3.9

Arming/Passenger inhibit logic

•

User-configurable safing algorithms with 22 safing records

•

5 independent chip-select inputs for external sensor interface SPI snooping

•

Independent chip-select input for master/slave device arming status SPI snooping (in master/slave

configuration)

•

Independent user-programmable thresholds

•

Independent user-programmable latch timers

•

8 discrete and independent internal arming signals

•

8 discrete and independent arming result outputs

•

Passenger loop inhibition via internal monitoring of DC sensors and LIN OCS communication

•

Capability to snoop master/slave device passenger inhibit status on global SPI (in master/slave

configuration)

•

Capability to snoop alternative microcontroller passenger inhibit status on global SPI

•

Capability to receive arming request from global SPI communication using E2E protocol

•

End-of-Life interface

3.10

LIN interface and decoder

•

LIN specification v2.2A compliance and K-LINE ISO9141 compatibility

•

Configurable integrated communication decoder for OCS message monitoring and passenger airbag loop

inhibition

3.11

A/D converters

•

One A/D converter dedicated to power-supply voltage and die average temperature monitoring, providing a

10 bit conversion via Global SPI and with the capability to handle a queue of 4 conversion requests

•

2 A/D converters used to perform ER capacitor value (14 bit conversion, Global SPI) and ESR (13 bit

conversion, Global SPI) measurement diagnostic

•

One A/D converter dedicated to deployment and safing FET regulator circuitry voltage monitoring, providing

a 10 bit conversion via Global SPI and with the capability to handle one conversion request per time

•

One A/D converter dedicated to deployment leakage current diagnostic, providing a 10 bit conversion of the

measured leakage current via Global SPI; this current A/D converter is shared among all 12 deployment

channels

•

6 A/D converters dedicated to remote sensor interfaces, providing a 10 bit conversion of the sensor current

value and used for sensor communication decoding; each RSU channel have a dedicated current A/D

converter

•

2 A/D converters dedicated to DC sensor interfaces, one providing the voltage value (10 bit conversion)

and the other one providing the current value (10 bit conversion); the 2 A/D converters are shared among

all 9 DC sensor channels. Conversions are provided via Global SPI, with the capability to handle a queue

of 4 conversion requests; channel 0 and 1 voltage/current conversions can also be used internally by the

passenger airbag inhibit feature

L9690

Arming/Passenger inhibit logic

DB4806 - Rev 2

page 15/24