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JDeff's avatar
JDeff
Icon for New Contributor rankNew Contributor
5 years ago

TSE MAC phy MDIO write not working.

I am able to read register 0 of my phy by initiating a read command to address xA0 in the Avalon bus. the result is x1140. However if I try to write to this same address, no MDIO transaction takes pl...
Deshi_Intel's avatar
Deshi_Intel
Icon for Regular Contributor rankRegular Contributor
5 years ago

Hi,

I noticed you are accessing mdio space 1 address 0xA0 instead of address 0x080 is due to you are using the address space for PCS function already ?

Some of the factor that I think maybe affecting your mdio write access is like below

  1. TSE IP MDIO host clock divisor setting - ensure MDC clock frequency does not exceed 2.5MHz
  2. External PHY Initialization using MDIO address -> TSE MAC Base Configuration Reg
  • 0x0f for mdio_addr0
    • 0x10 for mdio_addr1
    • have you initialize and configure mdio_addr1 to correct PHY chip address before you perform wrire/read access ?
  1. Did you connect MIDO output enable connection for "mdio_oen" port, correctly ?

Thanks.

Regards,

dlim