SG187 Motorola / Freescale Semiconductor, SG187 Datasheet - Page 25

• Manufacturer Part Number: SG187
• Description: Automotive Selector Guide 2Q, 2001
• Manufacturer: Motorola / Freescale Semiconductor

DSI physical interface
M•CORE Microcontroller
DSI Sensor
DSI firing unit
Inertial sensor
Inertial sensor
BUCKLE-UP DETECTION
SWITCH
SWITCH
LEFT REAR AIR BAG STAGE I
LEFT REAR AIR BAG STAGE II
SWITCH
RIGHT REAR AIR BAG STAGE I
RIGHT REAR AIR BAG STAGE II
SWITCH
Device Application
REAR BELT PRETENSIONER III
68HC05 Family
SWITCH
ALTERNATOR DISCONNECT
ACCELEROMETER
SENSOR BUS
CENTRAL
DUAL AXIS
FIRING BUS IV
ECU
50g
OCCUPANT PRESENCE
RFU
4–8 BIT
RFU
MCU
OCCUPANT PRESENCE
RFU
DETECTOR
4–8 BIT
RFU
MCU
RFU
OCCUPANT PRESENCE
DETECTOR
RFU
4–8 BIT
MCU
2–4 TIMER CHANNELS
OCCUPANT PRESENCE
DETECTOR
10-CH 10-BIT ADC
QSPI, QSCI, SCI,
BDLC, DSIM, CAN
4–8 BIT
MCU
ASIC
OCCUPANT PRESENCE
64K FLASH
MC33790
MMC2103
PC33793
PC33792
50g
250g
MMC2103
DETECTOR
2K RAM
4–8 BIT
OCCUPANT DETECTION
MCU
Suggested
ASIC
Device
DSI Architecture Example
SENSOR
ASIC
ASIC
FIRING BUS III
ASIC
2-channel DSI physical interface for bus masters
With on-chip 8-channel DSI bus master protocol module
Connects analog output sensors to the bus
Connects remote squibs to the bus
Dual axis, XY direction
Single axis, Z direction
FAIL LAMP DRIVER
PHYSICAL LAYER
BOOST SUPPLY
Vreg + RESET
CAN OR J1850
RFU
RFU
RFU
1 IC
DRIVER AIR BAG STAGE I
RFU
ACCELEROMETER
ACCELEROMETER
DRIVER AIR BAG STAGE II
RFU
COM. DRIVER
MCU + Vreg +
PASSENGER AIR BAG STAGE I
SINGLE AXIS
1 PACKAGE
RFU
ACCELEROMETER
ACCELEROMETER
PASSENGER AIR BAG STAGE II
1–2 ICs
COM. DRIVER
MCU + Vreg +
DRIVER KNEE AIR BAG
SINGLE AXIS
PASSENGER KNEE AIR BAG
250g
FIRING BUS II
FIRING BUS I
Device Highlights
SIDE IMPACT SENSORS
RFU
RFU
RFU
RFU
RFU
RFU
DRIVER BELT PRETENSIONER
PASSENGER BELT PRETENSIONER
DSI Architecture
RFU
RFU
DRIVER SIDE AIR BAG STAGE I
PASSENGER SIDE AIR BAG STAGE I
RFU
RFU
DRIVER SIDE AIR BAG STAGE II
PASSENGER SIDE AIR BAG STAGE II
RFU
RFU
REAR SIDE AIR BAG STAGE I
REAR SIDE AIR BAG STAGE III
REAR SIDE AIR BAG STAGE II
REAR SIDE AIR BAG STAGE IV
REAR BELT PRETENSIONER I
REAR BELT PRETENSIONER II
BASE SYSTEM
OPTIONS