M36W432T Datasheet, PDF (53/57 Pages) STMicroelectronics – 32 Mbit 2Mb x16, Boot Block Flash Memory and 4 Mbit 256K x16 SRAM, Multiple Memory Product

Figure 29. Erase Suspend & Resume Flowchart and Pseudo Code
M36W432T, M36W432B
Start
Write B0h
Write 70h
Read Status
Register
NO
b7 = 1
YES
NO
b6 = 1
YES
Write FFh
Erase Complete
Read data from
another block
or
Program/Protection Program
or
Block Protect/Unprotect/Lock
Write D0h
Write FFh
Erase Continues
Read Data
erase_suspend_command ( ) {
writeToFlash (any_address, 0xB0) ;
writeToFlash (any_address, 0x70) ;
/* read status register to check if
erase has already completed */
{
status_register=readFlash (any_address) ;
/* EF or GF must be toggled*/
} while (status_register.b7== 1) ;
if (status_register.b6==1) /*erase completed */
{ writeToFlash (any_address, 0xFF) ;
read_data ( ) ; /*read data from another block*/
/*The device returns to Read Array
(as if program/erase suspend was not issued).*/
}
else
{ read_program_data ( );
/*read or program data from another address*/
writeToFlash (any_address, 0xD0) ;
/*write 0xD0 to resume erase*/
}
}
AI05226
53/57