DP83822IF: When plugging and unplugging with traffic, the link cannot be established.

ryan

Part Number: DP83822IF

Hi Support Team,

DP83822IF In FX mode, when plugging and unplugging with traffic, the link cannot be established.
Is there a register or method that can solve this problem?

Thanks.

7 months ago

0 Alvaro (Al-vuh-roe) Reyes 7 months ago

TI__Genius 16726 points

Hi Ryan!

I understand your predicament quite well. There is a note in Section 8.4.4.2 100Base-FX Receive of the data sheet describing this issue, as well as an FAQ that I have linked below.

Basically, this is a known issue with the DP83822. The link status won't change in fiber, in order to get the correct link status, a soft-reset must be performed (Set Reg 0x1F = 0x4000) before reading Register 0x1.

https://e2e.ti.com/support/interface-group/interface/f/interface-forum/1272949/faq-dp83822if-fiber-link-status

Regards,

Alvaro

Interface

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DP83822IF: When plugging and unplugging with traffic, the link cannot be established.