Greetings, I'm designing a compound USB peripheral that will combine a USB sound card with two serial ports. My design objectives are in order:
- low component count
- small physical size
- low power consumption
- ideally it'd be powered from the upstream USB 2.0 interface.
Ideally there'd be minimal programming required although it would be nice to have the device readily and uniquely identifiable when they're plugged in.
At this stage I'm thinking of basing the design on:
- Future Technology FT2232H dual USB UART, and a
- Burr Brown/TI PCM2901 Audio Codec with USB interface
with an
- Alcor Micro AU9254
to bind them together.
I've had a bit of difficulty finding candidate USB hub ICs, I'm guessing I'm just not using the right search terms or something. I ended up with a couple, the Alcor seemed ok.
I've no previous USB design experience and I'd appreciate your input regarding:
- any potential traps or pit-falls to watch out for
- suggestions for other USB controller ICs to use
- any reference designs that I might plunder
regards Terry