K9F2G08UXA Datasheet, PDF (18/44 Pages) Samsung semiconductor – FLASH MEMORY

K9F2G08R0A
K9F2G08U0A
FLASH MEMORY
NAND Flash Technical Notes (Continued)
Copy-Back Operation with EDC & Sector Definition for EDC
Generally, copy-back program is very powerful to move data stored in a page without utilizing any external memory. But, if the source
page has one bit error due to charge loss or charge gain, then without EDC, the copy-back program operation could also accumulate
bit errors.
K9F2G08X0A supports copy-back with EDC to prevent cumulative bit errors. To make EDC valid, the page program operation
should be performed on either whole page(2112byte) or sector(528byte). Modifying the data of a sector by Random Data Input
before Copy-Back Program must be performed for the whole sector and is allowed only once per each sector. Any partial
modification smaller than a sector corrupts the on-chip EDC codes.
A 2,112-byte page is composed of 4 sectors of 528-byte and each 528-byte sector is composed of 512-byte main area and 16-byte
spare area.
"A" area
(1’st sector)
512 Byte
Main Field (2,048 Byte)
"B" area
(2’nd sector)
512 Byte
"C" area
(3’rd sector)
512 Byte
Spare Field (64 Byte)
"D" area
(4’th sector)
512 Byte
"E" area "F" area "G" area "H" area
(1’st sector) (2’nd sector) (3’rd sector) (4’th sector)
16 Byte 16 Byte 16 Byte 16 Byte
Table 2. Definition of the 528-Byte Sector
Sector
Main Field (Column 0~2,047)
Area Name
Column Address
1’st 528-Byte Sector
"A"
0 ~ 511
2’nd 528-Byte Sector
"B"
512 ~ 1,023
3’rd 528-Byte Sector
"C"
1,024 ~ 1,535
4’th 528-Byte Sector
"D"
1,536 ~ 2,047
Spare Field (Column 2,048~2,111)
Area Name
Column Address
"E"
2,048 ~ 2,063
"F"
2,064 ~ 2,079
"G"
2,080 ~ 2,095
"H"
2,096 ~ 2,111
Addressing for program operation
Within a block, the pages must be programmed consecutively from the LSB(least significant bit) page of the block to the MSB(most
significant bit) pages of the block. Random page address programming is prohibited. In this case, the definition of LSB page is the
LSB among the pages to be programmed. Therefore, LSB doesn't need to be page 0.
Page 63
(64)
:
Page 31
(32)
:
Page 2
(3)
Page 1
(2)
Page 0
(1)
Data register
From the LSB page to MSB page
DATA IN: Data (1)
Data (64)
Page 63
(64)
:
Page 31
(1)
:
Page 2
(3)
Page 1
(32)
Page 0
(2)
Data register
Ex.) Random page program (Prohibition)
DATA IN: Data (1)
Data (64)
18