This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DP83867IR: Polarity reversal function

Part Number: DP83867IR

Hi Team,

According to datasheet 8.6.15 PHY Status Register (PHYSTS)

BIT NAME:WIRE_CROSS

Crossed Wire Indication:
Indicates channel polarity in 1000BASE-T linked status. Bits [5:2]
correspond to channels [D,C,B,A], respectively.
1 = Channel polarity is reversed.
0 = Channel polarity is normal.
However, is this polarity reversal function only for reversal detection?
Or is the polarity reversal processed and the data processed normally?

When connecting each channel to the connector, I reversed the P and M connections for each pair.
but it looks like auto-negotiation is completed.
  • Hi Yang,

    This pin only can read or detect rather there is a reverse polarity for each channel. Our PHY have auto polarity swap feature where we can swap the polarity if the polarity is reverse. Therefore you are still able to perform auto-negotiation complete.

    --

    Regards,

    Hillman Lin