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Introduction

The MC68HC908AB32 is a member of the low-cost, high-performance M68HC08 Family of 8-bit microcontroller units (MCUs) with embedded EEPROM for user data storage. 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 MC68HC908AB32 include the following:

? High-performance M68HC08 architecture

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

M68HC05 Families

? Memory map and pin functions compatible with MC68HC08AB32

and MC68HC08AB16

? 8-MHz internal bus frequency

? 32K-bytes user program FLASH memory with security1 feature

? 512 bytes of on-chip EEPROM with security feature

? 1K-byte of on-chip RAM

? Clock generator module (CGM)

? Two 16-bit, 4-channel timer interface modules (TIMA and TIMB)

with selectable input capture, output compare, and PWM

capability on each channel

? Programmable interrupt timer (PIT)

? Serial peripheral interface module (SPI)

? Serial communications interface module (SCI)

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

? Low-power design (fully static with STOP and WAIT modes)

? Master reset pin and power-on reset

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

– 30 shared-function I/O pins

– 5-bit keyboard wakeup port

– Selectable pullups on inputs on port D and port F

? System protection features

– Optional computer operating properly (COP) reset

– Low-voltage detection with optional reset

– Illegal opcode detection with optional reset

– Illegal address detection with optional reset

? 64-pin quad flat pack (QFP) (Continue ...)