3

Device overview

3.1

Main features

•

Dedicated INT_REG_SUP pin, providing supply voltage to the internal low voltage regulators

•

Dedicated VCC pin, providing supply voltage to the digital I/Os and the internal low voltage regulator

supplying the digital circuitry

•

Dedicated VSYS pin, providing supply voltage to DC sensor interfaces and deployment diagnostic circuits

•

Internal 16 MHz oscillator for timing generation

•

Internal 10 MHz oscillator for monitoring

•

Dedicated CLKIN pin to provide an external 4 MHz clock, 1% accurate, to improve timing accuracy (by FLL

circuitry)

•

RESET_N reset input pin

•

Power-supply voltage and die average temperature monitoring by dedicated A/D converter

•

Internal NVM, used for trimming

3.2

SPI interface

•

One dedicated 32-bit SPI bus for global configuration and control

•

One dedicated 32-bit SPI bus for remote sensor configuration and control, SafeSPI v1.0 compatible

3.3

Deployment drivers and diagnostics

•

8 high-side deployment drivers, 8 low side deployment drivers

•

Low-energy actuator (LEA) support available on 2 channels (6 and 7)

•

Common-return (CSRx) connection support available on 2 channel couples (2-3 and 4-5)

•

Independently controlled high-side and low-side FETs

•

User-programmable deployment options

–

Low current: 1.21 A minimum

–

High current: 1.76 A minimum

–

Programmable dwell time in 16 µs increments

–

Automatic dynamic deployment current profile

•

Configurable deployment current monitor feature

•

Deployment interruption in case of high-side short to ground and/or supply overvoltage

•

Squib/LEA resistance measurement

•

High and low-side FET tests

•

Open and shorts diagnostics, including between loop drivers

•

LEA diode presence/integrity diagnostics

3.4

Remote sensor interfaces

•

2 channel receiver, PSI-5 v2.3 compatible with SYNC pulse

•

Dedicated supply input pins for both satellite and SYNC pulse operation

•

Current limit with short circuit protection diagnostics

•

Auto-adjusting current trip points for each channel

•

Satellite data with parity and CRC, 10 bit, 16 bit and 20 bit messages, 125 k or 189 kbps

•

Satellite message error detection

3.5

DC sensor interfaces

•

7 integrated interfaces with current sense capability

•

Compatible with Hall-effect, resistive and switch sensors

•

Current limit protected output

L9689E

Device overview

DB4807 - Rev 2

page 9/19