7782 datasheet(59/63 Pages) STMICROELECTRONICS

部件名	7782

功能描述	32 Mbit (2Mb x 16, Dual Bank, Burst ) 1.8V Supply Flash Memory

PDF	63 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

59 / 63 page

59/63

M58CR032C, M58CR032D

Figure 24. Locking Operations Flowchart and Pseudo Code

Write

01h, D0h or 2Fh

AI05281

Read Block

Lock States

YES

Locking

change

confirmed?

Start

Write 60h

locking_operation_command (address, lock_operation) {

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

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*/

}

Write FFh

Write 90h

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 (any_address, 0x90) ;

7782 数据表(PDF) 59 Page - STMicroelectronics