M58LT256JSB8ZA6 STMICROELECTRONICS [STMicroelectronics], M58LT256JSB8ZA6 Datasheet - Page 93

• Manufacturer Part Number: M58LT256JSB8ZA6
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

M58LT256JST, M58LT256JSB
Figure 25. Protect/Unprotect operation flowchart and pseudocode
1. Any address within the bank can equally be used.
Write FFh (1)
Write 60h (1)
Write 90h (1)
Protect State
Read Block
confirmed?
Protection
01h, D0h
change
Write
Start
End
YES
NO
protect_operation_command (address, protect_operation) {
}
writeToFlash (address, 0xFF) ; /*Reset to Read Array mode*/
writeToFlash (address, 0x60) ; /*configuration setup*/
if (protect_operation==PROTECT) /*to protect the block*/
else if (protect_operation==UNPROTECT) /*to unprotect the block*/
if (readFlash (address) ! = protection_state_expected)
writeToFlash (address, 0x01) ;
writeToFlash (address, 0xD0) ;
writeToFlash (address, 0x90) ;
/*Check the protection state (see Read Block Signature table )*/
error_handler () ;
/*see note (1) */
/*see note (1) */
/* see note (1) */
Flowcharts and pseudocodes
AI12895
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