Is it possible to feed the MAC with 125MHz clock internally when using RGMII?

[MicMoba]

Hello,

I use the RGMII interface of my i.MX6Q to connect a 100Mbps PHY. Currently I generate a 125MHz clock by the ANATOP (Analog Ethernet PLL) put it out on GPIO16 (GPIO7_IO11 -> Ball R2) do a wire connection between GPIO16 and ENET_REF_CLK (GPIO1_IO23 -> Ball V22) and feed the MAC.

Is it possible to route the 125MHz interally to the ENET_REF_CLK?

In RMII mode this is possible. Hardware Development Guide 12.4.1:

I my opinion the block labeled "ENET" is different from the ENET_REF_CLK which is used in RGMII mode. I don't need the 125MHz outside the i.MX6.

[igorpadykov]

Hi Michael

>Is it possible to route the 125MHz interally to the ENET_REF_CLK?

not, sorry.

So one can follow below answers:

using GPIO_16 pin as reference clock in RGMII 

https://community.nxp.com/message/425444#425444 

Best regards
igor
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[MicMoba]

Thanks Igor for the fast reply