k9f1g08r0a Samsung Semiconductor, Inc., k9f1g08r0a Datasheet - Page 32

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k9f1g08r0a

Manufacturer Part Number
k9f1g08r0a
Description
128m X 8 Bit / 256m X 8 Bit Nand Flash Memory
Manufacturer
Samsung Semiconductor, Inc.
Datasheet

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K9F1G08R0A
Figure 12. Page Copy-Back program Operation with Random Data Input
K9F1G08U0A
NOTE : Since programming the last page does not employ caching, the program time has to be that of Page Program. However, if the
previous program cycle with the cache data has not finished, the actual program cycle of the last page is initiated only after comple-
tion of the previous cycle, which can be expressed as the following formula.
Copy-Back Program
The copy-back program is configured to quickly and efficiently rewrite data stored in one page without utilizing an external memory.
Since the time-consuming cycles of serial access and re-loading cycles are removed, the system performance is improved. The ben-
efit is especially obvious when a portion of a block is updated and the rest of the block also need to be copied to the newly assigned
free block. The operation for performing a copy-back program is a sequential execution of page-read without serial access and copy-
ing-program with the address of destination page. A read operation with "35h" command and the address of the source page moves
the whole 2112byte data into the internal data buffer. As soon as the device returns to Ready state, Page-Copy Data-input command
(85h) with the address cycles of destination page followed may be written. The Program Confirm command (10h) is required to actu-
ally begin the programming operation. Data input cycle for modifying a portion or multiple distant portions of the source page is
allowed as shown in Figure 12. "When there is a program-failure at Copy-Back operation, error is reported by pass/fail status.
But if the soure page has an error bit by charge loss, accumulated copy-back operations could also accumulate bit errors.
In this case, verifying the source page for a bit error is recommended before Copy-back program"
Figure 11. Page Copy-Back program Operation
R/B
I/Ox
R/B
I/Ox
NOTE: It’s prohibited to operate Copy-Back program from an odd address page(source page) to an even address page(target page) or from an even
address page(source page) to an odd address page(target page). Therefore, the Copy-Back program is permitted just between odd address pages or
even address pages .
tPROG= Program time for the last page+ Program time for the ( last -1 )th page
00h
00h
Col. Add1,2 & Row Add1,2
Col. Add1,2 & Row Add1,2
Source Address
Add.(4Cycles)
Source Address
Add.(4Cycles)
K9K2G08U1A
- (Program command cycle time + Last page data loading time)
35h
35h
t
t
R
R
85h
85h
Col. Add1,2 & Row Add1,2
Col. Add1,2 & Row Add1,2
Destination Address
Add.(4Cycles)
Destination Address
Add.(4Cycles)
32
Data
There is no limitation for the number of repetition.
10h
85h
t
PROG
Col Add1,2
Add.(2Cycles)
FLASH MEMORY
70h
Data
10h
I/O
Fail
0
t
PROG
70h
Pass

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