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DP83869HM: DP83869HM Strap Configuration to disable Signal Detect in Media Converter Mode

Part Number: DP83869HM

Hi team,

We are using DP83869HM to implement fiber communication. As per datasheet JTAG_TDI/SD (Pin 24) can be disabled in 1000M-FX. What is the configuration to disable this in 100Mbps Media converter mode.

Manoj 

  • Hello Manoj,

    In Table 15 of the datasheet, if you strap pin 16 (LED_1) to GND, it will disable signal detect during 100Mbps operation as well.

    Sincerely,

    Gerome

  • Hi Gerome,

    If I strap pin46 (LED_1) to GND through 2.49K , interface doesn't work. No packets are received.

    But , if I connect LOS signal from SFP transceiver to JTAG_TDI/SD (Pin24) , communication is successful. 

    I'm working in 100Mbps Multi Media Converter mode for which recommended straps are as in image : 

    But nothing is mentioned regarding JTAG_TDI/SD pin.

    An any help is appreciated.

  • Hello Manoj,

    My mistake, that strap pin I mentioned was for a different operation mode and will not be viable for media converter mode. Instead, leave that pin alone, and do connect the LOS signal to pin 24. Why would you like to disable signal detect in media converter mode?

    Sincerely,

    Gerome