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M58PR256J Folha de dados(PDF) 102 Page - STMicroelectronics

Nome de Peças M58PR256J
Descrição Electrónicos  256 Mbit or 512 Mbit (x16, Multiple Bank, Multilevel, Burst) 1.8 V supply Flash memories
PDF  114 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M58PR256J Folha de dados(HTML) 102 Page - STMicroelectronics

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Flowcharts and pseudo codes
M58PR256J, M58PR512J
102/114
Figure 25.
Main Array and EFA locking operations flowchart and pseudo code
1.
Any address within the bank can equally be used.
Write
01h, D0h or 2Fh
AI10518
Read Block
Lock States
YES
NO
Locking
change
confirmed?
Start
Write 60h (Main Array)
or 64h (EFA) (1)
locking_operation_command (address, lock_operation) {
/* EFA_locking_operation_command (address, lock_operation) { */
writeToFlash (address, 0x60) ; /*configuration setup*/
/* writeToFlash (address, 0x64) */
/* 60h is the command for Locking Operations on the array while 64h
is the command for Locking Operations on the EFA */
/* 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) */



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