SPRUIU1C July 2020 – February 2024 DRA821U , DRA821U-Q1
The PCIe subsystem incorporates a 4-lane PCIe compliant PHY (PIPE) interface to connect to a SERDES-based PHY. The PCIe PHY module consist of a SERDES module and a PCIe PCS (Physical Coding Sub-block) module. The SERDES module converts parallel data into PCIe serial signals and the PCIе PCS module provides an industry standard PIPE Interface to PCIe MAC. The frequency of the PIPE interface can be 62.5MHz, 125MHz or 250MHz depending on whether the system is operating in Gen1, Gen2 or Gen3 mode. The width of the PIPE interface remains constant at 32-bits for all modes of operation. The PCIe controller Lane 0 will always be the master lane for any lane width. For more information on the SERDES module, see Serializer/Deserializer (SerDes).