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)