37.18.1 MLC/SLC Write Page Operation Using PMECC
When an MLC write page operation is performed, the PMECC controller is configured with the NANDWR bit of the PMECC Configuration (HSMC_PMECCFG) register set to one. When the NAND spare area contains file system information and redundancy (PMECCx), the spare area is error-protected, then the HSMC_PMECCFG.SPAREEN bit is set. When the NAND spare area contains only redundancy information, the SPAREEN bit is cleared.
When the write page operation is terminated, the user writes the redundancy in the NAND spare area. This operation can be done with DMA assistance.
| BCH_ERR Field | Sector Size Set to 512 Bytes | Sector Size Set to 1024 Bytes |
|---|---|---|
| 0 | PMECC0 | PMECC0 |
| 1 | PMECC0, PMECC1 | PMECC0, PMECC1 |
| 2 | PMECC0, PMECC1, PMECC2, PMECC3 | PMECC0, PMECC1, PMECC2, PMECC3 |
| 3 | PMECC0, PMECC1, PMECC2, PMECC3, PMECC4, PMECC5, PMECC6 | PMECC0, PMECC1, PMECC2, PMECC3, PMECC4, PMECC5, PMECC6 |
| 4 | PMECC0, PMECC1, PMECC2, PMECC3, PMECC4, PMECC5, PMECC6, PMECC7, PMECC8, PMECC9 | PMECC0, PMECC1, PMECC2, PMECC3, PMECC4, PMECC5, PMECC6, PMECC7, PMECC8, PMECC9, PMECC10 |
| 5 | PMECC0, PMECC1, PMECC2, PMECC3, PMECC4, PMECC5, PMECC6, PMECC7, PMECC8, PMECC9, PMECC10, PMECC11, PMECC12 | PMECC0, PMECC1, PMECC2, PMECC3, PMECC4, PMECC5, PMECC6, PMECC7, PMECC8, PMECC9, PMECC10, PMECC11, PMECC12, PMECC13 |
| BCH_ERR Field | Sector Size Set to 512 Bytes | Sector Size Set to 1024 Bytes |
|---|---|---|
| 0 | 4 bytes | 4 bytes |
| 1 | 7 bytes | 7 bytes |
| 2 | 13 bytes | 14 bytes |
| 3 | 20 bytes | 21 bytes |
| 4 | 39 bytes | 42 bytes |
| 5 | 52 bytes | 56 bytes |