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General Description

Introduction

The MC68HC908QY4A is a member 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

Features include:

? High-performance M68HC08 CPU core

? Fully upward-compatible object code with M68HC05 Family

? 5-V and 3-V operating voltages (VDD)

? 8-MHz internal bus operation at 5 V, 4-MHz at 3 V

? Trimmable internal oscillator

¨C Software selectable 1 MHz, 2 MHz, or 3.2 MHz internal bus operation

¨C 8-bit trim capability

¨C ¡À25 untrimmed

¨C Trimmable to approximately 0.4(1)

? Software selectable crystal oscillator range, 32¨C100 kHz, 1¨C8 MHz and 8¨C32 MHz

? Software configurable input clock from either internal or external source

? Auto wakeup from STOP capability using dedicated internal 32-kHz RC or bus clock source

? On-chip in-application programmable FLASH memory

¨C Internal program/erase voltage generation

¨C Monitor ROM containing user callable program/erase routines

¨C FLASH security(2)

? On-chip random-access memory (RAM)

? 2-channel, 16-bit timer interface (TIM) module

? 6-channel, 10-bit analog-to-digital converter (ADC) with internal bandgap reference channel (ADC10)

? Up to 13 bidirectional input/output (I/O) lines and one input only:

¨C Six shared with KBI

¨C Six shared with ADC

¨C Two shared with TIM

¨C One input only shared with IRQ

¨C High current sink/source capability on all port pins

¨C Selectable pullups on all ports, selectable on an individual bit basis

¨C Three-state ability on all port pins

? 6-bit keyboard interrupt with wakeup feature (KBI)

¨C Programmable for rising/falling or high/low level detect

? Low-voltage inhibit (LVI) module features:

¨C Software selectable trip point

? System protection features:

¨C Computer operating properly (COP) watchdog

¨C Low-voltage detection with reset

¨C Illegal opcode detection with reset

¨C Illegal address detection with reset

? External asynchronous interrupt pin with internal pullup (IRQ) shared with general-purpose input pin

? Master asynchronous reset pin with internal pullup (RST) shared with general-purpose input/output (I/O) pin

? Memory mapped I/O registers

? Power saving stop and wait modes

? MC68HC908QY4A, MC68HC908QY2A and MC68HC908QY1A are available in these packages:

¨C 16-pin plastic dual in-line package (PDIP)

¨C 16-pin small outline integrated circuit (SOIC) package

¨C 16-pin thin shrink small outline packages (TSSOP)

? MC68HC908QT4A, MC68HC908QT2A and MC68HC908QT1A are available in these packages:

¨C 8-pin PDIP

¨C 8-pin SOIC

¨C 8-pin dual flat no lead (DFN) package