MM912H634DV1AER2

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Applications:	Automotive
Core Processor:	S12
Program Memory Type:	FLASH (64 kB)
Controller Series:	HCS12
RAM Size:	6K x 8
Interface:	LIN, SCI
Number of I/O:	9
Voltage - Supply:	2.25 V ~ 5.5 V
Operating Temperature:	-40°C ~ 105°C
Mounting Type:	Surface Mount
Package / Case:	48-LQFP Exposed Pad
Supplier Device Package:	48-LQFP-EP (7x7)
Base Part Number:	MM912H634

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Application Field and Working Principle of MM912H634DV1AER2

Introduction

The MM912H634DV1AER2 is a microcontroller integrated circuit (µC) tailored and optimized for automotive control applications. It was launched by Freescale Semiconductor Inc.’s semiconductor division and offers unprecedented levels of integration, low power consumption and a wide temperature range, allowing designers of the latest automotive control systems to satisfy the increasing demands of their applications.

Features of MM912H634DV1AER2

The MM912H634DV1AER2 is designed to meet stringent automotive safety requirements, with an optional redundant/fail-safe architecture comprising of two identical processors. This allows designers to double up on their software checking and improve system robustness during normal operation or under environmental stresses. The core of the IC integrates a high-performance 16-bit S08-family CPU, operating at a maximum frequency of 25MHz, with an on-chip memory management unit (MMU) and 32Kbytes of on-chip flash-ROM along with up to 16Kbytes of on-chip RAM.The MM912H634DV1AER2 also integrates additional peripherals, including three module buses (MBs), a 12-bit analog-to-digital (A/D) converter, up to 63 configurable general-purpose input/output (GPIO) pins, an 8-channel pulse-width modulation (PWM) controller, an 8-channel timer interface and a serial peripheral interface (SPI).

Application Uses of MM912H634DV1AER2

The MM912H634DV1AER2 has been designed to provide a cost-effective microcontroller solution for a variety of applications, including engine control, chassis control, passenger comfort, lighting, navigation and infotainment. Each of these applications has differing requirements with respect to performance, safety, cost and power consumption.The architecture of the MM912H634DV1AER2 makes it an ideal choice for a variety of engine control applications, such as fuel injection, ignition and exhaust control. The integrated peripherals including the A/D and PWM controllers help to reduce the number of external components, resulting in a simpler, more reliable and cost-effective design.The MM912H634DV1AER2 also provides an efficient solution for chassis control applications, such as suspension, brake, transmission and powertrain control. The integrated timer interface is capable of implementing a real-time clock, enabling time-based functions, while the 3-module buses can be used to interface with sensors and actuators.The MM912H634DV1AER2 provides an ideal solution for passenger comfort applications, such as air conditioning, climate control and power accessories control. The integrated SPI and GPIO make this IC ideal for connectivity to touch screens and other displays.The integrated GPIO can also be used for lighting control applications, such as ambient lighting. The timer interface and the PWM controllers can be used to provide efficient dimming control.The MM912H634DV1AER2 can also be used in navigation and infotainment applications, as it provides the necessary processing power and memory resources to decode and display digital audio and video streams. The integrated peripherals provide the necessary connectivity options to allow the IC to interface with digital displays and audio codecs.

Working Principle of MM912H634DV1AER2

The MM912H634DV1AER2 operates in a similar manner to any other microcontroller. The core of the IC contains an embedded processor which executes code stored in the integrated flash-ROM. The code can be written in a number of languages and instruction sets, including C, C++ and 16-bit machine instructions.The processor core is supplemented by a range of dedicated peripherals, such as an A/D converter for analog-to-digital conversion and various GPIO for digital input/output. The PWM controller provides pulse-width-modulation output, while the timer interface handles real-time operation, such as time-based functions. The module buses provide connectivity to external peripherals, such as sensors and actuators.The MM912H634DV1AER2 can also be used to implement complex motor control algorithms, such as position and torque control, as it integrates all the necessary peripherals and features to reduce the complexity of external circuitry. The IC’s optional redundant/fail-safe architecture offers an additional layer of safety and security. This architecture takes advantage of the two identical processors to double up on code checks in order to minimize the chances of incorrect code execution and, in the event of a fault, switch between the two processors to keep the system running.

Conclusion

The MM912H634DV1AER2 is an ideal solution for a wide range of automotive control applications, thanks to its high level of integration, low power consumption and wide temperature range. The integrated peripherals and optional redundant/fail-safe architecture provide designers of control systems with the necessary tools to reduce the cost, complexity and time-to-market of their projects. The MM912H634DV1AER2’s working principle is similar to that of any other microcontroller, making it an excellent choice for cost-sensitive control applications.

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