imx6SL ethernet EMI problem

fisherhe — Thu, 06 Aug 2020 01:25:15 GMT

Hi,

I use imx6sololite and the ethernet topology is as blows:

Now there is EMI problem on ethernet coming from the clock(FEC_REF_CLK). Then I set the SRE of this pad to slow, but it has no help.

Is there any other metholds to decrease the EMI coming out of the ethernet clock.Will setting DSE bit useful?or other metholds suggested?

Many thanks.

Re: imx6SL ethernet EMI problem

Yuri — Thu, 06 Aug 2020 02:40:21 GMT

Hello,

The DSE bit field (drive strength) affects EMI environment.

The similar result may be achieved if use series resistor.

Regards,

Yuri.