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From: hpoppe@ncar.ucar.edu (Herb Poppe)
Newsgroups: sci.electronics
Subject: Motorola Microcontrollers
Message-ID: <10183@ncar.ucar.edu>
Date: 5 Feb 91 16:24:37 GMT
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Organization: National Center for Atmospheric Research
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I'm in the market for small quantities of a moderately priced single chip 
microcontroller with an async serial port and modest onboard program 
EEPROM. The selection of Motorola MCUs in the latest Active catalog caught 
my eye but my Motorola library is dated and I don't know how these chips 
differ.

I would appreciate if someone could point out the differences among the 
following devices:

MC68HC11A0FN
MC68HC11A1FN
MC68HCP11A1FN
MC68HC11E1FN

MC68HC11A0P
MC68HC11A1P
MC68HCP11A1P

What is the maximum frequency crystal that can be used with these MCUs.

I recall some comments here that some devices in the 68HC11 series cannot 
(or can with great difficulty) be programmed/run with only the internal 
EEPROM. I would appreciate hearing more detailed comments along these 
lines.

These devices are priced between $10.90 and $34.50. Can you recommend 
other devices in this price range that sport async serial I/O and modest 
onboard program EEPROM that are readily available?

The Active catalog also mentions the

MC68HC705C8FN
MC68HC705C8P

Are these really OTP EPROM devices, or are they windowed?

Herb Poppe             hpoppe@ncar.ucar.edu
NCAR                      (303) 497-1296
1850 Table Mesa Dr.
Boulder, CO  80307-3000