Introduction

The MC68HC11ED0 is a low-cost member of the M68HC11 Family of microcontrollers (MCU). This MCU has a multiplexed address/data bus and is characterized by high speed and low-power consumption. The fully static design allows operation at frequencies from 3 MHz to dc.

Pin count is minimized for cost-sensitive applications. Because there is no on-chip read-only memory (ROM), this device is optimized for expanded-bus systems. On-chip serial peripheral interface (SPI) and serial communications interface (SCI) provide a convenient means or transferring data to and from internal random-access memory (RAM).

Features

Features include:

• M68HC11 CPU

• Power-saving stop and wait modes

• 512 bytes of RAM

• Multiplexed address and data buses

• Enhanced 16-bit timer with 4-stage programmable prescaler

– Three input capture (IC) channels

– Four output compare (OC) channels

– One additional channel, selectable as fourth IC or fifth OC

• 8-bit pulse accumulator

• Real-time interrupt circuit

• Computer operating properly (COP) watchdog

• Clock monitor

• Enhanced asynchronous non-return-to-zero (NRZ) SCI

• Enhanced SPI

• Eight bidirectional input/output (I/O) lines

• Three input-only lines

• Three output-only lines (one output-only line in 40-pin package)

• Packaging options:

– 44-pin plastic-leaded chip carrier (PLCC)

– 44-pin quad flat pack (QFP)

– 40-pin plastic dual in-line package (DIP)