M58PR512LE datasheet(111/123 Pages) NUMONYX

111 / 123 page

M58PR512LE, M58PR001LE

Flowcharts and pseudocodes

111/123

Figure 29.

Main array and EFA locking operations flowchart and pseudocode

Any address within the bank can equally be used.

Write

01h, D0h or 2Fh

AI10518

Read Block

Lock States

YES

Locking

change

confirmed?

Start

Write 60h (Main Array)

or 64h (EFA) (1)

locking_operation_command (address, lock_operation) {

/* EFA_locking_operation_command (address, lock_operation) { */

writeToFlash (address, 0x60) ; /*configuration setup*/

/* writeToFlash (address, 0x64) */

/* 60h is the command for Locking Operations on the array while 64h

is the command for Locking Operations on the EFA */

/* see note (1) */

if (readFlash (address) ! = locking_state_expected)

error_handler () ;

/*Check the locking state (see Read Block Signature table )*/

writeToFlash (address, 0xFF) ; /*Reset to Read Array mode*/

/*see note (1) */

}

Write FFh (1)

Write 90h (1)

End

if (lock_operation==LOCK) /*to protect the block*/

writeToFlash (address, 0x01) ;

else if (lock_operation==UNLOCK) /*to unprotect the block*/

writeToFlash (address, 0xD0) ;

else if (lock_operation==LOCK-DOWN) /*to lock the block*/

writeToFlash (address, 0x2F) ;

writeToFlash (address, 0x90) ;

/*see note (1) */

M58PR512LE Datasheet(PDF) 111 Page - Numonyx B.V

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