DP83867E: Polarity detection and correction

Hi Gerome,

Thanks for your reply. Let me clarify your answer.

Gerome Cacho said:

The PHY will detect and correct polarity as needed per each channel. 

Does this mean TX side of DP83867E also have polarity correction? Although this is Microchip's app note, it states "For 10BASE-T links the IEEE 802.3 requires the Ethernet PHY to support autopolarity detection and correction of the received data.". So it seems that polarity detection/correction feature is supported by Rx side.

Also, what I'd like to confirm is that when Rx side detects reverse polarity, if the device automatically flip polarity of Tx side or not.

Best regards,

Shota Mago

Hello Shota,

What speed is the customer looking to use? In 1G, there is no explicit TX and RX on MDI. 

Is customer seeing an issue where the polarity is being swapped on TX due to RX?

Sincerely,

Gerome

Hi Gerome,

The customer accepted answer of "all PHYs that conform to IEEE802.3 should have this.".

So you can close the thread. Thank you so much for your support.

Best regards,

Shota Mago