PIC Questions

Orin Eman orin at wolfenet.com
Wed Nov 4 01:45:06 GMT 1998


> For us novices, could you briefly explain what a PIC is exactly and describe

This has now been well covered!

> (manufacturer / model / part#) the board you mention.  Also a brief

Manufacturer: me
Model: "the data aq board"
Part #: don't have one ;)

It's an Audi 5 cylinder turbo engine specific board, though it could
be adapted to other Bosch engine management systems.  It aquires
ignition timing, a couple of duty cycles, 3 temperatures via
thermocouples and some analog values.  These are displayed on
an LCD (2x20) and dumped to serial.

> explanation of why you would prefer the PIC board to the HC11 (assuming you
> could find an HC11 board).

Advantage to the PIC is that you need no external components other than
a crystal and a couple of caps to make it run.  HC11 needs RAM at least
(onboard probably not enough) and probably EPROM for final program.
Thats two 28 pin or so chips as well as the CPU.  Yes, there are HC11s
with onboard EEPROM, but it is too small to be really useful for code.

Orin.



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