ADM-PCIE-8K5-FH User Manual
3.6 FireFly
If the 8K5-FH is ordered with the XCKU115 FPGA, two optional FireFly receptacles near the front of the board
allow for additional 16.375G lanes. The FireFly connections have the same capabilities as the SFP+ cages, with
much greater lane width. There are 4 lanes per FireFly, adding up to 8 lanes at 16.375Gps resulting in 131Gbps
total bandwidth. This can be configured in a ring orientation as depicted in the image below, or allow for MPO
style breakouts at the front panel (full-height panel only).The ADM-PCIE-8K5-FH support both copper and optical
FireFly modules. More information on FireFly can be found at https://www.samtec.com/optics/optical-cable/
mid-board/firefly
Both FireFly sites have control signals connected to the FPGA. Their connectivity is detailed in the
Complete
Pinout Table
at the end of this document. The notation used in the pin assignments is FireFly0 and FireFly1 with
locations clarified in the diagram below.
Figure 9 : FireFly Locations
The FireFly sites can fit a number of standard cables. Below is a list of supported part numbers. Contact Alpha
Data or your local Samtec representative for more details.
Description
Part Number
Manufacturer
56G/40G (4x14/10) FireFly Optical Transceiver
ECUO B04 14 017 0 2 1 1 01
Samtec
65.5G (4x16.375) FireFly Copper Cable
ECUE 08 020 T2 FF B4 1 D1
Samtec
Table 11 : FireFly Part Numbers
Page 12
Functional Description
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