Are there any development boards with USB 3 support? I'm trying to prototype a USB C monitor sink but having trouble finding a board that has the power necessary to receive DisplayPort over USB.
There is not much power needed to receive DisplayPort over USB (assuming you already can receive displayport signals or just route them to an external monitor).
You just need to implement an USB billboard device (optional to make it work, but required by the spec IIRC) and signal the correct alternate function. Then DisplayPort signalling will be present on the USB-C plug. Then just connect the right AUX wires to the DisplayPort connector.
This device is not really suited, it is a high speed USB3.0 peripheral. You might be able to use it with the right software, but then you are just using the CPU in it.
The way how the Cypress FX series works (and for that matter majority of non-trivial USB-to-something chips do) is that there is a bunch of DMA-capable peripherals inside and the in fact ridiculously underpowered CPU core inside only sets up the required configuration for the DMA transactions to happen.
