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DS160PR410: DS160PR410: How many devices can be supported with 256Byte EEPROM and RX det difference

Oliver Lin
Expert 4465 points
Part Number: DS160PR410

Hi expert,

My customer got 2 questions, would you please kindly help on this?

1. How many devices can be supported with 256Byte EEPROM?

2. About the Rx det pin, what's the difference to 1x/2x/3x valid detection? What's the purpose for this and the suggestion setting?

Thanks,

Oliver

  • 0
    TI__Mastermind 43795 points

    Hi Oliver,

    The number of devices will depend on the style of EEPROM data.  In common channel configuration there are only 4 bytes of data per redriver.  With individual channel control a single device will use 16 bytes of EEPROM data. in most cases with multiple redrivers only two programming configurations will be needed - one for upstream and one for downstream.

    With this constraint it is easily possible to fit 16 devices into a single 256 Byte EEPROM.  The Sigcon Architect tool in demo mode is a good way to verify that your specific configuration of multiple redrivers will fit. 

    The RX_DET pin is a configuration pin to enable or disable the PCIE Receiver Detection protocol.  The RX_DET process will send out a repeating common mode voltage pulse on the redriver output pins.  Once a valid termination is detected on the output, the associated input termination will be set to "active".  The "detection"
     flag can be set for a single detection, two detections in a row, or three detections in a row.  The recommended setting is 1x (RX_DET = Float.

    Regards,

    Lee