M36W832BE-ZAT 查看數據表（PDF） - STMicroelectronics

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M36W832BE-ZAT

32 Mbit (2Mb x16, Boot Block) Flash Memory and 8 Mbit (512Kb x16) SRAM, Multiple Memory Product

STMicroelectronics 

Figure 32. Locking Operations Flowchart and Pseudo Code

M36W832TE, M36W832BE

Start

Write 60h

Write

01h, D0h or 2Fh

Write 90h

Read Status

Register

Locking

NO

change

confirmed?

YES

Write FFh

End

locking_operation_command (address, lock_operation) {

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

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

writeToFlash (address, 0x01) ;

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

writeToFlash (address, 0xD0) ;

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

writeToFlash (address, 0x2F) ;

writeToFlash (any_address, 0x90) ;

if (readFlash (address) ! = locking_state_expected)

error_handler () ;

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

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

}

AI90179

59/64

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