Samsung SC32442B54, User Manual

Page: 572 / 647

K5D2G13ACM-D075
Revision 1.0
December 2006
17
MCP 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.
device 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 modifi-
cation 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
512 Byte
(1’st sector)
"H" area
(4’th sector)
Main Field (2,048 Byte)
16 Byte
"G" area
(3’rd sector)
16 Byte
"F" area
(2’nd sector)
16 Byte
"E" area
(1’st sector)
16 Byte
"B" area
512 Byte
(2’nd sector)
"C" area
512 Byte
(3’rd sector)
"D" area
512 Byte
(4’th sector)
Spare Field (64 Byte)
Table 2. Definition of the 528-Byte Sector
Sector
Main Field (Column 0~2,047) Spare Field (Column 2,048~2,111)
Area Name Column Address Area Name Column Address
1’st 528-Byte Sector "A" 0 ~ 511 "E" 2,048 ~ 2,063
2’nd 528-Byte Sector "B" 512 ~ 1,023 "F" 2,064 ~ 2,079
3’rd 528-Byte Sector "C" 1,024 ~ 1,535 "G" 2,080 ~ 2,095
4’th 528-Byte Sector "D" 1,536 ~ 2,047 "H" 2,096 ~ 2,111
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.
From the LSB page to MSB page
DATA IN: Data (1) Data (64)
(1)
(2)
(3)
(32)
(64)
Data register
Page 0
Page 1
Page 2
Page 31
Page 63
Ex.) Random page program (Prohibition)
DATA IN: Data (1)
Data (64)
(2)
(32)
(3)
(1)
(64)
Data register
Page 0
Page 1
Page 2
Page 31
Page 63
Addressing for program operation
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:
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