Datasheet

356
SAM9X25 [DATASHEET]
11054E–ATARM–10-Mar-2014
27.6.1 PMECC Configuration Register
Name: PMECC_CFG
Address: 0xFFFFE000
Access: Read-write
Reset: 0x00000000
• BCH_ERR: Error Correct Capability
• SECTORSZ: Sector Size
0: The ECC computation is based on a sector of 512 bytes.
1: The ECC computation is based on a sector of 1024 bytes.
• PAGESIZE: Number of Sectors in the Page
• NANDWR: NAND Write Access
:0: NAND read access
1: NAND write access
• SPAREEN: Spare Enable
– for NAND write access:
0: The spare area is skipped
1: The spare area is protected with the last sector of data.
– for NAND read access:
0: The spare area is skipped.
1: The spare area contains protected data or only redundancy information.
31 30 29 28 27 26 25 24
––––––––
23 22 21 20 19 18 17 16
– – – AUTO – – – SPAREEN
15 14 13 12 11 10 9 8
NANDWR – – PAGESIZE
76543210
– – – SECTORSZ – BCH_ERR
Value Name Description
0 BCH_ERR2 2 errors
1 BCH_ERR4 4 errors
2 BCH_ERR8 8 errors
3 BCH_ERR12 12 errors
4 BCH_ERR24 24 errors
Value Name Description
0 PAGESIZE_1SEC 1 sector for main area (512 or 1024 bytes)
1 PAGESIZE_2SEC 2 sectors for main area (1024 or 2048 bytes)
2 PAGESIZE_4SEC 4 sectors for main area (2048 or 4096 bytes)
3 PAGESIZE_8SEC 8 errors for main area (4096 or 8192 bytes)