Flowcharts and pseudocodes
M58LT256JST, M58LT256JSB
Figure 24. Erase suspend and resume flowchart and pseudocode
Start
erase_suspend_command ( ) {
Write B0h
Write 70h
writeToFlash (bank_address, 0xB0) ;
writeToFlash (bank_address, 0x70) ;
/* read status register to check if
erase has already completed */
do {
Read Status
Register
status_register=readFlash (bank_address) ;
/* E or G must be toggled*/
NO
NO
} while (status_register.SR7== 0) ;
SR7 = 1
YES
SR6 = 1
Erase Complete
Write FFh
if (status_register.SR6==0) /*erase completed */
{ writeToFlash (bank_address, 0xFF) ;
read_data ( ) ;
Read Data
/*The device returns to Read Array
(as if program/erase suspend was not issued).*/
YES
}
else
Write FFh
{ writeToFlash (bank_address, 0xFF) ;
read_program_data ( );
Read data from another block
or
Program
or
Block Protect/Unprotect
/*read or program data from another block*/
writeToFlash (bank_address, 0xD0) ;
/*write 0xD0 to resume erase*/
Write D0h
writeToFlash (bank_address, 0x70) ;
/*read status register to check if erase has completed */
(1)
Write 70h
}
}
Erase Continues with
Bank in Read Status
Register Mode
AI12897b
1. The Read Status Register command (Write 70h) can be issued just before or just after the Erase Resume command.
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NUMONYX [ NUMONYX B.V ]
