The MM912_S812 is an engine control IC, combining an MCU (S12XS) and analog control die (MC33812) intended for motorcycle and other single/dual cylinder small engine control applications. The IC reduces design complexity, bill of materials and manufacturing cost while helping to shorten the customer’s time to market. Other benefits for your small engine designs include: Increased fuel efficiency when converting from a mechanical system to an electrical system Improved emissions using electrical system of this IC compared to a mechanical system Easiest way to interface a MCU to DC loads Simplified system design Reduced board space Reduced number of components Enhanced reliability
8 KB or 12 KB RAM
Flash memory size of 128 KB or 256 KB
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
Error correction code (ECC) on flash memory
Separate data-flash module for code or data storage
Frequency modulated locked loop (IPLL)
Fast ATD converter
Three integrated low side drivers
One pre-driver
+5.0 V, voltage pre-regulator
MCU watchdog circuit
ISO 9141 K-Line interface
Parallel interface for MCU communication
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
Provides single package ECU for minimum PC board area
