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DP83869HM: ibis model for RX_CLK

Noriyuki Takahashi
Genius 11000 points
Part Number: DP83869HM

Hi team,

Could you share ibis model for RX_CLK?

It seems that the model may be one of followings but not sure which one is correct.

gpio_0000_2p5    2.5V     Digital I/O

gpio_0001_2p5    2.5V     Digital I/O

gpio_0010_2p5    2.5V     Digital I/O

gpio_0011_2p5    2.5V     Digital I/O

gpio_0100_2p5    2.5V     Digital I/O

gpio_0101_2p5    2.5V     Digital I/O

gpio_0110_2p5    2.5V     Digital I/O

gpio_0111_2p5    2.5V     Digital I/O

gpio_1000_2p5    2.5V     Digital I/O

gpio_1001_2p5    2.5V     Digital I/O

gpio_1010_2p5    2.5V     Digital I/O

gpio_1011_2p5    2.5V     Digital I/O

gpio_1100_2p5    2.5V     Digital I/O

gpio_1101_2p5    2.5V     Digital I/O

gpio_1110_2p5    2.5V     Digital I/O

gpio_1111_2p5    2.5V     Digital I/O

Regards,

Noriyuki Takahashi

  • 0
    TI__Expert 5425 points

    Hi Takahashi-san,

    I will need to consult with my team about this. I can get back to you by Thursday at the latest. If it takes longer, I will let you know. Thank you for your patience.

    Regards,

    Adrian Kam

  • 0 in reply to Adrian Kam
    TI__Expert 5425 points

    Hi Takahashi-san,

    In the IBIS file, the RX_CLK pin is assigned a model name called "gpio", which is what you have listed. Each row is a different model of the RX_CLK pin. They are different by VDDIO voltages (although from your list it is all 2.5V) and the 4-bits represent the impedance control on the pin. You can choose one of the models do use depending on what impedance control configuration is optimal for your system. In register 0x170, Bits[4:0] control the impedance of the MAC pins, including RX_CLK. The bits in the model name correspond to Bits[4:1] of register 0x170. Bit[0] will always be 0 for the model.

    Regards,

    Adrian Kam