GTM_REFCLK0P GTM_REFCLK0N
GTM_REFCLK1P
GTM_REFCLK1N
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When configured as an input:
- Use AC coupling capacitors for connection to
oscillator.
- For AC coupling capacitors, see Reference Clock Interface.
- Reference clock oscillator output must
comply with the minimum and maximum input amplitude
requirements for these input pins. See the Versal ACAP data sheets.
When configured as an output:
- Use AC coupling capacitors for connection to
receiving device.
- For AC coupling capacitors use 0.01 μF.
- For output signal characteristics, see the
Versal ACAP data
sheets.
- If reference pins are not used, leave the
associated pin pair unconnected. However, if the IBUFDS_GTE5
is instantiated in the design but not used, the associated
pin pair should be connected to GND.
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GTM_RXP[0/1/2/3] GTM_RXN[0/1/2/3]
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- Use AC coupling capacitors for connection to
transmitter. The recommended value for AC coupling capacitor
is 100 nF.
- Receiver data traces should be provided
enough clearance to eliminate crosstalk from adjacent
signals.
- If a receiver will never be used under any
conditions, connect the associated pin pair to GND.
- If a receiver is not used and not connected
to anything under some conditions, but might be connected to
something and used under other conditions, then for the
conditions when the receiver is unused, either do not
instance the GTM transceiver in the Versal ACAP design, or if
the GTM transceiver is instanced, set RXPD[1:0] to
2'b11 .
- See RX Analog Front End for
more details.
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GTM_TXP[0/1/2/3] GTM_TXN[0/1/2/3]
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- The transmitter should be AC coupled to the
receiver. The recommended value for the AC coupling
capacitor is 100 nF.
- Transmitter data traces should be provided
enough clearance to eliminate crosstalk from adjacent
signals.
- If a transmitter is not used, leave the
associated pin pair unconnected.
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GTM_AVTTRCAL |
- Connect to GTM_AVTT and to a 100Ω resistor
that is also connected to GTM_RREF. Use identical trace
geometry for the connection between the resistor and this
pin and for the connection from the other pin of the
resistor to GTM_RREF. Also, the DC resistance of the PCB
trace should be limited to less than 0.5Ω.
- See Termination Resistor Calibration Circuit.
- If an entire PSG is not used by any Quads,
tie GTM_AVTTRCAL to ground.
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GTM_RREF |
- Connect a 100Ω resistor that is also
connected to GTM_AVTTRCAL. Use identical trace geometry for
the connection between the resistor and this pin and for the
connection from the other pin of the resistor to
GTM_AVTTRCAL. Also, the DC resistance of the PCB trace
should be limited to less than 0.5Ω.
- See Termination Resistor Calibration Circuit.
- If an entire PSG is not used by any Quads,
tie MGTRREF to ground.
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GTM_AVCC |
- The nominal voltage is 0.88 VDC.
- See the Versal ACAP data
sheets for power supply voltage tolerances.
- The power supply regulator for this voltage
should not be shared with non-transceiver loads.
- Many packages have multiple groups of power
supply connections in the package for GTM_AVCC. Information
on pin locations for each package can be found in
Versal
ACAP Packaging and Pinouts Architecture Manual (AM013).
- For optimal performance, power supply noise
must be less than 10 mVpp over the frequency range 10 kHz TO
80 MHz.
- If all of the Quads in a power supply group
are not used, the associated power pins can be left
unconnected or tied to GND.
- For power consumption, power supply
sequencing and filter capacitor recommendations, refer to
the Xilinx Power Estimator (XPE) at www.xilinx.com/power.
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GTM_AVTT |
- The nominal voltage is 1.2 VDC.
- See the Versal ACAP data
sheets for power supply voltage tolerances.
- The power supply regulator for this voltage
should not be shared with non-transceiver loads.
- Many packages have multiple groups of power
supply connections in the package for GTM_AVTT. Information
on pin locations for each package can be found in
Versal
ACAP Packaging and Pinouts Architecture Manual (AM013).
- For optimal performance, power supply noise
must be less than 10 mVpp over the frequency range 10 kHz TO
80 MHz.
- If all of the Quads in a power supply group
are not used, the associated power pins can be left
unconnected or tied to GND.
- For power consumption, power supply
sequencing and filter capacitor recommendations, refer to
XPE at www.xilinx.com/power.
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GTM_AVCCAUX |
- The nominal voltage is 1.5 VDC.
- See the Versal ACAP data
sheets for power supply voltage tolerances.
- The power supply regulator for this voltage
should not be shared with non-transceiver loads.
- Many packages have multiple groups of power
supply connections in the package for GTM_AVCCAUX.
Information on pin locations for each package can be found
in
Versal
ACAP Packaging and Pinouts Architecture Manual (AM013).
- For optimal performance, power supply noise
must be less than 10 mVpp over the frequency range 10 KHz TO
80 MHz.
- If all of the Quads in a power supply group
are not used, the associated power pins can be left
unconnected or tied to GND.
- For power consumption, power supply
sequencing and filter capacitor recommendations, refer to
XPE at www.xilinx.com/power.
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