PHY Implementation - 2020.2 English

Vivado Design Suite User Guide: I/O and Clock Planning (UG899)

Document ID
UG899
Release Date
2021-03-09
Version
2020.2 English

UltraScale architecture Memory IP defines a memory controller using a pre-engineered controller and PHY for interfacing user designs and AMBA specification AXI4 slave interfaces to DDR3, DDR4, QDRII+, QRDRIV, and RLDRAM3 SRAM devices.

The Memory IP is structured so that only the physical layer (PHY) interconnect in the Xilinx® device needs to be updated when pinouts change. Because the PHY implementation depends on the I/O assignments, it must occur after the I/Os are placed and validated. To enable memory I/O planning after synthesis, the implementation of the PHY now happens as a part of implementation during the opt_design command.