DP83869HM: Non-Op when attempting copper to fiber media converter mode

Part Number: DP83869HM

Tool/software:

Hello TI team! In short, we have attempted to operate the DP83869HM in simple copper to fiber (SFP module) media converter mode. I have included the hardware strap configuration below.

Description of behavior:

We are able to see ethernet link active on the attached copper device (link lights) however no network communication works (except local IP ping)

When connecting power: LED 1 shows solid (with some very brief flickers) for several several seconds, LED 2 lights up for about a second, then all lights turn off. LED 2 then intermittently illuminates. LED 0 is never lit. 

If the fiber link neighbor is disconnected during power on, LED 1 does not ever illuminate (expected behavior). 

All LEDs are pulled down such as in the following schematic: 

Other straps:

Any insight is appreciated! Happy to privately share the full schematic if it would be helpful!

  • Hi,

    Can you please verify that you are strapping to either 1000Base-T to 1000Base-X or 100Base-TX to 100Base-FX as shown below?

    Also, in 1000Base-X and 100Base-FX mode, the JTAG_TDI/SD pin acts as Signal Detect. SD is an active low pin. Is it connected to Signal Detect of optical transceiver?

    Thanks

    David