General Description

Introduction

The Motorola MC68HC05P18 and MC68HC805P18 microcontrollers (MCU) are members of the M68HC05 Family with:

   • 4-channel, 8-bit analog-to-digital (A/D) converter

   • 16-bit timer with output compare and input capture

   • Serial input/output port (SIOP)

   • Computer operating properly (COP) watchdog timer

   • 21 input/output (I/O) pins (20 bidirectional, one input-only)

  

Features

Features include:

   • Low-cost M68HC05 core running at 2-MHz bus speed

   • 28-pin dual in-line package (DIP) or small outline (SOIC) package

   • 4-MHz on-chip crystal/ceramic resonator oscillator

   • MC68HC05P18:

      – 8064 bytes of user read-only memory (ROM)

      – 48 bytes of page zero ROM

      – 16 bytes of user vectors

   • MC68HC805P18:

      – 8064 bytes of user electrically erasable, programmable read-only memory (EEPROM)

      – 48 bytes of page zero EEPROM

      – 16 bytes of user vectors

   • 192 bytes of on-chip random-access memory (RAM)

   • 128 bytes of EEPROM

   • Low-voltage reset (LVR)

   • 4-channel, 8-bit A/D converter

   • SIOP serial communications port

   • COP watchdog timer with active pulldown on RESET

   • 16-bit timer with output compare and input capture

   • 20 bidirectional I/O lines and one input-only line

   • High current sink and source on two I/O pins (PC0 and PC1)