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General Description

Introduction

The MC68HC08GR32A and MC68HC08GR16A are members of the low-cost, high-performance M68HC08 Family of 8-bit microcontroller units (MCUs). All MCUs in the family use the enhanced M68HC08 central processor unit (CPU08) and are available with a variety of modules, memory sizes and types, and package types.

Features

For convenience, features have been organized to reflect:

? Standard features of the MC68HC08GR32A and MC68HC08GR16A

? Features of the CPU08

Standard Features of the MC68HC08GR32A and MC68HC08GR16A

Features include:

? High-performance M68HC08 architecture optimized for C-compilers

? Fully upward-compatible object code with M6805, M146805, and M68HC05 Families

? 8-MHz internal bus frequency

? Clock generation module supporting 1-MHz to 8-MHz crystals

? System protection features:

– Optional computer operating properly (COP) reset

– Low-voltage detection with optional reset and selectable trip points for 3.3-V and 5.0-V operation

– Illegal opcode detection with reset

– Illegal address detection with reset

? Low-power design; fully static with stop and wait modes

? Standard low-power modes of operation:

– Wait mode

– Stop mode

? Master reset pin and power-on reset (POR)

? On-chip read-only memory (ROM)

– MC68HC08GR32A — 32,256 bytes

– MC68HC08GR16A — 15,872 bytes

? 1536 bytes of on-chip random-access memory (RAM)

? 32,256 bytes of read-only memory (ROM)

? Serial peripheral interface (SPI) module

? Enhanced serial communications interface (ESCI) module

? One 16-bit, 2-channel timer interface module (TIM1) with selectable input capture, output compare, and pulse-width modulation (PWM) capability on each channel

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Features of the CPU08

Features of the CPU08 include:

? Enhanced HC05 programming model

? Extensive loop control functions

? 16 addressing modes (eight more than the HC05)

? 16-bit index register and stack pointer

? Memory-to-memory data transfers

? Fast 8 × 8 multiply instruction

? Fast 16/8 divide instruction

? Binary-coded decimal (BCD) instructions

? Optimization for controller applications

? Efficient C language support