m28w320fc Numonyx, m28w320fc Datasheet - Page 61

• Manufacturer Part Number: m28w320fc
• Description: 32 Mbit 2mb X16, Boot Block 3v Supply Flash Memory
• Manufacturer: Numonyx

M28W320FCT, M28W320FCB
Figure 21. Erase Suspend & Resume Flowchart and Pseudo Code
Block Protect/Unprotect/Lock
Program/Protection Program
Erase Continues
Read data from
another block
Read Status
Write B0h
Write FFh
Write D0h
Write 70h
Register
b7 = 1
b6 = 1
Start
or
or
YES
YES
NO
NO
Erase Complete
Read Data
Write FFh
erase_suspend_command ( ) {
if (status_register.b6==0) /*erase completed */
else
}
do {
writeToFlash (any_address, 0xB0) ;
writeToFlash (any_address, 0x70) ;
/* read status register to check if
erase has already completed */
} while (status_register.b7== 0) ;
{ writeToFlash (any_address, 0xFF) ;
{ writeToFlash (any_address, 0xFF) ;
}
}
status_register=readFlash (any_address) ;
/* E or G must be toggled*/
read_data ( ) ;
/*read data from another block*/
/*The device returns to Read Array
(as if program/erase suspend was not issued).*/
read_program_data ( );
/*read or program data from another address*/
writeToFlash (any_address, 0xD0) ;
/*write 0xD0 to resume erase*/
Flowcharts and pseudo codes
AI03542b
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