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DP83867IR: DP83867IR has probloem when sending big packets

user4215035
Intellectual 620 points
Part Number: DP83867IR

Hi,

   Excuse me, we use TI DP83867IR Ethernet PHY chip.

    At present, we often lose packets when sending big packets (1024byte), but there is no problem when sending small packets (64byte).There will be no problem in receiving packets.

    I wonder where there is a problem in configuration. Could you help me analyze it?Thank you very much!

  • 0
    TI__Mastermind 19780 points
    Hi user,

    I need a lot more details about your problems.

    If you are losing packets when sending big packets, this usually indicates some problem with a FIFO underflow or overflow. Can you provide a schematic and memory dump of registers 0x0 to 0x1f?

    Also please measure the frequency of the TX_CLK and the frequency of the RX_CLK. These should be within 100ppm of each other at a maximum. If the ppm is greater than this, then the FIFO is likely having a problem.

    Best Regards,