i.MX6UL Ethernet and UART muxing

[surendrajadhav]

Hello,

I am using Ethernet 2 in RMII mode. Here ball No. G14(ENET2_TX_ER), I am using as a RMII error signal.

I am also using UART3, where the same pin(G14) is used as UART3_CTS. Since I am using G14 as ENET2_TX_ER, can I use UART3 port without CTS.

The i.MX processor tool(eclipse) is not giving error to use G14 pin as a ENET2_TX_ER.

I understand that if I am using UART3 signals like Tx, Rx and RTS, then I can not allow CTS to use for other purpose than UART. Please clarify my this understanding.

Best regards,

Surendra.

[surendrajadhav]

Dear Igor,

Thanks a lot for your reply.

As you said I can use UART3 port without CTS, but let me know if I can use G14(ENET2_TX_ER) as Transimt error in Ethernet.

Regards,

Surendra

[igorpadykov]

Hi Surendra

yes, one can configure it as gpio and use as "Transimt error".

Best regards
igor

[surendrajadhav]

Hello Igor,

Thanks again for your reply.

Here I want to clarify that I am not using the pin as a GPIO, but it belongs to Ethernet interface only.

Please see the attached file.

Regards,

Surendra

[igorpadykov]

Hi Surendra

please use IOMUX Chapter and verify that this pin could be used as gpio (it is more accurate)

i.MX6UL Reference Manual

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

Best regards
igor

[igorpadykov]

Hi Surendra

you are right one can use UART3 port without CTS, using it for other purpose.

Best regards
igor
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