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912_P812 Datasheet

S12P MCU and Multifunctional Ignition and Injector Driver System

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Freescale Semiconductor
Advance Information
Document Number: MM912_P812
Rev. 1.0, 05/2012
S12P MCU and Multifunctional
Ignition and Injector Driver
912_P812
System In Package (SiP)
The MM912xP812 is an engine control IC combining an MCU
(S12P) and analog control die (MC33812) intended for motorcycle
and other single/dual cylinders small engine control applications.
The MCU S12P has 6 KB RAM, and flash memory size of 96 KB
or 128 KB. The S12P family uses many of the same features found
on the S12XS family, including error correction code (ECC) on flash
memory, a separate data-flash module for diagnostic or data
storage, a fast analog-to-digital converter (ATD), and a frequency
modulated phase locked loop (IPLL) that improves the
electromagnetic compatibility (EMC) performance.
The analog control IC consists of three integrated low side drivers,
one pre-driver, a +5.0 V, voltage pre-regulator, an MCU watchdog
circuit, an ISO 9141 K-Line interface, and a parallel interface for
MCU communication. The three low side drivers are provided for
driving a fuel injector, a lamp or LED, and a relay or another injector
or fuel pump. The pre-driver is intended to drive either an insulated
gate bipolar transistor (IGBT) or a bipolar Darlington transistor to
control an ignition coil.
SMALL ENGINE CONTROL SIP
98ASA00371D
100 Pin LQFP-EP
Features:
• Designed to operate over the range of ~4.7 V VPWR 36 V
• Relay/injector/fuel pump driver—current limit—4.0 A typical
• Lamp driver—current limit—1.5 A typical
• All external outputs protected against short to battery and over-current
• VCC voltage pre-regulator provides +5.0 V power for the MCU
• MCU watchdog timer circuit with parallel refresh/time setting line
• ISO-9141 K-Line transceiver for communicating diagnostic messages
• All signal lines are accessible
• Also available with MC9S12XEP100 MCU for calibration
• For detailed specifications see data sheets for the MC33812 and MC9S12Pxxx
• Provides single package ECU for minimum PC board area
5.0 V
VBAT
912_P812
VDD
VCCSENS
VCCREF
VPWR
LAMPIN
I/O
RIN
I/O
RESET
RESET
WDRFSH
I/O
INJIN
I/O
INJFLT
I/O
IGNIN
I/O
IGNFLT
I/O
RELFLT
I/O
MRX
RXD
MTX
TXD
EXTAL
XTAL
LAMPOUT
ROUT
INJOUT
IGNFB
IGNSUP
IGNOUTH
IGNOUTL
ISO9141
PAD0
PAD1
PAD2
PAD3
PAD4
PAD5
PAD6
PAD7
PAD9
MOSI
SCK
SS
MISO
IRQ
PM1/TXCAN
PM0/RXCAN
TEST1
TM_EN, TEST2
WD_INH
PGND
VSS
DGND
VBAT VBAT
Relay or
other load
Injector
VBAT VBAT
VPWR
ISO9141
Notes
1. Surge Voltage protection
recommended on VPWR
2. Not all connections on MCU shown
Figure 1. MM912_P812 Simplified Application Diagram
*This document contains certain information on a product under development.
Freescale reserves the right to change or discontinue this product without notice
© Freescale Semiconductor, Inc., 2012. All rights reserved.
Freescale Semiconductor
Freescale Semiconductor



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