GTH/GTY Transmitter Clocking - 2.1 English

UHD-SDI GT LogiCORE IP Product Guide (PG380)

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2.1 English

The GTH/GTY transmitter clocking is handled by the Transmitter User Clocking Network Helper block when enabled during GT IP generation from the UltraScaleā„¢ FPGAs Transceiver Wizard. The txusrclk and txusrclk2 output is driven by a BUFG_GT within the helper block and its frequency is exactly equal to the word rate of the data that must enter the txdata port of the GTH/GTY transmitter. The txusrclk and txusrclk2 are generated in the GTH/GTY transmitter by dividing the serial clock from the PLL down to the word rate. See the UltraScale FPGAs Transceivers Wizard LogiCORE IP Product Guide (PG182) for more details on Transmitter User Clocking Network Helper block.