k9k1208u0a Samsung Semiconductor, Inc., k9k1208u0a Datasheet - Page 12

• Manufacturer Part Number: k9k1208u0a
• Description: 64m X 8 Bit Nand Flash Memory
• Manufacturer: Samsung Semiconductor, Inc.

Pointer Operation of K9K1208U0A
K9K1208U0A-YCB0, K9K1208U0A-YIB0
Table 1. Destination of the pointer
(1) Command input sequence for programming ’A’ area
(2) Command input sequence for programming ’B’ area
(3) Command input sequence for programming ’C’ area
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 effec-
tive 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 input-
ted 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.
Command
00h
01h
50h
’A’,’B’,’C’ area can be programmed.
It depends on how many data are inputted.
00h
01h
50h
’B’, ’C’ area can be programmed.
It depends on how many data are inputted.
Only ’C’ area can be programmed.
Pointer position
The address pointer is set to ’A’ area(0~255), and sustained
The address pointer is set to ’B’ area(256~512), and will be reset to
’A’ area after every program operation is executed.
The address pointer is set to ’C’ area(512~527), and sustained
256 ~ 511 byte
512 ~ 527 byte
0 ~ 255 byte
80h
80h
80h
Address / Data input
Address / Data input
Address / Data input
2nd half array(B)
1st half array(A)
spare array(C)
Area
10h
10h
10h
12
’00h’ command can be omitted.
00h
01h
50h
’01h’ command must be rewritten before
every program operation
’50h’ command can be omitted.
Figure 2. Block Diagram of Pointer Operation
Pointer select
commnad
(00h, 01h, 50h)
(00h plane)
"A" area
256 Byte
"A"
80h
80h
80h
Address / Data input
Address / Data input
Address / Data input
FLASH MEMORY
(01h plane)
256 Byte
"B" area
Pointer
"B"
10h
10h
10h
(50h plane)
16 Byte
"C" area
"C"
Page Register
Internal