Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

USB & EMAC I/O options

Is it possible to route the HPS USB I/O signals through the FPGA instead of using the dedicated HPS pins? In 13.1 you can only select HPS I/O pin multiplexing for the USB controllers. I'm guessing ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

For the EMAC routing to the FPGA and HPS pins are both valid options. For USB you can only route to the HPS pins because the USB protocol does not allow you to add any delay (so pipelining those signals in the FPGA is out of the question). The EMAC doesn't have this issue because you can pipeline the EMAC interface into the FPGA fabric without breaking the protocol.

Milan, for the RX issue if you have not already done so I recommend opening a service request to track that issue if it comes from the hardware libraries or Linux drivers.