DP83867CR: 100M mode does not work

user761594

Part Number: DP83867CR

Hi，

Encountered a problem, 1000M mode is working normally, but 100M mode is not normal, check the register of 83867 and found no problem, can you give some suggestions?

B&R

Hardy

over 5 years ago

0 Vikram Sharma over 5 years ago

TI__Genius 16030 points

Hi Hardy,

How are you configuring the phy in 100M mode?Is this link partner in 100M or 1000M or in auto-neg mode?

Regards,

Vikram

0 user761594 over 5 years ago in reply to Vikram Sharma

Prodigy 50 points

Hi Vikram,

The phy and the partner is auto-neg mode. And the partner is in 100M. The phy is auto configure 100M after auto_neg.

B&R,

Hardy

0 Vikram Sharma over 5 years ago in reply to user761594

TI__Genius 16030 points

Hi Hardy,

Let me know if you can try out following :

1. Writting 0x001F=8000 or toggling resetn pin once you see the problem. Does phy links up now in 100M?

2. Forcing phy in 100M and try the link-up (to isolate whether the problem is with auto-neg mechanism with partner or 100M mode itself).

Regards,

Vikram

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DP83867CR: 100M mode does not work