L9678P datasheet(95/203 Pages) STMICROELECTRONICS

No. de pieza	L9678P

Descripción Electrónicos	Automotive user configurable airbag IC

PDF	203 Pages

Scroll/Zoom	100%

Fabricante Electrónico	STMICROELECTRONICS [STMicroelectronics]

Página de inicio	http://www.st.com

Logo

95 / 203 page

DocID029274 Rev 3

95/203

L9678P, L9678P-S

SPI interface

202

5.1.35

Safing algorithm configuration register (SAF_ALGO_CONF)

Address:

Type:

R/W

Buffer:

$6600

Reset:

$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 when SPI read of SAF_CC bit is



performed (end of sample cycle)

1 Event counter decremented by SUB_VAL if CC=0 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

L9678P Datasheet(PDF) 95 Page - STMicroelectronics