Introduction

The MC68HC05C8A is an enhanced version of the MC68HC05C8. It includes keyboard scanning logic, a high current pin, a computer operating properly (COP) watchdog timer, and read-only memory (ROM) security feature.

Features

? M68HC05 core

? Single 3.0- to 5.5-volt supply

? Available packages:

– 40-pin dual in-line (DIP)

– 42-pin plastic shrink dual in-line (SDIP)

– 44-lead plastic leaded chip carrier (PLCC)

– 44-lead quad flat pack (QFP)

? On-chip oscillator for crystal/ceramic resonator

? Fully static operation

? 7744 bytes of user ROM

? ROM security feature

? 176 bytes of on-chip random-access memory (RAM)

? Asynchronous serial communications interface (SCI) system

? Synchronous serial peripheral interface (SPI) system

? 16-bit capture/compare timer system

? Computer operating properly (COP) watchdog timer

? 24 bidirectional input/output (I/O) lines

? Seven input-only lines

? User mode

? Self-check mode

? Power-saving stop and wait modes

? High current sink and source on one port pin (PC7)

? Mask selectable external interrupt sensitivity

? Mask-programmable keyscan logic