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MC68711E20CFNE3 Datasheet, PDF (13/242 Pages) – | |||
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Chapter 1
General Description
1.1 Introduction
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.
1.2 Features
Features of the E-series devices include:
⢠M68HC11 CPU
⢠Power-saving stop and wait modes
⢠Low-voltage devices available (3.0â5.5 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 protect for security
⢠2048 bytes of EEPROM with selectable base address in the MC68HC811E2
⢠Asynchronous non-return-to-zero (NRZ) serial communications interface (SCI)
⢠Additional baud rates available on MC68HC(7)11E20
⢠Synchronous serial peripheral interface (SPI)
⢠8-channel, 8-bit analog-to-digital (A/D) converter
⢠16-bit timer system:
â Three input capture (IC) channels
â Four output compare (OC) channels
â One additional channel, selectable as fourth IC or fifth OC
⢠8-bit pulse accumulator
⢠Real-time interrupt circuit
M68HC11E Family Data Sheet, Rev. 5.1
Freescale Semiconductor
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