add 33Ohm series termination resistors at the RGMII output lines that go to the FPGA

elhep / SPEC_A7_Management

A plugin board for WR node management with ARM processor, SFP and RJ45

1 stars 0 forks source link

Closed gyorka closed 2 months ago

gyorka commented 3 months ago

at spec_a7 fpga_34.schdoc there are 33R resistors at RGMII TX lines, should we add 33R resistors at RX lines here? or its already good as it is?

gkasprow commented 3 months ago

Oh, the resistor on SPEC side are on wrong lines, FPGA Tx means input; Add them on Tx lines on your side

gyorka commented 3 months ago

so I should also connect TX to RX port and vice versa?

gkasprow commented 3 months ago

No, follow Ethernet rules; Rx connects with Rx, Tx with Tx; use source ermination on your output signals

gyorka commented 2 months ago

done