New Microchip PIC processor.

[David A. Cooley]

At 05:16 PM 6/8/99 -0700, you wrote:

>
>really?  that's interesting.  i guess i didn't think that they could hack it 
>b/c
>they run at about 2MHz, don't have a lot of I/0 lines (unless you get the 52 
>pin),
>and were generally pretty old.  i guess that's my fault.  i figured that 
>there were
>better out there.
>so, let me rephrase that, HC11's could hack it, but they can be improved upon.


GM's use in 93 and up is the HC11F1... Lots of A/D, IO, address space
etc... they run the external clock and 12.something MHZ... internal is 4MHz
at that external rate...  Up until OBD_II, data I/O from the HC11 based
PCM's was 8192 baud... OBD_II is 10.4KBPS VPW.
Most of the later PCM's have 2 CPU's (Both HC11F1's).. I believe one is
dedicated to nothing but spark control.
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           David Cooley N5XMT           Internet: N5XMT at bellsouth.net
     Packet: N5XMT at KQ4LO.#INT.NC.USA.NA   T.A.P.R. Member #7068
   Sponges grow in the ocean... Wonder how deep it would be if they didn't?!
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