It's in the link. https://www.systemverilog.io/design/ddr4-initialization-and-calibration/#why-is-readwrite-training-required https://www.systemverilog.io/desig

It's in the link. https://www.systemverilog.io/design/ddr4-initialization-and-calibration/#why-is-readwrite-training-required https://www.systemverilog.io/design/ddr4-initialization-and-...