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DP83620: The default configuration

vrai fluss
Prodigy 130 points
Part Number: DP83620

I am looking at the MDIO/MDC interface to program the registers from FPGA, but the interface core is not ready yet.

wondering if no register configuration can work for 100BaseTX as default ? Firstly, try to work with TXCLK, TXEN, TXD[3:0] data between FPGA and DP83620 .

Will it work without an configuration through MDIO/MDC ?

the MAC Controller will send 32bit data format.. is there any data bit ordering to 4bit MII data format for DP83620?

Regards vrai

 

  • 0
    TI__Expert 5670 points
    Hi Vrai,

    With all the straps connected correctly, DP83620 should work without any MDC/MDIO configuration.

    For MII, transmission or reception of each octet is done a nibble at a time. Each octet is transmitted or received as 2 nibbles. Bit 0 thru 3 of the octet is corresponded to bit 0 thru 3 of the first nibble. Bit 4 thru 7 of the octet is corresponded to bit 0 thru 3 of the second nibble.

    Regards,

    Hung Nguyen