| [31:15] | Reserved | 0 | |
| 14 | CALIB_LOCK | 0 | Used in the DDRIO calibration block as an override to lock the codes during intermediate runs. When the firmware receives CALIB_INTRPT, it may choose to assert this signal by prior knowledge of the traffic without going through the process of putting the DDR into self refresh. This bit is only read/write. |
| 13 | CALIB_START | 0 | Used in the DDRIO calibration block and indicates that rerun of the calibration state machine is required. |
| 12 | CALIB_TRIM | | Used in the DDRIO calibration block and indicates the override of the calibration value from the PC code/programmed code values. |
| [11:6] | NCODE | 0 | Used in the DDRIO calibration block and indicates DPC override NCODE from flash. This can also be overwritten from the firmware. |
| [5:0] | PCODE | 0 | Used in the DDRIO calibration block and indicates PC override PODE from flash. This can also be overwritten from the firmware. |
