L9679P datasheet(25/272 Pages) STMICROELECTRONICS

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L9679P

Overview and block diagram

271

5.3

Remote sensor interfaces



Two channel receiver

–

standard PSI-5 v1.3 compatible with sync pulse



Current limit with short circuit protection diagnostics



PSI-5 satellite sensor mode

–

Auto-adjusting current trip points for each satellite channel

–

Even parity, 8 or 10 bit messages, 125k or 189kbps

–

Satellite message error detection

5.4

DC sensor interfaces



Nine integrated switch interfaces with current sense capability



Compatible with Hall-effect, resistive and switch sensors



Current limit protected



System dedicated path to disable the passenger airbag with input from DC sensor

interface

5.5

General purpose outputs



Three configurable high-side or low-side drivers



ON-OFF mode and PWM 0-100% fine control



Diagnostics for short circuit protection and open load detection



Current limit and reverse battery protected

5.6

Arming logic



User configurable safing algorithms with 12 safing records



Four digital sensor interfaces through SPI



Independent user programmable thresholds



Independent user programmable latch timers



Two discrete and independent arming logic outputs



Two discrete and independent internal arming signals



End-of-life interface

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