This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DP83849IF: DP83849IF 56PIN extender_EN function

Part Number: DP83849IF
Other Parts Discussed in Thread: DP83849ID,

Hi team,

My customer was using DP83849ID. Now they want to change DP83849ID to DP83849IF and keep the function unchanged. But we noticed that the Pin56 is different between ID and IF. 

When customer used ID version, it is configured to RMII mode and P56 is floating. But in IF version, we noticed that Pin56 has a another extender_EN function. So my question is:

1. If Customer wants to keep the all the PHY configuration unchanged, can they directly replace ID version with IF version without changing any hardware or software? Will Pin56 floating in IF version make some difference compared to the previous ID version configuration?

2. Is there any other difference between ID version and IF version?

Thanks.

Best regards,

Wayne

  • Hi Wayne,

    The RXD2_B pin has an internal pull-down. If you replace with the ID version to the IF version you will still have the same function since the pull-down does not change.

    If you want the same functionality to remain you can do so without hardware modification.