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)