描述

When the async gearbox is enabled, the PRBS generator cannot be enabled by switching the TXPRBSSEL port.   

解决方案

Assuming a GT is configured to operate in Async Gearbox mode, the following steps must be taken to get the PRBS generator to function.

To return to Async Gearbox mode, undo all of the changes and reset the PCS. 

Some of the changes are to attributes, so DRP is required.