LRDIMM MRD Center Training - 1.0 English

Versal ACAP Programmable Network on Chip and Integrated Memory Controller LogiCORE IP Product Guide (PG313)

Document ID
PG313
Release Date
2022-12-14
Version
1.0 English
This training aligns Read MDQS in the center of the Read MDQ window at the data buffer. In this training mode, the controller pre-programs the data buffer MPR registers with the expected pattern and issues the commands. The data buffer compares the read data with the expected data and feeds back the result on the DQ bus. Calibration finds the left and right edges of the Read MDQ valid window and centers Read MDQS in it.
Table 1. MRD Center Training Register
Register Name Quantity Description
Fx_DB_MRD_CENTER Rank Data Buffer MRD taps [4:0]