8M Mini RMII.TX_ERR signal

[adevries]

Hello,

On page 41 of the 8M Mini datasheet, it says that pad ENET_TXC can be put in ALT1 mode and output signal RMII.TX_ERR. However, RMII doesn't use a TX_ERR signal. Is this a mistake? How should I be using this signal when connecting up an Ethernet PHY using RMII?

Thanks

[Yuri · Accepted solution]

Hello,

   from RMII specs:

"... in switch applications there is no need for TX_ER since a MAC will never generate errored data.

The one case where TX_ER is used is with repeaters that need to ensure propagation of errors."

Have a great day,
Yuri

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[adevries]

Hi Yuri,

Thanks for the response. Can you tell me which RMII specification you are referencing? That sounds like a document I would find useful.

Thanks

[Yuri]

Hello,

  look at the following, page.2.

  http://ebook.pldworld.com/_eBook/-Telecommunications,Networks-/TCPIP/RMII/rmii_rev12.pdf 

Regards,

Yuri.

[adevries]

Great, thanks for the information!