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DP83620: Simple question: TX_ER PIN not available on DP83620

user4684403
Prodigy 150 points
Part Number: DP83620

I found Ethernet PHY chip DP83620 has no TX_ER pin, I am trying to match it with NXP power MCU MPC855, will that be an issue? how to solve?

  • 0
    TI__Mastermind 26320 points
    TX_ER is optional signal in MII interface. This signal allows the system MAC to force the Phy to deliberately corrupt the transmitted packet by inserting bad symbol codes. A similar function can be accomplished by having the MAC signal the PHY to stop transmission mid-packet. By stopping mid-packet, the receiving node will interpret the packet as having a bad CRC. Upper layers can then decide to receive or reject the packet in question. Since the function of aborting a transmit packet is more easily attained with the latter method, the TX_ER pin is not needed.

    Regards,
    Geet