K5D5657ACM Datasheet, PDF (16/74 Pages) Samsung semiconductor – 256Mb NAND and 256Mb Mobile SDRAM

K5D5657ACM-F015
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MCP MEMORY
Pointer Operation
Samsung NAND Flash has three address pointer commands as a substitute for the two most significant column addresses. ’00h’
command sets the pointer to ’A’ area(0~255byte), ’01h’ command sets the pointer to ’B’ area(256~511byte), and ’50h’ command sets
the pointer to ’C’ area(512~527byte). With these commands, the starting column address can be set to any of a whole
page(0~527byte). ’00h’ or ’50h’ is sustained until another address pointer command is inputted. ’01h’ command, however, is effective
only for one operation. After any operation of Read, Program, Erase, Reset, Power_Up is executed once with ’01h’ command, the
address pointer returns to ’A’ area by itself. To program data starting from ’A’ or ’C’ area, ’00h’ or ’50h’ command must be inputted
before ’80h’ command is written. A complete read operation prior to ’80h’ command is not necessary. To program data starting from
’B’ area, ’01h’ command must be inputted right before ’80h’ command is written.
Table 2. Destination of the pointer
Command
00h
01h
50h
Pointer position
0 ~ 255 byte
256 ~ 511 byte
512 ~ 527 byte
Area
1st half array(A)
2nd half array(B)
spare array(C)
"A" area
(00h plane)
"B" area
"C" area
(01h plane) (50h plane)
256 Byte
256 Byte
16 Byte
"A"
"B"
"C"
Internal
Page Register
Pointer select
commnad
(00h, 01h, 50h)
Pointer
Figure 3. Block Diagram of Pointer Operation
(1) Command input sequence for programming ’A’ area
The address pointer is set to ’A’ area(0~255), and sustained
Address / Data input
00h
80h
10h
00h
Address / Data input
80h
10h
’A’,’B’,’C’ area can be programmed.
It depends on how many data are inputted.
’00h’ command can be omitted.
(2) Command input sequence for programming ’B’ area
The address pointer is set to ’B’ area(256~512), and will be reset to
’A’ area after every program operation is executed.
Address / Data input
Address / Data input
01h
80h
10h
01h
80h
10h
’B’, ’C’ area can be programmed.
It depends on how many data are inputted.
’01h’ command must be rewritten before
every program operation
(3) Command input sequence for programming ’C’ area
The address pointer is set to ’C’ area(512~527), and sustained
Address / Data input
Address / Data input
50h
80h
10h
50h
80h
10h
Only ’C’ area can be programmed.
’50h’ command can be omitted.
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Revision 0.1
September 2003