16.5.7.1.1.1 NAND Flash PMECC Register
| Name: | NAND Flash PMECC Register |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| key[3:0] | eccOffset[8:6] | ||||||||
| Access | |||||||||
| Reset | |||||||||
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| eccOffset[5:0] | sectorSize[1:0] | ||||||||
| Access | |||||||||
| Reset | |||||||||
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| eccBitReq[2:0] | spareSize[8:4] | ||||||||
| Access | |||||||||
| Reset | |||||||||
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| spareSize[3:0] | nbSectorPerPage[2:0] | usePMECC | |||||||
| Access | |||||||||
| Reset | |||||||||
Bits 31:28 – key[3:0] Value 0xC Must be Written here to Validate the Content of the Whole Word.
Bits 26:18 – eccOffset[8:0] Offset of the First ECC Byte in the Spare Zone
Bits 17:16 – sectorSize[1:0] Size of the ECC Sector
| Value | Description |
|---|---|
| 0 | For 512 bytes |
| 1 | For 1024 bytes per sector |
| Other values | For future use |
Bits 15:13 – eccBitReq[2:0] Number of ECC Bits Required
| Value | Description |
|---|---|
| 0 | 2-bit ECC |
| 1 | 4-bit ECC |
| 2 | 8-bit ECC |
| 3 | 12-bit ECC |
| 4 | 24-bit ECC |
| 5 | 32-bit ECC |
Bits 12:4 – spareSize[8:0] Size of the Spare Zone in Bytes
Bits 3:1 – nbSectorPerPage[2:0] Number of Sectors per Page
| Value | Description |
|---|---|
| 0 | 1 sector per page |
| 1 | 2 sectors per page |
| 2 | 4 sectors per page |
| 3 | 8 sectors per page |
| 4 | 16 sectors per page |
Bit 0 – usePMECC Use PMECC
| Value | Description |
|---|---|
| 0 | Do not use PMECC to detect and correct the data. |
| 1 | Use PMECC to detect and correct the data. |