M58PR256LE datasheet(106/119 Pages) STMICROELECTRONICS

106 / 119 page

Flowcharts and pseudocodes

M58PR256LE, M58PR512LE, M58PR001LE

106/119

Figure 24.

Erase suspend and resume flowchart and pseudocode

The Read Status Register command (Write 70h) can be issued just before or just after the Erase Resume command.

Write 70h

AI10116c

Read Status

YES

SR7 = 1

YES

SR6 = 1

Erase continues with

bank in Read Status

Write D0h

Read data from another block

Program/Set Configuration Register

Block Lock/Unlock/Lock-Down

Start

Write B0h

Erase Complete

Write FFh

Read Data

Write FFh

erase_suspend_command ( ) {

writeToFlash (bank_address, 0xB0) ;

writeToFlash (bank_address, 0x70) ;

/* read status register to check if

erase has already completed */

do {

status_register=readFlash (bank_address) ;

/* E or G must be toggled*/

} while (status_register.SR7== 0) ;

if (status_register.SR6==0) /*erase completed */

{ writeToFlash (bank_address, 0xFF) ;

read_data ( ) ;

/*The device returns to Read Array

(as if program/erase suspend was not issued).*/

}

else

{ writeToFlash (bank_address, 0xFF) ;

read_program_data ( );

/*read or program data from another block*/

writeToFlash (bank_address, 0xD0) ;

/*write 0xD0 to resume erase*/

writeToFlash (bank_address, 0x70) ;

/*read status register to check if erase has completed */

}

Write 70h(1)

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