Introduction

The MC68HC05E1 is a low-cost introduction to the M68HC05 Family of microcontrollers (MCUs). The HC05 CPU core has been enhanced with a 15-stage multi-functional timer and programmable phase-locked loop. The MCU is available in a 28-pin package, and has two 8-bit I/O ports and one 4-bit I/O port. The 8 Kbyte memory map includes 368 bytes of RAM and 4096 bytes of user ROM.

Features

Features of the MC68HC05E1 include:

• Low cost

• HC05 Core

• 28-pin package

• On-Chip Oscillator (Crystal or Ceramic Resonator)

• Phase-Locked Loop (PLL) Synthesizer with Programmable Speed

• 4112 Bytes of User ROM (including 16 Bytes of User Vectors)

• 368 Bytes of On-Chip RAM

• 15-Stage Multi-functional Timer with Programmable Input

• Real Time Interrupt Circuit

• COP Watchdog Timer Mask Option

• Custom Periodic Interrupt Circuit

• 20 Bidirectional I/O Lines

• Single-Chip Mode

• Self-Check Mode

• Power Saving STOP and WAIT Modes

• Edge-Sensitive or Edge- and Level-Sensitive Interrupt Trigger Mask Option

• STOP Instruction Disable Mask Option

• Illegal Address Reset