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MuxOneNAND2G(KFM2G16Q2A-DEBx)
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FLASH MEMORY
MuxOneNAND4G(KFN4G16Q2A-DEBx)
3.13.4 Erase Suspend / Erase Resume Operation
The Erase Suspend/Erase Resume Commands interrupt and restart a Block Erase or Multi-Block Erase operation so that user may perform
another urgent operation on the block that is not being designated by Erase/Multi-Block Erase Operation.
Erase Suspend During a Block Erase Operation
When Erase Suspend command is written during a Block Erase or Multi-Block Erase operation, the device requires a maximum of 500us to
suspend erase operation. Erase Suspend Command issue during Block Address latch sequence is prohibited.
After the erase operation has been suspended, the device is ready for the next operation including a load, program, copy-back program, Lock,
Unlock, Lock-tight, Hot Reset, NAND Flash Core Reset, Command Based Reset, Multi-Block Erase Read Verify, or OTP Access.
The subsequent operation can be to any block that was NOT being erased.
A special case arises pertaining Erase Suspend to the OTP. A Reset command is used to exit from the OTP Access mode. If the Reset-trig-
gered exit from the OTP Access Mode happens during an Erase Suspend Operation, the erase routine could fail. Therefore to exit from the
OTP Access Mode without suspending the erase operation stop, a 'NAND Flash Core Reset' command should be issued.
For the duration of the Erase Suspend period the following commands are not accepted:
Block Erase/Multi-Block Erase/Erase Suspend
Erase Suspend and Erase Resume Operation Flow Chart
NOTE :
1) Erase Suspend command input is prohibited during Multi Block Erase address latch period.
2) If OTP access mode exit happens with Reset operation during Erase Suspend mode,
reset operation could hurt the erase operation.
So if a user wants to exit from OTP access mode without the erase operation stop, Reset NAND Flash Core command should be used.
3) ‘Write 0 to interrupt register’ step may be ignored when using INT auto mode. Refer to chapter 2.8.18.1.
Start
Write ‘Erase Suspend
Add: F220h DQ=00B0h
Wait for INT register
Add: F241h DQ=[15]=INT
low to high transition for 500us
Command’
1)
Write 0 to interrupt register
3)
Add: F241h DQ=0000h
Write ‘Erase Resume
Add: F220h DQ=0030h
Wait for INT register
Add: F241h DQ=[15]=INT
low to high transition
Write 0 to interrupt register
3)
Add: F241h DQ=0000h
Command’
Another Operation
*
* Another Operation ; Load, Program
Copy-back Program, OTP Access
2)
,
Hot Reset, Flash Reset, CMD Reset,
Multi Block Erase Verify, Lock,
Lock-tight, Unlock
Check Controller Status Register
Do Multi Block Erase Verify Read
in case of Block Erase
in case of Multi Block Erase
Select DataRAM for DDP
Add: F101h DQ=DBS**
Write DFS of Flash
Add: F100h DQ=DFS**
Select DataRAM for DDP
Add: F101h DQ=DBS**
** DBS, DFS is for DDP
(DBS must be same)