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Applications
• Window Lift
• Seat Control
• Sun Roof Control
• Fan Control
• Key Pad Interface
• Switch Panel Interface
Overview
The MM912_634 is a family of network-
enabled controllers for automotive
applications that integrate an HCS12
microcontroller and a SMARTMOS analog
control IC into a single package. The analog
die combines System Basis Chip (SBC)
functionality and application specific
functions, which include a Local
Interconnect Network (LIN) transceiver,
relay drivers, a DC motor current sense
circuit, and a selection of high and low side
digital I/O.
Control of the analog die is via a new high
performance internal Die to Die interface
(D2D), which seamlessly integrates the
analog IC registers into the MCU register
map, to provide faster access than SPI
based systems.
MM912_634 Simplified Application Drawing
MM912_634
VSENSE
VS1
VS2
LIN
VDD
AGND
R
ESET
RESET_A
PA0/MISO
LS1
LS2
ISENSEH*
HS1
HS2*
TEST_A
LGND
Battery Sense
L1
M
TCLK
L2
L3
L4*
ISENSEL*
PGND
L0
L5*
Hall Sensor
HSUP
Hall Sensor
PTB0/AD0/RX/TIM0CH0
PTB1/AD1/TX/TIM0CH1
PTB2/AD2/PWM/TIM0CH2
PA1/MOSI
PA2/SCK
PA3/SS
PA4
PA5
PA6*
PA7*
BKGD/MODC
PE0/EXTAL
PE1/XTAL
TEST
ADC25
VDDD2D
VDDX
VDDRX
DGND
VSSRX
VSSD2D
Power Supply
LIN Interface
ADC Supply
2.5 V Suppy
5.0 V Supply
Digital Ground
Reset
5.0 V Digital I/O
Debug and External
Oscillator
MCU Test
* Feature not available in all part numbers - see Data Sheets
Low Side Drivers
Current Sense Module
Hall Sensor Supply
5.0 V GPI/O with optional
pull-up (shared with ADC,
PWM, Timer, and SCI)
12 V Light/LED and
Switch Supply
Analog/Digita inputs
(High Voltage and Wake-up
capable)
Analog Test
Analog, Mixed Signal and Power Management
MM912_634
Integrated S12 Based Relay Drivers with LIN
