James Newton wrote:> > Why not 28 pin PIC16F72 with I2C and SPI?> > You c=
an program it to handle data in virtually any way.> > It eats 20 micro am=
p at 3V 32 kHz (You didn't specify> > speed)> >> That is most likely a mu=
ch better suggestion and one that I had already> passed on. The noises th=
at I hear when I say that are about not having a PIC> programmer availabl=
e (but I do and I can write the code for it) and a lack> of human program=
mer time (but I have ready made code for it)>> I think I've got them conv=
inced to use the standard shift registers...

Microchip has cheap almost standard I2C registers (based on PIC16F72,I'd =
suggest):
MCP23016   16-Bit I2C=99 I/O Expander.
Mike.
--=20
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