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Visitor
Visitor
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Registered: ‎02-14-2013

VCU118 Firefly Daughterboard QSFP28 Control

Trying to use the VCU118 Firefly Daughterboard for a third QSFP28 port.  With the firefly loopback cable, our design works fine.  With a "QSFP28 Loopback QSFP" plugged into the Daughtercard QSFP card our design works fine.  But with a standard Optical QSFP28, we get no output optical power.

  I'd like to bring in the module Present "MOD_PRESn" signal from the QSFP and be able to control the "TRANSMIT Enable", but I can't find any documentation on how to pass these signals to the daughterboard.  Can Xilinx include this schematic on the website or at least pass on the FMC pin assignments for these controls? 

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Moderator
Moderator
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Registered: ‎06-14-2010

Hello @dave_illar ,

Firefly is a Samtec IP. They have some demonstration videos on how to use it with the VCU118 board.

Please go through below link for the same: 
https://www.samtec.com/standards/fpgavcu118

VCU118 schematics can be found here:https://www.xilinx.com/member/forms/download/design-license.html?cid=474685&filename=vcu118-schematic-xtp450.zip

FMC pin assignments - User Guide 1224  should have the info regarding this.

image.png

Hope this helps.

Kind Regards,
Anatoli Curran,
Xilinx Technical Support
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