Firefly; Figure 9 Firefly Locations; Figure 10 Firefly Breakout To Front Panel - Alpha Data ADM-PCIE-8V3 User Manual

ADM-PCIE-8V3 User Manual

3.6 FireFly

Two FireFly receptacles along the top of the board allow for additional 100G breakouts (with MPO) to the front
panel or for internal chassis ring connections. The FireFly connections have the same capabilities as the
QSFP28 cages. The ADM-PCIE-8V3 only supports 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
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.
Use the FIREFLY*_SEL_1V8_L in conjunction with the OPTICAL_SCL_1V8 and OPTICAL_SDA_1V8 pins as
detailed in Complete Pinout Table
The FireFly modules are broken out to the front panel as shown in the image below. The Samtec FireFly optical
module ties the PCB to the front panel where an industry standard MPO coupler is used for attachment to
external cabling.
The order options for the ADM-PCIE-8V3 include an option to fit the FireFly optical transceivers. The table below
shows the part number for the transceivers fitted with each option.
Functional Description
ad-ug-1308_v1_9.pdf
to communicate with QSFP28 register space.
Figure 9 : FireFly Locations
Figure 10 : FireFly Breakout to Front Panel
Complete
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