MC68711E20CFNE3  Description

This document contains a detailed description of the M68HC11 E series of 8-bit microcontroller units (MCUs). These MCUs all combine the M68HC11 central processor unit (CPU) with high-performance, on-chip peripherals. The E series is comprised of many devices with various configurations of Random-access memory (RAM) Read-only memory (ROM) Erasable programmable read-only memory (EPROM) Electrically erasable programmable read-only memory (EEPROM) Several low-voltage devices are also available. With the exception of a few minor differences, the operation of all E-series MCUs is identical. A fully static design and high-density complementary metal-oxide semiconductor (HCMOS) fabrication process allow the E-series devices to operate at frequencies from 3 MHz to dc with very low power consumption. 

MC68711E20CFNE3  Features

Power-saving stop and wait modes

Low-voltage devices available (3.0–5.5 Vdc)

0, 256, 512, or 768 bytes of on-chip RAM, data retained during standby

0, 12, or 20 Kbytes of on-chip ROM or EPROM

0, 512, or 2048 bytes of on-chip EEPROM with block protection for security

2048 bytes of EEPROM with a selectable base address in the MC68HC811E2

Asynchronous non-return-to-zero (NRZ) serial communications interface (SCI)

Additional baud rates are available on MC68HC(7)11E20

Synchronous serial peripheral interface (SPI)

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

16-bit timer system:

– 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