RX Polarity Control

Versal ACAP GTM Transceivers Architecture Manual (AM017)

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1.0 English

If the RXP and RXN differential traces are accidentally swapped on the PCB, the differential data received by the GTM RX can be reversed. The GTM RX allows inversion to be done on parallel bytes in the PCS after the SIPO to offset reversed polarity on the differential pair. The polarity control function uses the CH*_RXPOLARITY input, which is driven High from the interconnect logic interface to invert polarity.