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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)