The following table defines the GTM transceiver Quad pins.
| Pins | Dir | Description |
|---|---|---|
|
GTM_REFCLK0P GTM_REFCLK0N |
In/Out (Pad) | Configured as either reference clock input pins or RX recovered clock output pins for the Quad. |
|
GTM_REFCLK1P GTM_REFCLK1N |
In/Out (Pad) | Configured as either reference clock input pins or RX recovered clock output pins for the Quad. |
|
GTM_RXP[0/1/2/3]/GTM_RXN[0/1/2/3] |
In (Pad) | RXP and RXN are the differential input pairs for each of the receivers in the transceiver Quad. |
|
GTM_TXP[0/1/2/3]/GTM_TXN[/0/1/2/3] |
Out (Pad) | TXP and TXN are the differential output pairs for each of the transmitters in the transceiver Quad. |
| GTM_AVTTRCAL | In (Pad) | Bias current supply for the termination resistor calibration circuit. See Termination Resistor Calibration Circuit. |
| GTM_RREF | In (Pad) | Calibration resistor input pin for the termination resistor calibration circuit. See Termination Resistor Calibration Circuit. |
| GTM_AVCC | In (Pad) |
GTM_AVCC is the analog supply for the internal analog circuits of the GTM transceiver Quad tile. This includes the analog circuits for the PLLs, transmitters, and receivers. Most packages have multiple groups of power supply connections in the package for GTM_AVCC. Refer to the package pin definitions to identify in which power supply group a specific GTM transceiver Quad is located. For Versal ACAPs, the nominal voltage is 0.88 VDC. |
| GTM_AVTT | In (Pad) |
GTM_AVTT is the analog supply for the transmitter and receiver termination circuits of the GTM transceiver Quad tile. Most packages have multiple groups of power supply connections in the package for GTM_AVTT. Refer to the package pin definitions to identify in which power supply group a specific GTM transceiver Quad is located. For Versal ACAPs, the nominal voltage is 1.2 VDC. |
| GTM_AVCCAUX | In (Pad) |
GTM_AVCCAUX is the auxiliary analog LCPLL voltage supply for the transceivers. Most packages have multiple groups of power supply connections in the package for GTM_AVCCAUX. Refer to the package pin definitions to identify in which power supply group a specific GTM transceiver Quad is located. For Versal ACAPs, the nominal voltage is 1.5 VDC. |
The following figure shows the external power supply connections with the GTM transceivers.
