kfm2g16q2m-deb8 Samsung Semiconductor, Inc., kfm2g16q2m-deb8 Datasheet - Page 116
kfm2g16q2m-deb8
Manufacturer Part Number
kfm2g16q2m-deb8
Description
2gb Muxonenand M-die
Manufacturer
Samsung Semiconductor, Inc.
Datasheet
1.KFM2G16Q2M-DEB8.pdf
(177 pages)
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Note 1) Selected DataRAM by BSA & BSC is used for Copy back operation, so previous data is overwritten.
3.12
MuxOneNAND2G(KFM2G16Q2M-DEBx)
MuxOneNAND4G(KFN4G16Q2M-DEBx)
MuxOneNAND8G(KFK8G16Q2M-DEBx)
The Copy-Back program is configured to quickly rewrite data stored in one page without utilizing memory other than OneNAND.
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 block is updated and the rest of the block also need to be copied to the newly assigned
free block.
Data from the source page is saved in one of the on-chip DataRAM buffers and then programmed directly into the destination page.
The DataRAM is overwritten the previous data using the Buffer Sector Address (BSA) and Buffer Sector Count (BSC).
The Copy-Back Program Operation does this by performing sequential page-reads without a serial access and executing a
copy-program using the address of the destination page.
In DDP, copy-back program must be executed within each chip.
Copy-Back Program Operation Flow Chart
3) ’Write 0 to interrupt register’ step may be ignored when using INT auto mode. Refer to chapter 2.8.18.1
2) FBA, FPA and FSA should be input prior to FCBA, FCPA and FCSA.
Write ’BSA, BSC’ of DataRAM
Add: F103h DQ=FCPA, FCSA
Write 0 to interrupt register
Write ’FCPA, FCSA’ of Flash
Add: F200h DQ=BSA, BSC
Add: F100h DQ=DFS*, FBA
Write ’FPA, FSA’ of Flash
Write ’DFS*, FBA’ of Flash
Add: F107h DQ=FPA, FSA
Select DataRAM for DDP
Add: F102h DQ=FCBA
Add: F241h DQ=0000h
Add: F101h DQ=DBS*
Write ’FCBA’ of Flash
Copy-Back Program Operation
Start
* DBS, DFS is for DDP
2)
1)
3)
Write ’Copy-back Program’
Add: F240h DQ[10]=Error
Add: F241h DQ[15]=INT
Add: F220h DQ=001Bh
Copy back completed
low to high transition
Wait for INT register
Read Controller
Status Register
DQ[10]=0?
command
*
116
: If program operation results in an error, map out
the block including the page in error and copy the
target data to another block.
YES
Copy back Error
FLASH MEMORY
NO
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