k9f1208u0c Samsung Semiconductor, Inc., k9f1208u0c Datasheet - Page 33

• Manufacturer Part Number: k9f1208u0c
• Description: Flash Mem Parallel 3.3v 512m-bit 64m X 8 48-pin Tsop-i T/r
• Manufacturer: Samsung Semiconductor, Inc.

K9F1208U0C
K9F1208R0C
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
NOTE :
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
WE
ALE
RE
I/O
0
~
.
I/O 0
I/O 1
I/O 2
I/O 3
I/O 4
I/O 5
I/O 6
I/O 7
7
1. I/Os defined ’Not use’ are recommended to be masked out when Read Status is being executed.
I/O
90h
Page Program
K9F1208B0C
Write Protect
Ready/Busy
Pass/Fail
Not Use
Not Use
Not Use
Not use
Not use
Address. 1cycle
00h
Write Protect
Block Erase
Ready/Busy
Pass/Fail
Not Use
Not Use
Not Use
Not use
Not use
t
WHR
t
AR
t
CEA
t
REA
33
Maker code
Write Protect
Ready/Busy
ECh
Not Use
Not Use
Not Use
Not use
Not use
Not use
Read
K9F1208R0C
K9F1208B0C
K9F1208U0C
Device
Device
Code
Pass : "0"
Don’t -cared
Don’t -cared
Don’t -cared
Don’t -cared
Don’t -cared
Busy : "0"
Protected : "0"
FLASH MEMORY
5Ah
Definition
Device Code
Not Protected : "1"
Ready : "1"
Fail : "1"
36h
76h
76h
3Fh