Document Number: MM912_P812

Rev. 1.0, 05/2012

Freescale Semiconductor

Advance Information

© Freescale Semiconductor, Inc., 2012. All rights reserved.

*This document contains certain information on a product under development.

Freescale reserves the right to change or discontinue this product without notice

S12P MCU and Multifunctional

Ignition and Injector Driver

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.

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

Figure 1. MM912_P812 Simplified Application Diagram

912_P812

98ASA00371D

100 Pin LQFP-EP

Notes

1.

Surge Voltage protection

recommended on VPWR

2.

Not all connections on MCU shown

912_P812

VCCREF

VDD

VCCSENS

RESET

RESET

WDRFSH

LAMPOUT

DGND

PGND

PAD9

PM0/RXCAN

INJOUT

WD_INH

IGNOUTL

ISO9141

I/O

INJIN

I/O

INJFLT

I/O

IGNIN

I/O

IGNFLT

I/O

EXTAL

VPWR

LAMPIN

I/O

RIN

I/O

5.0 V

RELFLT

I/O

MRX

RXD

MTX

TXD

XTAL

VSS

TM_EN, TEST2

MOSI

SCK

SS

MISO

IRQ

PM1/TXCAN

PAD3

PAD4

PAD5

PAD6

PAD7

PAD0

PAD1

PAD2

ISO9141

IGNOUTH

IGNSUP

IGNFB

ROUT

Injector

Relay or

other load

TEST1