68HC11 Learning tools (AKA re:trans)

[FJB203 at aol.com]

In a message dated 97-01-19 15:44:10 EST, you write:

> The great advatage for HC11 is that there are *VERY* good C-compilers out 
> there, both freeware & buyware and it can handle 64 k of memory in expande 
> mode (the 68HC11K4 handles 1M with intergrated bankswitch). It also comes 
> with A/D converter, EEprom and lots of timer functions.

Its a solid processor, and you are right, being able to disable the internal
rom/ram and use external components make programming a helluva lot easier.
 Using 2764's, 27128's, etc are a great way to store code since readily avail
eprom burners are there.

Also, to anyone who is going to be writing a lot of code, and changing it
often for testing, Dallas Semiconductor makes a 27256 compatible STATIC RAM
chip, typically used for EISA PC's to store their EISA configuration, but its
pin compatible with the 27256 series eproms, and you can change your code
easier and quicker.  Plus, you can change one byte or group of bytes without
having to erase the whole chip.

I've been using them for about two years now, and they work great.  They also
can be used as RAM chips for the 68HC series microprocessors, having the
advantage is after power off, information can be stored and retained.  I
originally though of using these for odometer readings on a digital dash
project I'm about to start, however there are plenty of auto applications
where retaining history or engine data after the vehicle is off might prove
useful.

Just an idea.

Frederic Breitwieser
If at first you don't succeed, skydiving is not for you

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