M58WR064 STMICROELECTRONICS [STMicroelectronics], M58WR064 Datasheet - Page 71

• Manufacturer Part Number: M58WR064
• Description: 64 Mbit 4Mb x 16, Multiple Bank, Burst 1.8V Supply Flash Memory
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Figure 27. Locking Operations Flowchart and Pseudo Code
Note: 1. Any address within the bank can equally be used.
01h, D0h or 2Fh
Write FFh (1)
Write 60h (1)
Write 90h (1)
Read Block
Lock States
confirmed?
Locking
change
Write
Start
End
YES
NO
locking_operation_command (address, lock_operation) {
}
writeToFlash (address, 0xFF) ; /*Reset to Read Array mode*/
writeToFlash (address, 0x60) ; /*configuration setup*/
if (lock_operation==LOCK) /*to protect the block*/
else if (lock_operation==UNLOCK) /*to unprotect the block*/
else if (lock_operation==LOCK-DOWN) /*to lock the block*/
if (readFlash (address) ! = locking_state_expected)
writeToFlash (address, 0x01) ;
writeToFlash (address, 0xD0) ;
writeToFlash (address, 0x2F) ;
writeToFlash (address, 0x90) ;
/*Check the locking state (see Read Block Signature table )*/
error_handler () ;
/*see note (1) */
/*see note (1) */
/* see note (1) */
M58WR064ET, M58WR064EB
AI06176b
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