Description

A 32-bit microcontroller with high levels of integration called the MC68332ACEH25 combines high-performance data manipulation with robust peripheral subsystems. The MCU is composed of common modules that connect via an intermodule bus (IMB). The quick creation of devices designed for certain uses is made possible by standardization.

The MCU includes a queued serial module (QSM), a 2-Kbyte static RAM module with TPU emulation capability, a 32-bit CPU (CPU32), a system integration module (SIM), a time processor unit (TPU), and a 32-bit CPU (CPU) (TPURAM).

The MCU can directly use an external clock input or synthesize an internal clock signal from an external reference. The standard operation uses a 32.768-kHz reference frequency. The system clock has a maximum frequency of 20.97 MHz. Changes in clock rate are possible during operation thanks to system hardware and software. Changes in clock rate have no impact on the register and memory contents of MCUs because their operation is entirely static.

The HCMOS architecture, which uses high-density complementary metal-oxide semiconductors, reduces the MCU's basic power consumption. The system clock can be turned off to reduce power usage. This functionality is effectively implemented by the low-power stop (LPSTOP) command found in the CPU32 instruction set.

Features

• Time Processor Unit (TPU)

  — Dedicated Microengine Operating Independently of CPU32

  — 16 Independent, Programmable Channels and Pins

  — Any Channel can Perform any Time Function

  — Two Timer Count Registers with Programmable Prescalers

  — Selectable Channel Priority Levels

• Queued Serial Module (QSM)

  — Enhanced Serial Communication Interface

  — Queued Serial Peripheral Interface

  — One 8-Bit Dual Function Port

• Static RAM Module with TPU Emulation Capability (TPURAM)

  — 2-Kbytes of Static RAM

  — May be Used as Normal RAM or TPU Microcode Emulation RAM

• Central Processing Unit (CPU32)

  — 32-Bit Architecture

  — Virtual Memory Implementation

  — Table Lookup and Interpolate Instruction

  — Improved Exception Handling for Controller Applications

  — High-Level Language Support

  — Background Debugging Mode

  — Fully Static Operation

• System Integration Module (SIM)

  — External Bus Support

  — Programmable Chip-Select Outputs

  — System Protection Logic

  — Watchdog Timer, Clock Monitor, and Bus Monitor

  — Two 8-Bit Dual Function Input/Output Ports

  — One 7-Bit Dual Function Output Port

  — Phase-Locked Loop (PLL) Clock System

Applications

• Automobile engine control systems

• Implantable medical devices

• Remote controls, office machines

• Appliances

• Power tools

• Toys and other embedded systems