Samsung S5PC100, User Manual

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NAND FLASH CONTROLLER S5PC100 USER’S MANUAL (REV1.0)
5.4-6
5 1-BIT/ 4-BIT/ 8-BIT ECC (ERROR CORRECTION CODE)
NAND Flash controller has four Error Correction Code (ECC) modules for 1-bit ECC, one ECC module for 4-bit
ECC and one for 8-bit ECC.
For 1-bit ECC, NAND Flash controller has 4 ECC modules. Some 1-bit ECC modules are used to generate (up to)
2048 bytes ECC parity code and the others are used to generate (up to) 4 bytes ECC Parity code.
NAND Flash controller has one ECC module for 4-bit ECC and one ECC module for 8-bit ECC. They are used to
generate 512 or 24 bytes ECC parity code. 4-bit/ 8-bit ECC module generates parity code for each 512 byte.
However, 1-bit ECC modules generate parity code per byte lane separately.
Following are the ECC parity code and two tables are 1-bit ECC.
•
28-bit ECC Parity Code = 22-bit Line 6bit Column Parity
•
10-bit ECC Parity Code = 4-bit Line 6bit Column Parity
5.1 2048 BYTE 1-BIT ECC PARITY CODE ASSIGNMENT TABLE
DATA7 DATA6 DATA5 DATA4 DATA3 DATA2 DATA1 DATA0
MECCn_0 ~P64 ~P64’ ~P32 ~P32’ ~P16 ~P16’ ~P8 ~P8’
MECCn_1 ~P1024 ~P1024’ ~P512 ~P512’ ~P256 ~P256’ ~P128 ~P128’
MECCn_2 ~P4 ~P4’ ~P2 ~P2’ ~P1 ~P1’ ~P2048 ~P2048’
MECCn_3 1 1 1 1 ~P8192 ~P8192’ ~P4096 ~P4096’
5.2 4 BYTE 1-BIT ECC PARITY CODE ASSIGNMENT TABLE
DATA7 DATA6 DATA5 DATA4 DATA3 DATA2 DATA1 DATA0
SECCn_0 ~P2 ~P2’ ~P1 ~P1’ ~P16 ~P16’ ~P8 ~P8’
SECCn_1 1 1 1 1 1 1 ~P4 ~P4’