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General Description

Introduction

The MC68HC908AP64 is a member of the low-cost, high-performance M68HC08 Family of 8-bit microcontroller units(MCUs). The M68HC08 Family is based on the customer-specified integrated circuit (CSIC) design strategy. 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

Features of the MC68HC908AP64 include the following:

? High-performance M68HC08 architecture

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

? Maximum internal bus frequency:

– 8-MHz at 5V or 3V operating voltage

? Clock input options:

– RC-oscillator

– 32-kHz crystal-oscillator with32MHz internal phase-lock-loop

? User program FLASH memory with security

– 62,368 bytes for MC68HC908AP64

– 32,768 bytes for MC68HC908AP32

– 16,384 bytes for MC68HC908AP16

– 8,192 bytes for MC68HC908AP8

? On-chip RAM

– 2,048 bytes for MC68HC908AP64 and MC68HC908AP32

– 1,024 bytes for MC68HC908AP16 and MC68HC908AP8

? Two 16-bit, 2-channel timer interface modules (TIM1 and TIM2) with selectable input capture, output compare, and PWM capability on each channel

? Timebase module

? Serial communications interface module 1 (SCI)

? Serial communications interface module 2 (SCI) with infrared (IR) encoder/decoder

? Serial peripheral interface module (SPI)

? System management bus (SMBus), version 1.0/1.1 (multi-master IIC bus)

? 8-channel, 10-bit analog-to-digital converter (ADC)

? IRQ1external interrupt pin with integrated pullup

? IRQ2external interrupt pin with programmable pullup

? 8-bit keyboard wakeup port with integrated pullup

? 32 general-purpose input/output (I/O) pins:

– 31 shared-function I/O pins

– 8 LED drivers (sink)

– 6×25mA open-drain I/O with pullup

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

? Master reset pin (with integrated pullup) and power-on reset

? System protection features

– Optional computer operating properly (COP) reset, driven by internal RC oscillator

– Low-voltage detection with optional reset or interrupt

– Illegal opcode detection with reset

– Illegal address detection with reset

? 48-pin low quad flat pack (LQFP), 44-pin quad flatpack (QFP), and 42-pin shrink dual-in-line package (SDIP)

? Specific features of the MC68HC908AP64 in 42-pin SDIP are:

– 30 general-purpose l/Os only

– External interrupt on IRQ1only

Features of the CPU08 include the following:

? 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