IMX6UL EVK ethernet RMII Mode clock(50MHz) query?

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IMX6UL EVK ethernet RMII Mode clock(50MHz) query?

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ramesh6663
Contributor III

we are using IMX6UL processor which has support RMII mode. Here my Query is Processor can provide 50Mhz output clock to Ethernet PHY Xtal in pin?

If processor can't provide 50MHz clock O/P to Ethernet PHY, we will go for External Oscillator

Where this mentioned in Datasheet, I tried but i didn't get it. Could you please help us on this?

Thanks & Regards,

Rameshkumar

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igorpadykov
NXP TechSupport
NXP TechSupport

Hi Rameshkumar

yes processor can provide 50Mhz output clock to Ethernet PHY,

please check IOMUXC_GPR_GPR1 register settings

ENET_TX_CLK_DIR, ENET1_CLK_SEL sect.30.4.2 GPR1 General Purpose

Register (IOMUXC_GPR_GPR1) i.MX6UL Reference Manual

http://cache.freescale.com/files/32bit/doc/ref_manual/IMX6ULRM.pdf

Best regards
igor
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