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DP83822I: Connection

Part Number: DP83822I
Other Parts Discussed in Thread: DP83822HF

Hi, Team,

Could you please give me advice for link -up?  I had troubled to link - up among two DP83822I ( Usually takes 0.2us to connect each other but some of them takes over 3s to connect.)

1. The bootstrap setting enable AutoMDIX but set ForceModes as below.

Does this case enable Auto negotiation? (Or do you have setting sample for Auto negotiation?)

2. there is gap in amplitude of signal waveforms between correct case and failure case as below:
Do you have concerns for the gap in the points of register setting?

3. As monitoring the signal waveform with wide range (10 sec), Customer found the case which amplitude is stabled and not unstable.
Do you have idea why the stable and unstable amplitude  are happened?

Stable waveform

Unstable waveform

Regards,
Nagata.