k9f2g08uxa Samsung Semiconductor, Inc., k9f2g08uxa Datasheet - Page 18

• Manufacturer Part Number: k9f2g08uxa
• Description: 256m X 8 Bit Nand Flash Memory
• Manufacturer: Samsung Semiconductor, Inc.

K9F2G08R0A
K9F2G08U0A
NAND Flash Technical Notes
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.
spare area.
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.
Table 2. Definition of the 528-Byte Sector
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
2’nd 528-Byte Sector
3’rd 528-Byte Sector
1’st 528-Byte Sector
4’th 528-Byte Sector
(1’st sector)
"A" area
512 Byte
Sector
Page 63
Page 31
Page 2
Page 1
Page 0
From the LSB page to MSB page
DATA IN: Data (1)
(2’nd sector)
512 Byte
"B" area
Area Name
Data register
Main Field (2,048 Byte)
"A"
"B"
"C"
"D"
Main Field (Column 0~2,047)
(64)
(32)
(3)
(2)
(1)
:
:
(Continued)
Data (64)
(3’rd sector)
"C" area
512 Byte
Column Address
1,024 ~ 1,535
1,536 ~ 2,047
512 ~ 1,023
0 ~ 511
18
(4’th sector)
"D" area
512 Byte
Page 63
Page 31
Page 2
Page 1
Page 0
Ex.) Random page program (Prohibition)
DATA IN: Data (1)
Area Name
(1’st sector)
Spare Field (Column 2,048~2,111)
"G"
"E"
"F"
"H"
"E" area
16 Byte
Data register
FLASH MEMORY
Spare Field (64 Byte)
(2’nd sector)
(64)
(32)
(1)
(3)
(2)
"F" area
16 Byte
:
:
Column Address
Data (64)
2,048 ~ 2,063
2,064 ~ 2,079
2,080 ~ 2,095
2,096 ~ 2,111
(3’rd sector)
"G" area
16 Byte
(4’th sector)
"H" area
16 Byte