The value of CAL_POINTER can be used to determine which stages of calibration
have passed. The first six bits [5:0] represent the calibration stage and the higher
three bits [8:6] represent its status. See the following tables for calibration
stage decoding and calibration stage status decoding.
Table 1. CAL_POINTER Calibration Stage Decoding
| XSDB Reg Name |
XSDB Bit [5:0] |
Calibration Stage |
| CAL_POINTER |
0x00 |
PHY_BISC |
| 0x01 |
MEM_INIT |
| 0x04 |
LRDIMM_DB_MREP |
| 0x05 |
LRDIMM_DB_MRD_CYCLE |
| 0x06 |
LRDIMM_DB_MRD_CENTER |
| 0x07 |
LRDIMM_DB_DWL |
| 0x08 |
LRDIMM_DB_MWD_CYCLE |
| 0x09 |
LRDIMM_DB_MWD_CENTER |
| 0x0A |
DQS_GATE_CAL |
| 0X0B |
READ_DQ_CAL |
| 0X0C |
WRITE_LEVELING |
| 0X0D |
WRITE_DQ_DBI_CAL |
| 0X0E |
WRITE_LATENCY_CAL |
| 0X0F |
READ_DBI_CAL |
| 0X10 |
READ_DQ_VREF_CAL |
| 0X11 |
READ_DQ_DBI_CAL_COMPLEX |
| 0X12 |
WRITE_DQ_VREF_CAL |
| 0X13 |
WRITE_DQ_DBI_CAL_COMPLEX |
| 0X1C |
EN_VT_TRACK |
| 0X1D |
READ_DQS_TRACK |
| 0X1F |
CAL_DONE |
Table 2. CAL_POINTER Calibration Stage Status Decoding
| XSDB Reg Name |
XSDB Bit [8:6] |
Calibration Status Description |
| CAL_POINTER |
0 |
Calibration is enabled and yet to start this stage. |
| 1 |
Calibration to skip. It can be due to any of the following reasons.
- Calibration stage is invalid.
- Calibration stage is valid, but it can be
skipped due to low frequency of operation.
- Calibration stage is valid, but it can be
skipped in functional simulations to cut down simulation
times.
|
| 2 |
Calibration to load. Calibration stage is valid
and values need to be loaded. This is to cut down simulation time in
functional simulations to re-run the simulations quickly. |
| 3 |
Calibration in progress |
| 4 |
Calibration skipped |
| 5 |
Calibration loaded |
| 6 |
Calibration passed |
| 7 |
Calibration failed |