DP83869HM: 1Gbit Copper to Fiber

Martin Leja1

Part Number: DP83869HM

holla,

Can you configure the DP83869HM as a media converter only via a pin strapping?
Application: RJ45/1000BASE-T <- -> 1000 BASE-X/SFP
The information I have read is contradictory.

best regards

Martin

over 1 year ago

0 Alvaro (Al-vuh-roe) Reyes over 1 year ago

TI__Mastermind 19621 points

Hi Martin,

Yes you can, setting the OPMODE strap pins to: 100 sets the 869 into 1000Base-T to 1000Base-X mode. Could you show me what information you read that created doubt? Is there a TI document that is ambiguous or misleading? Please let me know so that I can take note for the next revision of said document.

Regards,

Alvaro

0 Martin Leja1 over 1 year ago in reply to Alvaro (Al-vuh-roe) Reyes

Prodigy 55 points

Hallo Alvaro,

I don't understand the NOTE then

Regards

Martin

+1 Alvaro (Al-vuh-roe) Reyes over 1 year ago in reply to Martin Leja1

TI__Mastermind 19621 points

Hi Martin,

Thank you for pointing this out. Please let me confirm this in lab. I will have an answer for you by Monday at the latest.

Regards,

Alvaro

0 Alvaro (Al-vuh-roe) Reyes over 1 year ago in reply to Alvaro (Al-vuh-roe) Reyes

TI__Mastermind 19621 points

Hi Martin,

Thank you for your patience. I was able to configure the DP83869HMEVM into 1000Base-T to 1000Base-X Media convertor mode using only the straps. I performed a throughput test and saw no packet errors.

Useful Registers:

Reg 0x0001[2] tells us if copper link is up
Reg 0x0C01[2] tells us if fiber link is up

In lab I noticed that the fiber link partner would say link is up, but Reg 0xC01[2] would say link is down. Re-plugging the SFP Module in and out did the trick to get the 869 to link up in fiber.

Regards,

Alvaro

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DP83869HM: 1Gbit Copper to Fiber