M58WR064F-ZBF View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

M58WR064F-ZBF

64 Mbit (4Mb x16, Multiple Bank, Burst) 1.8V Supply Flash Memory

STMicroelectronics 

M58WR064FT, M58WR064FB

Figure 28. Locking Operations Flowchart and Pseudo Code

Start

Write 60h (1)

Write

01h, D0h or 2Fh

Write 90h (1)

locking_operation_command (address, lock_operation) {

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

/* see note (1) */

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) */

Read Block

Lock States

Locking

NO

change

confirmed?

if (readFlash (address) ! = locking_state_expected)

error_handler () ;

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

YES

Write FFh (1)

End

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

/*see note (1) */

}

Note: 1. Any address within the bank can equally be used.

AI06176b

76/87

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