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AR# 65375

MPSoC GTR - How to connect GTR pins

Description

How do I connect GTR pins when GTR is used or unused?

Solution

Below is the description for the GTR pins. This will be added to (UG583).

Pins Dir Description
PS_MGTREFCLK0P/PS_MGTREFCLK0N
PS_MGTREFCLK1P/PS_MGTREFCLK1N
PS_MGTREFCLK2P/PS_MGTREFCLK2N
PS_MGTREFCLK3P/PS_MGTREFCLK3N
In(Pad) Differential clock input pin pair for the reference clock of the GTR Quad.
Use DC block capacitors for connection to oscillator.
If unused connect these pins to ground or leave them unconnected.
PS_MGTHRXP0/PS_MGTHRXN0
PS_MGTHRXP1/PS_MGTHRXN1
PS_MGTHRXP2/PS_MGTHRXN2
PS_MGTHRXP3/PS_MGTHRXN3
In(Pad) RXP and RXN are the differential input pairs for each of the receivers in the GTR Quad.
Use DC block capacitors for connection to transmitter.
If unused connect these pins to ground or leave them unconnected.
PS_MGTHTXP0/PS_MGTHTXN0
PS_MGTHTXP1/PS_MGTHTXN1
PS_MGTHTXP2/PS_MGTHTXN2
PS_MGTHTXP3/PS_MGTHTXN3
Out(Pad) TXP and TXN are the differential output pairs for each of the transmitters in the GTR Quad.
If unused leave these pins unconnected.
PS_MGTRREF In(Pad) Calibration resistor input pin for the termination resistor calibration circuit.
Connect to a 500 ohm resistor. The other pin of the resistor should be connected to ground.

See Termination Resistor Calibration Circuit.
Can be left unconnected if the transceivers will not be used.
PS_MGTRAVCC In(Pad) PS_MGTRAVCC is the analog supply for the internal analog circuits of the GTR Quad tile. This includes the analog circuits for the PLLs, transmitters, and receivers.
The nominal voltage is 0.85 VDC.
If all of the GTRs are not used, the power pins can be left unconnected or tied to GND.
PS_MGTRAVTT In(Pad) PS_MGTRAVTT is the analog supply for the Transmitter and Receiver termination circuits of the GTR Quad tile.
The nominal voltage is 1.8 VDC.
If all of the GTRs are not used, the power pins can be left unconnected or tied to GND.
AR# 65375
Date Created 09/09/2015
Last Updated 07/14/2016
Status Active
Type General Article
Devices
  • SoC