Quick Insights into PCI Gen 6 Physical Layer Logical Sub – Blocks V 0.9
Overview
The Physical Layer is present at the bottom of the PCIe hierarchy, which includes all logic functions and circuitry for data transfer operations through the physical interface.
Information, in the form of TLP and DLLP bytes received from the Functional layer and Data Link Layer, needs to be transmitted and received across the PCIe Express link in an appropriate serialized format at a compatible frequency supported by the devices connected to each other across a link.
PCIe Gen6 Physical layer can transceive data at the maximum rate of 64 GT/s per lane, which is equipped with the backward compatibility of
- 32 GT/s,
- 16GT/s,
- 8GT/s,
- 5GT/s
- 2.5GT/s.
This layer is responsible for the generation of Ordered Sets on the transmit side which will further be used for Link Initialization and Training, Clock Tolerance compensation and indication for entry into and exit from low power state on the link.
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