L9678P datasheet(67/203 Pages) STMICROELECTRONICS

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DocID029274 Rev 3

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L9678P, L9678P-S

SPI interface

202

5.1.13

Device version register (VERSION_ID)

Address:

Type:

Buffer:

$2700

Reset:

5.1.14

Watchdog retry configuration register (WD_RETRY_CONF)

Address:

Type:

Buffer:

$2800

Reset:

$0050

Cleared upon SSM_RESET or SPI read. Set when GND loss is detected

during deployment or loop diag's (HS sw test, LS sw test, squib resistance)

0 Loss of ground not detected

1 Loss of ground detected

MOSI

MISO

DEVICE ID

VERSN

DEVICE ID

Identification of the device

Static value - never updated

001 Low end

010 Medium end

011 High end

VERSN

Identification of the silicon version

000011

CB version

other codes previous versions

MOSI

WD1_RETRY_TH

MISO

WD1_RETRY_TH

WD1 retry counter threshold (number of WD errors permitted before latching

WD1_LOCKOUT=1)

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