DP83825I: Compliance test fail

Please also share TI's evaluation results as well.  Thanks.

Hi Hironori,

Here is the app note to our compliance testing instructions and results.

http://www.ti.com/lit/an/snla239a/snla239a.pdf

http://www.ti.com/lit/an/snla266/snla266.pdf

Best,

Cecilia

Cecilia, You have attached wrong PID. I am asking on DP83825I.

Hironori Yoshimura

Please check attached file.  This is similar results on the TI's ref EVM.

Please kindly advise how to fix ?

DP8325_TI_EVA Bord.pdf

Hi Hironori,

Do you have a schematic of the design? You are not using the DP83825EVM, correct?

Thanks,

Cecilia

Two files are.  one is customer's own design and next result is on the TI DP83825I EVM results.

We are facing same results. probably we have to adjust something Register setting ? 

Hi Hironori

Yes that could be one possibility. Can you please share the register settings for both boards? Also can you confirm you are using the correct RBIAS value at 1% tolerance?

Thanks,

Cecilia

> 100 Base Standard MDI (Test Mode 5)

>             Reg 0x001F = 0x8000 //reset PHY

>             Reg 0x0000 = 0x2100 //programs DUT to 100Base-TX Mode

>             Reg 0x0010 = 0x5008 //programs DUT to Forced MDI Mode

>             Reg 0x0009 = 0xBB00 //Test Mode 5

>             Reg 0x0025 = 0x0480 //output test mode to all channels

RBIAS is 1%.

Can you read all values? I would like to review all registers and in particularly register 0x0403.

Thanks,

Cecilia

Customer only control Test register as mentioned above. That all.

I could not find 0x0403 from datasheet register map.  What is looking for ?

Please specify specfic register what you want to see.  My customer just applied TI's EVM and it is failing as attached waveform.

Any suggestions , please advise me. 

I see that you have only written into those registers that you mentioned above, however, are you able to read all registers? Register 0x0403 should help with the line driver voltage swing which would help your compliance failure.

Thanks,

Cecilia