iMX8M-Enet_TxC setting

[riteshpatel]

Hi,

I am working on Custom board design based on the iMX8M processor & planning to interface KSZ9031RNX Ethernet PHY over Enet MAC.

I have used the same PHY, KSZ9031, with iMX6Q on another board. IMX6D/Q processor has a dedicated pin, ENET_REF_CLK, to accept 125MHz external clock from PHY to generate Transmit CLK at iMX6 MAC.

The iMX8M doesn't have a reference clock input pin. So the Tx_CLK will be generated by iMX8M & it will be used by PHY to generate a receive CLK for MAC.

How to configure ENET_TXC pin to generate Transmit CLK for PHY?

Thanks.

[giacomobiancala]

Hi All,

I am developing a custom board based on iMX8 MINI and PHY KSZ9031RNX.

Is CLK125_NDO signal used only for 'single LED" or "Dual led" setting at power up?

No connection with iMX8M processor?

Thanks

Giacomo

[igorpadykov]

Hi Ritesh

for enet clock setection one can look at register

IOMUXC_GPR_GPR1. described in sect.8.2.4.2 GPR1 General Purpose

Register (IOMUXC_GPR_GPR1) i.MX8MDQ Reference Manual
https://www.nxp.com/docs/en/reference-manual/IMX8MDQLQRM.pdf

Best regards
igor
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