AWR2944EVM: What is meaning of every bit ALIVE_REG register

Rata Zhang

Expert 2840 points

Part Number: AWR2944EVM

Tool/software:

Hi，

What is meaning of every bit ALIVE_REG register？ The ALIVE_REG is as belows:

If the bit0=1.It means the PHY address is 0, bit1=1, it means PHY address is 1 and so on, is that right?

Rata

over 1 year ago

0 shruti gupta over 1 year ago

TI__Genius 11130 points

Hi Rata,

Please check this section in TRM for more insights on MDIO

Regards,

Shruti

0 Rata Zhang over 1 year ago in reply to shruti gupta

Expert 2840 points

Hi Shruti,

Thanks for your reply. I have another question. For example, on the AWR2944EVM, DP83tc812 is used as PHY drivers, if the bit 1 of ALIVE_REG register is 1, does it mean that DP83tc812 PHY address is 1?In other words, the bit value of ALIVE_REG can indicate PHY address ID, is that right?

BR,

Rata

0 shruti gupta over 1 year ago in reply to Rata Zhang

TI__Genius 11130 points

Hi Rata,

MDIO module will poll for the bits to check any PHY is connected to it. Once the PHY acknowledges the link it will update the respective bit of the MDIO_ALIVE register.

For example, if PHY acknowledges the address 5, then 5th bit of the ALIVE register will be set, similarly if address 30 will get acknowledged, then 30th bit of the ALIVE register will be set. For your example, if bit 0 is set, that means Phy address 0 have got acknowledged.

Regards,

Shruti

0 Rata Zhang over 1 year ago in reply to shruti gupta

Expert 2840 points

Hi Shruti,

Thanks for your reply, I got it.

BR,

Rata

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AWR2944EVM: What is meaning of every bit ALIVE_REG register