Features

? M68HC11 CPU

? Power Saving STOP and WAIT Modes

? 768 Bytes RAM (All Saved During Standby)

? 24 Kbytes ROM or EPROM

? 640 Bytes Electrically Erasable Programmable Read Only Memory (EEPROM)

? Optional Security Feature Protects Memory Contents

? On-Chip Memory Mapping Logic Allows Expansion to Over 1 Mbyte of Address Space

? PROG Mode Allows Use of Standard EPROM Programmer (27C256 Footprint)

? Nonmultiplexed Address and Data Buses

? Four Programmable Chip Selects with Clock Stretching (Expanded Modes)

? Enhanced 16-Bit Timer with Four-Stage Programmable Prescaler

— Three Input Capture (IC) Channels

— Four Output Compare (OC) Channels

— One Additional Channel, Selectable as Fourth IC or Fifth OC

? 8-Bit Pulse Accumulator

? Four 8-Bit or Two 16-Bit Pulse Width Modulation (PWM) Timer Channels

? Real-Time Interrupt Circuit

? Computer Operating Properly (COP) Watchdog

? Clock Monitor

? Enhanced Asynchronous Nonreturn to Zero (NRZ) Serial Communications Interface (SCI)

? Enhanced Synchronous Serial Peripheral Interface (SPI)

? Eight-Channel 8-Bit Analog-to-Digital (A/D) Converter

? Seven Bidirectional Input/Output (I/O) Ports (54 Pins)

? One Fixed Input-Only Port (8 Pins)

? Available in 84-Pin Plastic Leaded Chip Carrier (PLCC), 84-Pin Windowed Ceramic Leaded Chip

Carrier (CLCC), and 80-Pin Quad Flat Pack (QFP)