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