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DP83869HM: Problem communication with DP83869HM

pascal brand

Prodigy 70 points

Part Number: DP83869HM

Hi,

I am using a DP83869HM and i need to use the MDIO/MDC to configure registers.

My problem is the data i read are not coherant with what i shoud have and that i don't read what i have writen.

For example in the register 0x18, i should read 0x6150 but i read 0xC71F. And after writing 0x6150 I still read 0xC71F.

I join a screenshot of my transmission.

Write register 0x18 (0x6150) :

Read register 0x18 (0xC71F) :

Thank you for your help

Pascal

over 4 years ago

0 Cecilia Reyes over 4 years ago

TI__Genius 9920 points

Hi Pascal,

It seems you have asked this question twice. Please delete or close one of the threads and select which question for us to answer.

Thank you.

Cecilia

0 pascal brand over 4 years ago in reply to Cecilia Reyes

Prodigy 70 points

Hi Cecilia,

Indeed I did post the message twice by mistake. You can answer on this thread.
I have not found a way to delete the other one.

Regards

Pascal

0 pascal brand over 4 years ago in reply to pascal brand

Prodigy 70 points

I finally solved my problem. I was using 5V instead of 3.3V on my MDC bus.