Ethernet failure issue

[vineethhegde]

I am testing a board based on i.MX6Q processor. in that ethernet ping test is failed. The component mounting is done as per the  schematics. And every voltage , clock frequency are proper. Please suggest the solution.

[igorpadykov]

Hi vineeth113

first check 125MHz clock, it should be outputed from ethernet phy and should have

correct duty cycle, if not, then you have to use a 125MHz oscillator for both i.MX6

and phy, the tolerance is +/-50ppm. Please check timings described in sect.4.11.5.3

RGMII Signal Switching Specifications IMX6DQCEC with oscilloscope

ENET_REF_CLK (ball V22) duty-cycle requirements on i.MX6

Best regards

igor

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[vineethhegde]

in that same board Ethernet phy IC is replaced then also issue persist.

[igorpadykov]

measure Ethernet phy timings using oscilloscope and

check with datasheet requirements