i.MX ProcessorsのトピックRe: RGMII to RGMII connection

RGMII to RGMII connection

niteshsahay — Thu, 11 Aug 2016 11:47:42 GMT

In my project i am planning to have MAC to MAC communication (i.e. RGMII) with MCIMX6QP6AVT1AA.

Any idea on how to connect the pins for MAC to MAC communication.

Regards

Nitesh

Re: RGMII to RGMII connection

Pavel — Fri, 12 Aug 2016 05:28:47 GMT

Look at the following document:

http://www.nxp.com/files/ftf_2010/Americas/WBNR_FTF10_NET_F0568.pdf

Find the "RGMII without a PHY" in this document.

The i.MX6 requires external signal ENET_REF_CLK.

The following connection is needed:

i.MX6 <=> i.MX6

TXDx => RXDx

RXDx <= TXDx

TX_EN => RX_DV

RX_DV <= TX_EN

TX_ER => RX_ER

RX_ER <= TX_ER

Have a great day,
Pavel Chubakov

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Re: RGMII to RGMII connection

niteshsahay — Thu, 18 Aug 2016 02:59:56 GMT

Hi Pavel

Thanks for the reply.

I am attaching one file can you please help me out in cross verifying the connections i have made for my board (i.e. MAC to MAC).

Another one query regarding TXC and RXC clock i.e. 125MHZ clock will be externally given or how it is?

BR\Nitesh

Re: RGMII to RGMII connection

Pavel — Thu, 18 Aug 2016 03:16:05 GMT

Yes, External 125 MHz clock source is needed. Find the "RGMII without a PHY" in the following document:

http://www.nxp.com/files/ftf_2010/Americas/WBNR_FTF10_NET_F0568.pdf
Have a great day,
Pavel Chubakov

Re: RGMII to RGMII connection

niteshsahay — Thu, 18 Aug 2016 12:31:45 GMT

Hi Pavel

Thanks for the reply.

One query on Clock:

1) Only single oscillator can be used to generate 125 MHz for TXC and RXC or two different oscillators are used to connect TXC and RXC.

2) Can we have one zero clock delay to generate two output which will be individually connected to TXC and RXC.

BR\Nitesh

Re: RGMII to RGMII connection

Yuri — Tue, 08 Aug 2017 01:44:21 GMT

Hello,

it is enough to provide common for both i.MX6 parts ENET_REF_CLK.

Regards,

Yuri.

Re: RGMII to RGMII connection

RichG — Wed, 15 Dec 2021 22:17:15 GMT

Hello,

Is there a better link to the document that is referenced in this topic? The link appears to be broken. I'm looking at using an RGMII to RGMII connection between two i.MX8QM processors - I assume that will work similarly? Also, is there anything special that I need to do regarding the software? Since there is no MDC/MDIO connection I'm guessing there might be.

Thanks so much,

Rich