Introduction

The MC68HC11A8, MC68HC11A1, and MC68HC11A0 high-performance microcontroller units (MCUs) are based on the M68HC11 Family. These high speed, low power consumption chips have multiplexed buses and a fully static design. The chips can operate at frequencies from 3 MHz to dc. The three MCUs are created from the same masks; the only differences are the value stored in the CONFIG register, and whether or not the ROM or EEPROM is tested and guaranteed.

Features

• M68HC11 CPU

• Power Saving STOP and WAIT Modes

• 8 Kbytes ROM

• 512 Bytes of On-Chip EEPROM

• 256 Bytes of On-Chip RAM (All Saved During Standby)

• 16-Bit Timer System

— 3 Input Capture Channels

— 5 Output Compare Channels

• 8-Bit Pulse Accumulator

• Real-Time Interrupt Circuit

• Computer Operating Properly (COP) Watchdog System

• Synchronous Serial Peripheral Interface (SPI)

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

• 8-Channel, 8-Bit Analog-to-Digital (A/D) Converter

• 38 General-Purpose Input/Output (I/O) Pins

— 15 Bidirectional I/O Pins

— 11 Input-Only Pins and 12 Output-Only Pins (Eight Output-Only Pins in 48-Pin Package)

• Available in 48-Pin Dual In-Line Package (DIP) or 52-Pin Plastic Leaded Chip Carrier (PLCC)