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Features

? M68HC11 CPU

? 256 Bytes of On-Chip Static RAM

? 1024 Bytes of Bootstrap ROM (Available in Single-Chip, Bootstrap, and Special-Test Modes)

? Power Saving STOP and WAIT Modes

? 64 Kbyte Address Space, Expandable to 256 Kbytes Using On-Chip Memory Mapping Logic

? Multiplexed Address/Data Bus

? 16-Bit Timer System

— Three Input Capture (IC) Channels

— Four Output Compare (OC) Channels

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

? 8-Bit Pulse Accumulator

? Real-Time Interrupt Circuit

? Computer Operating Properly (COP) Watchdog Timer

? Clock Monitor

? Five External General-Purpose Chip Select Signals, Each with Programmable Clock Stretching

? One External Vector/Program Chip Select with Programmable Clock Stretching

? Nine External Interrupt Request Inputs (One Nonmaskable Interrupt)

? Two 8-Bit Pulse-Width Modulation (PWM) Timer Channels (Concatenate for a Single 16-Bit PWM)

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

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

? Synchronous Serial Peripheral Interface (SPI)

? Six Input/Output (I/O) Ports (35 Pins)

— 31 Bidirectional

— 4 Input Only

? All Bidirectional Port Pins Have Selectable Internal Pull-Up Devices

? Available in 68-Pin Plastic Leaded Chip Carrier (PLCC) and 64-Pin Quad Flat Pack (QFP)