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Internal 125 MHz clock to ENET_REF_CLK

Question asked by siva nageswararao on Dec 27, 2018
Latest reply on Dec 28, 2018 by igorpadykov

Hi

I'm using imx6dl processor in which mac is connected to phy(ksz9031) in RGMII mode. I'm facing an issue with hardware time stamping.

I want to feed the125 MHz clock to ENET_REF_CLK internally through GPIO_16 .

As per the  Table 2-9. Gigabit Ethernet Recommendations  from the below pdf

http://cache.freescale.com/files/32bit/doc/user_guide/IMX6DQ6SDLHDG.pdf

 

I have configured GPR1[21] = 1 to select internal reference clock, through which I'm getting 50MHz clock on to GPIO_16.

Now i want to route the 50MHz clock from GPIO_16 to ENET_REF_CLK internally. 

Is it necessary to connect ENET_REF_CLK(V22) pin to GPIO_16(R2) pin externally?

                                             or

 Configuring GPIO_16 SION = 1  is enough to route internally?

 

Regards

siva

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