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by 15155 807 days ago
Implementing NICs in FPGAs (typically with PCIe attachment) is super common.

Regarding USB: CDC-NCM isn't hard to implement in any MCU but implementing a USB HS PHY basically requires ASIC hardware.

If you use a $0.30 USB HS ULPI PHY, one could implement USB CDC-NCM in an FPGA pretty easily.