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So my current thought is to try the new DEO-nano-SoC, which has built-in microSD and high speed USB
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This is a newly released board, so the documentation on how to use it might be sparce or incomplete. Terasic have had the DE1-SoC and SoCKit released for a while though, so there should be enough examples for those boards.
Assuming the DE-nano-SoC can be powered from USB (I haven't checked), it should be worst-case 5V@500mA, i.e., 2.5W. I suspect it can be made to fit within your 2.5W budget. You could always test a board to see what its power requirements are, or contact Terasic and ask them.
The fact that you need to use both the FPGA and USB makes the DE0-nano-SoC sound like a reasonable fit. The other option would be an Arrow BeMicro-SDK and use Ethernet. Its a smaller PCB than the DE0-nano, but perhaps the Ethernet connector is too large?
Cheers,
Dave
Honored Contributor
