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AM3354: CHANGE phy FROM DP83848KSQ/NOPB to DP83822IFRHBT,but the PHY not works.

user4973896
Expert 1555 points
Part Number: AM3354
Other Parts Discussed in Thread: DP83822IF

  Based on the 3354 platform, the previous PHY is DP83848. The reset is controlled by power-on reset and GPIO through AND gate. Now the replacement to DP83822 is only controlled by gpio. The program has not changed. After the replacement, the PHY does not work. The phy pin configuration is the same, but it doesn't work. The computer display can recognize, RXER, RXDV, RX[1:0] have signals, but TXEN, TX[1:0] have no signal.

The network port of the board is directly connected to the computer. After uboot is loaded, the status of the network card is as shown below.

Why is the hardware configuration PHY address is 00011, the actual software reads out 00111, why is it inconsistent?7853.question.pdf

  • 0
    TI__Mastermind 23675 points

    Hi,

    For the DP83822IF configuration, are all the LED_LINK and LED_ACT passive components confirmed to be NC?

    It is not possible for the PHY Address to be 0x00111. There are only 0x0 to 0x1F possible PHY Addresses.

    Can you please read register 0x0 to 0x1F as well as 0x467 and 0x468?

    For 0x467/8 you need to use extended register access.