External Memory Interface Handbook Volume 3: Reference Material: For UniPHY-based Device Families

ID 683841
Date 3/06/2023
Document Table of Contents AFI Calibration Status Timing Diagram

The controller interacts with the PHY during calibration at power-up and at recalibration.

At power-up, the PHY holds afi_cal_success and afi_cal_fail 0 until calibration is done, when it asserts afi_cal_success, indicating to controller that the PHY is ready to use and afi_wlat and afi_rlat signals have valid values.

At recalibration, the controller asserts afi_cal_req, which triggers the same sequence as at power-up, and forces recalibration of the PHY.

Figure 134. Calibration