At 03:30 PM 1/14/03 -0500, you wrote:
> >> What about using the PIC's built-in SPI and jellybean 74HC
>shift-registers,
> >> since speed is not a issue in your application.
>
>If I'm going to plop down a big parallel RAM (the smallest one I found is 32
>pins) I might as well connect to it in parallel.  I already have an 8 bit
>bus connected to a display so I could either connect an address latch and
>the RAM to that bus or switch to a 40 pin PIC which would give me enough I/O
>to have dedicated address lines.

I suppose, though that would make me think of using two shift-registers to
hold the address data. Only a few pins and pretty fast (just write the two
bytes to the SPI data register). DIP-40s are pretty big. I prefer PLCC44
for that size.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com

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