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Dim_on
Newbie
Newbie
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Registered: ‎10-04-2020

JESD204 PHY v4.0 loopback

Hi! I'm using jesd204_phy v4.0. Vivado 2019.1. AXI4-Lite Management Interface is disabled.
I tried to turn on Near-end PMA Loopback by changing port "gt_loopback" from 12'd0 to constant 12'b010010010010 inside jesd204_phy, but loopback wasn't working  (I saw input RX signal instead had been sent TX)
What can I do to turn on loopback?

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