SDI II Intel® FPGA IP User Guide

ID 683133
Date 2/16/2022
Public

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7.1.2.4. Ensuring Independent RX and TX Operations in the Same Channel

The rx_cal_busy and tx_cal_busy signals from the transceiver are from the same internal node and change state concurrently during calibration. Because these signals are from the same internal node, the RX and TX transceivers in the same channel are affected by each other when one transceiver is in calibration. Problems may occur when the RX and TX transceivers in the same channel are required to work independently, because the TX is held in reset when the RX recalibrates or vice versa.

A possible workaround for this problem is to use the transceiver arbiter from the generated design example. For more details about the arbiter's signal interface, refer to the respective design example user guides.

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