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MuxOneNAND2G(KFM2G16Q2A-DEBx)
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FLASH MEMORY
MuxOneNAND4G(KFN4G16Q2A-DEBx)
3.12.1 Copy-Back Program Operation with Random Data Input
The Copy-Back Program Operation with Random Data Input in MuxOneNAND consists of 2 phase, Load data into DataRAM, Modify data and
program into designated page. Data from the source page is saved in one of the on-chip DataRAM buffers and modified by the host, then pro-
grammed into the destination page.
As shown in the flow chart, data modification is possible upon completion of load operation. ECC is also available at the end of load operation.
Therefore, using hardware ECC of MuxOneNAND, accumulation of 1 bit error can be avoided.
Copy-Back Program Operation with Random Data Input will be effectively utilized at modifying certain bit, byte, word, or sector of source page
to destination page while it is being copied.
Copy-Back Program Operation with Random Data Input Flow Chart
NOTE :
1) ‘Write 0 to interrupt register’ step
may be ignored when using INT auto mode. (Refer to chapter 2.8.18.1)
Start
Write ‘DFS*, FBA’ of Flash
Add: F100h DQ=DFS, FBA
Write ‘FPA, FSA’ of Flash
Add: F107h DQ=FPA, FSA
Write ‘BSA, BSC’ of DataRAM
Add: F200h DQ=BSA, BSC
Select DataRAM for DDP
Add: F101h DQ=DBS
Write ‘Load’ Command
Add: F220h
DQ=0000h or 0013h
Wait for INT register
low to high transition
Add: F241h DQ[15]=INT
Read Controller
Add: F240h DQ[10]=Error
Status Register
Write 0 to interrupt register
1)
Add: F241h DQ=0000h
DQ[10]=0?
NO
YES
Map Out
Copy back completed
Wait for INT register
low to high transition
Add: F241h DQ[15]=INT
Copy back Error
Random Data Input
Write ‘DFS, FBA’ of Flash
Add: F100h DQ=DFS, FBA
Write ‘FPA, FSA’ of Flash
Add: F107h DQ=FPA, FSA
Write ‘Program’ Command
Add: F220h
DQ=0080h or 001Ah
Write 0 to interrupt register
Add: F241h DQ=0000h
Add: Random Address in
Selected DataRAM
DQ=Data
Read Interrupt register
Add: F241h DQ[6]=WI
DQ[6]=1?
YES
Add: F240h DQ[10]=Error
Read Controller
Status Register
DQ[10]=0?
YES
NO
NO
Add: F240h DQ[14]=Lock
Read Controller Status Register
‘Lock’ bit high
Copy back Program Lock Error
* DBS, DFS is for DDP
(DFS must be same)