K9F1208X0C Datasheet, PDF (33/38 Pages) Samsung semiconductor – 64M x 8 Bits NAND Flash Memory

K9F1208U0C
K9F1208R0C K9F1208B0C
FLASH MEMORY
READ STATUS
The device contains a Status Register which may be read to find out whether program or erase operation is completed, and whether
the program or erase operation is completed successfully. After writing 70h command to the command register, a read cycle outputs
the content of the Status Register to the I/O pins on the falling edge of CE or RE, whichever occurs last. This two line control allows
the system to poll the progress of each device in multiple memory connections even when R/B pins are common-wired. RE or CE
does not need to be toggled for updated status. Refer to table 4 for specific Status Register definitions. The command register
remains in Status Read mode until further commands are issued to it. Therefore, if the status register is read during a random read
cycle, a read command(00h or 50h) should be given before sequential page read cycle.
Table 4. Status Register Definition for 70h Command
I/O
I/O 0
I/O 1
I/O 2
I/O 3
I/O 4
I/O 5
I/O 6
I/O 7
Page Program
Pass/Fail
Not use
Not use
Not Use
Not Use
Not Use
Ready/Busy
Write Protect
Block Erase
Pass/Fail
Not use
Not use
Not Use
Not Use
Not Use
Ready/Busy
Write Protect
Read
Not use
Not use
Not use
Not Use
Not Use
Not Use
Ready/Busy
Write Protect
Definition
Pass : "0"
Fail : "1"
Don’t -cared
Don’t -cared
Don’t -cared
Don’t -cared
Don’t -cared
Busy : "0"
Ready : "1"
Protected : "0"
Not Protected : "1"
NOTE : 1. I/Os defined ’Not use’ are recommended to be masked out when Read Status is being executed.
.
Read ID
The device contains a product identification mode, initiated by writing 90h to the command register, followed by an address input of
00h. Five read cycles sequentially output the manufacturer code(ECh), and the device code and 3rd, 4th cycle ID respectively. The
command register remains in Read ID mode until further commands are issued to it. Figure 15 shows the operation sequence.
Figure 15. Read ID Operation
CLE
CE
tCEA
WE
tAR
ALE
RE
I/O0~7
tWHR
90h
00h
Address. 1cycle
tREA
ECh
Maker code
Device
Code
Device
K9F1208R0C
K9F1208B0C
K9F1208U0C
5Ah
3Fh
Device Code
36h
76h
76h
33