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Unraveling PCIe 6.0 Loopback And Digital Near-End Loopback Feature


The PCIe specification has given a specific Link Training and Status State Machine (LTSSM) state named Loopback, which is intended for test and fault isolation use. Basically, it gives a mechanism that involves looping back the data that was received in the Loopback LTSSM state. The entry and exit behavior are specified, and all other details are implementation-specific. Loopback can op... » read more