m58lt256jsb STMicroelectronics, m58lt256jsb Datasheet - Page 95

• Manufacturer Part Number: m58lt256jsb
• Description: 256 Mbit 16 Mb 16, Multiple Bank, Multilevel, Burst 1.8 V Supply, Secure Flash Memories
• Manufacturer: STMicroelectronics

M58LT256JST, M58LT256JSB
Figure 25. Protect/unprotect operation flowchart and pseudocode
1. Any address within the bank can equally be used.
Write 60h (1)
Write 90h (1)
Protect State
Write FFh (1)
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
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