[DP83849IF] pin configurations for single port

Takahiro Ogo

Other Parts Discussed in Thread: DP83849IF

Hi,
I have a question about DP83849IF pin configurations.
My customer will use DP83849IF on their standard board.

But, depending on their product, they will just use single port in DP83849IF.
So, even if DP83849IF have dual port, they will use it as single port eher phy.

At that time, how we configure the unused pins?
When Port A is NOT used, XXX_A pins are okay to be left unconnected?

Best Regards,
Taka

over 9 years ago

0 Takahiro Ogo over 9 years ago

Genius 5940 points

Hi,
Can anybody tell me?

Best Regards,
Taka

0 Ross Pimentel over 9 years ago in reply to Takahiro Ogo

TI__Mastermind 23675 points

Hi Taka,

For the 849 you can leave the pins unconnected and then use the associated int/pwdn pin to disable the one not being used.

Kind regards,
Ross

0 Takahiro Ogo over 9 years ago in reply to Ross Pimentel

Genius 5940 points

Hi Ross,
Thank you for your reply. Please let me check again to be sure.

My customer are worried about PMD pins and TXD/TXD_EN pins.
They becomes input pins. But they don't have internal pull-up or pull-down. Can we leave these pins when we don't use the port ?

Best Regards,
Taka

0 Rob Rodrigues over 9 years ago in reply to Takahiro Ogo

TI__Mastermind 19780 points

Hi Taka-san,

It will be OK to leave the pins unconnected.

Best Regards,

0 Takahiro Ogo over 9 years ago in reply to Rob Rodrigues

Genius 5940 points

Hi Rob-san,
Thank you so much for your kind support!

Best Regards,
Taka

Interface

Interface forum

[DP83849IF] pin configurations for single port