SPRUIM2H May 2020 – October 2023 AM2431 , AM2432 , AM2434 , AM6411 , AM6412 , AM6421 , AM6422 , AM6441 , AM6442
The loopback path when PCIe subsystem is loopback target is:
Remote device -> PCIe Link -> PIPE (RX) -> Loopback -> PIPE (TX) -> PCIe Link -> Remote device
If the PCIe subsystem is a loopback target, then the incoming serial data is routed back to the originating device from the PIPE interface as per PCIe loopback requirements. Typically, PCIe test equipment will be used as loopback initiator and it will transition PCIe subsystem into loopback target state following which, the inbound transactions will be looped back to the test equipment.