Samsung FLEX-MUXONENAND KFN8GH6Q4M - Manual (Page 64)

Flex-MuxOneNAND4G(KFM4GH6Q4M-DEBx)
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FLASH MEMORY
Flex-MuxOneNAND8G(KFN8GH6Q4M-DEBx)
Flex-MuxOneNAND16G(KFKAGH6Q4M-DEBx)
All Block Unlock Flow Diagram
*Samsung strongly recommends to follow the above 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
2) All Block Unlock command fails if there are lock-tight blocks in flash.
Start
Write ‘All Block Unlock’
Add: F220h
DQ=0027h
Wait for INT register
low to high transition
Add: F241h DQ[15]=INT
Command
Write 0 to interrupt register 1)
Add: F241h DQ=0000h
Write ‘DFS*, of Flash
Add: F100h DQ=DFS*
Write ‘SBA’ of Flash
Add: F24Ch DQ=SBA(000h)
Select DataRAM for DDP
Add: F101h DQ=DBS*
Read Controller Status
Add: F240h
DQ[10]=Error
Register
All Block Unlock
completed
DQ[10]=0?
All Block Unlock Failed 2)
YES NO
* DBS, DFS is for DDP