

00CC

MOSI

MISO

000

NO_DATA

0 Event counter no data select

Updated by SSM_RESET or SPI write while in DIAG state

0 Event counter reset to 0 if CC=0 or (ABS value of response > limit

determined by LIM_SELx) and LIM_ENx=1 when SPI read of SAF_CC bit

is performed (end of sample cycle)

1 Event counter decremented by SUB_VAL if CC=0 or (ABS value of

response > limit determined by LIM_SELx) and LIM_ENx=1 when

SPI read of SAF_CC bit is performed (end of sample cycle)

ARMN_TH 0011 0011 0011 Negative event counter threshold to assert arming

Updated by SSM_RESET or SPI write while in DIAG state

0000 Negative event counter disabled

ARMP_TH 0011 0011 0011 Positive event counter threshold to assert arming

Updated by SSM_RESET or SPI write while in DIAG state

0000 Positive event counter disabled

SUB_VAL

011 011 011 Decremental step size of the event counter

Updated by SSM_RESET or SPI write while in DIAG state

ADD_VAL

001 001 001 Incremental step size of the event counter

Updated by SSM_RESET or SPI write while in DIAG state

L9679P Datasheet(PDF) 123 Page - STMicroelectronics