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DAC39RF12EVM: HTG-VSL300 Carrier compatibility

Part Number: DAC39RF12EVM

Tool/software:

I would like to use the HTG-VSL300 Carrier Card to control a DAC39RF12EVM.  The default configuration of the DAC card uses DP0_C2M through DP13_C2M, and DP20_C2M to DP21_C2M.  While this works fine for the TSW14J59 carrier card, the HTG-VSL300 carrier card only has connections for DP0 through DP15.  Looking at the current published schematic for the DAC card (Schematic Rev C, dated 2025-03-24), there appears to be a set of zero-ohm resisters that can be moved to move the 2 physical lanes (8SRX_n/p and 10SRX_n/p) from DP21 and DP20, to DP14 and DP15.  However, instead of being connected to the C2M pins, as are all of the other signals, they appear to be connected to M2C pins (which cannot be driven by the carrier card).  Is there something that I am missing that will make this alternate configuration work?

  • Hey David, 

    There appears to be a mistake on the EVM. Those pins were supposed to be routed to C2M and not M2C. The good news is you can use any JMODE that uses 12 lanes or less with that card with no issue. Did you know how much IBW you needed for your application?

    Regards, 

    Matt