M58LR128HT datasheet(99/112 Pages) STMICROELECTRONICS

Part #	M58LR128HT

Description	128 Mbit (8 Mb ×16, Multiple Bank, Multilevel interface, Burst) 1.8 V supply Flash memories

PDF	112 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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99 / 112 page

M58LR128HT, M58LR128HB

Flowcharts and pseudocodes

99/112

Figure 25.

Locking Operations flowchart and pseudocode

Any address within the bank can equally be used.

Write

01h, D0h or 2Fh

AI06176b

Read Block

Lock States

YES

Locking

change

confirmed?

Start

Write 60h (1)

locking_operation_command (address, lock_operation) {

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

/* 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) */

M58LR128HT Datasheet(PDF) 99 Page - STMicroelectronics