Xilinx 7 Series User Manual page 223

Unused GTP Quad Power Supply Group
If none of the GTP Quads in a power supply group are used in the application, the GTP Quad device
pins can be connected as shown in
Table 5-4: Unused GTP Quad Column Connections
MGTAVCC
MGTAVTT
MGTREFCLKP/MGTREFCLKN
MGTRXP/MGTRXN
MGTTXP/MGTTXN
MGTRREF
Notes:
1. This is the only scenario when the MGTRREF pins can be connected to ground. In all
Partially Unused GTP Quad Power Supply Group
If only a portion of the GTP Quads in a power supply group is used, the pins for unused GTP Quads
must be connected as shown in
connected to the appropriate power supply operating voltage and the MGTRREF pin is connected to
MGTAVTT through a 100Ω resistor.
Table 5-5: Unused GTP Quad Column Connections
MGTAVCC
MGTAVTT
MGTREFCLKP/MGTREFCLKN
MGTRXP/MGTRXN
MGTTXP/MGTTXN
MGTRREF
Partially Used GTP Quad
There are four GTP Transceivers in an Artix-7 FPGA GTP Quad. For a partially used GTP Quad
where one or more but not all of the transceivers are not used, the analog power supplies,
MGTAVCC and MGTAVTT, need to be connected.
the GTP transceivers that are not used.
Table 5-6: Unused GTP Quad Column Connections
MGTAVCC
MGTAVTT
7 Series FPGAs GTP Transceivers User Guide
UG482 (v1.9) December 19, 2016
Pin or Pin Pair of the Unused GTP Quad
(1)
other scenarios, these pins must be connected for normal operation.
Pin or Pin Pair of the Unused GTP Quad
Pin or Pin Pair of the Unused GTP Quad
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Pin Description and Design Guidelines
Table 5-4.
Table 5-5. Notice for this case, the power supply pins must be
MGTAVTT through a 100Ω resistor
Table 5-6
Connection
GND
GND
Float
GND
Float
GND
Connection
AVCC
AVTT
Float
GND
Float
shows the connections to the Quad for
Connection
AVCC
AVTT
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