I have been searching for many hours now, without success.
Does anyone know of a source for small quantities (5+) of
SDIO cards that actually do I/O? As in 8-16 digital bits
and /or a couple analog ins/outs?

I can find lots of SDIO GPS cards, and a few Wi-Fi cards,
but there just doesn't seem to be an "I/O"  SDIO card out there.

SDIO is an extension to the the Secure Digital Flash memory card
spec that includes serial and parallel I/O.

We want a simple graphical touch screen interface for disabled users,
and PDA's seem to have the availability and horsepower needed
for a few off application, but I need to be able to read 5 analog
channels (10bit, sub kiloHz ok) and 4 digital in and out.

Any suggestions on how to do I/O in something like a PDA? (Win CE).

I'm thinking I could just hang a PIC off one, but most PDAs
only do CLIENT mode USB so getting a USB connection to work would
be a PITA, and serial ports are now nonexistent.

Bluetooth might be an option, except that it's power hungry and
also a PITA to program for.

Thoughts?

Robert

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