"Jasen Betts" wrote in message
...
On 2009-04-04, DEAU wrote:
Does anyone know where I can find some of the interface adapter chips
used
in those USB-to-SD card adpaters? This looks like it transparently
converts
USB data into SD (or possibly SPI) protocol to write/read to/from the SD
card.

Does anyone know more about these chips?

they convert SD (either serial or parallel) to "usb-storage"
they can probably not be used as generic SPI interfaces.



I really don't need to have them do any more (or less) than they already do,
though. We have an application which needs a USB to microSD interface.
We've been using the standard USB SD Card Reader (basically the USB -- SD
card module) with a Sandisk SD to microSD adapter card and putting the
microSD card into the adapter. That works. We're just trying to reduce the
number of mechanical connection points by implementing the USB to microSD
card socket directly.

I found one of the chips on my adpater module (the Alcor AU6331). Are there
other chips available?

Thanks.


Dave