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Altera_Forum
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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
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12 years ago

Regarding the routing of the EMAC, I have not tried yet as I do not get the function of the loan IO signals (loan_io_in/out/oe hps_io_hps_io_gpio_inst_LOANIO20). What do each signal represent? I did not find any documentation on it. Also, did you use a GMII to RGMII converter? If yes, could you point me to the IP you used?

I saw in an other thread (http://www.alteraforum.com/forum/showthread.php?t=41652&highlight=loan+io) that Loan IO are only for low speed signals. In this case, as Milan mentionned, EMAC at 1 Gbps may not work.