DP83869EVM: DP83869EVM. Media Convertor Mode(HW, no use mcu)

I was operating the DP83869EVM in a test setup, and when I changed the slot connector from fiber to copper, it didn't connect. However, after powering it off and on again, it started operating normally.

So, it seems that changing the connector while it's operating prevents a proper connection, right?

Hi, 

DONGMIN LIM said:

when I changed the slot connector from fiber to copper

What do you mean by this?

If the link is lost and regained on either copper or fiber connector, you can enable link loss pass through feature via strapping to inform the connector on the other side that the connection is lost. If not, the far end will not be able to get the information that the link was lost. 



Best,
J

Hot-swapping the SFP in the DP83869EVM from copper to fiber while powered on causes the connection to drop. Power cycling the DP83869EVM restores the connection. Is this normal behavior?

Hi Dongmin, 

If the link loss pass through is not enabled, the connection may not be re-established because the far end will not detect the link was dropped in the first place. Hence, the far end will not try to re-establish the link without forcing it. Does this behavior happen after link loss pass through is enabled?

Best,
J

First, the EVM board has link loss pass through enabled by default. I'm not sure about the other media converter. I will check that.

Additionally, we use the DP83867ISRGZR in our mass-produced chips. This component also supports SGMII. Does this mean this component also supports Media Converter mode?

If you connect the SGMII lines of the DP83867 to the SFP slot lines in the same way as the DP83869, wouldn't it also support FIBER & COPPER operation? In that case, it doesn't seem to be much different from the Media Converter mode.