M58WR064HT datasheet(99/111 Pages) NUMONYX

Part #	M58WR064HT

Description	64 Mbit (4Mb x16, Multiple Bank, Burst) 1.8V supply Flash memories

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Manufacturer	NUMONYX [Numonyx B.V]

Direct Link	http://www.numonyx.com

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99 / 111 page

M58WR064HT, M58WR064HB

Flowcharts and pseudo codes

99/111

Figure 24.

Erase Suspend & Resume Flowchart and Pseudo Code

1.

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

Write 70h

AI10116b

Read Status

Register

YES

NO

SR7 = 1

YES

NO

SR6 = 1

Erase Continues with

Bank in Read Status

Register Mode

Write D0h

Read data from another block

or

Program/Protection Register Program

or

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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