m58lt256jsb STMicroelectronics, m58lt256jsb Datasheet - Page 90

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

Flowcharts and pseudocodes
Figure 20. Blank check flowchart and pseudocode
1. Any address within the bank can equally be used.
2. If an error is found, the Status Register must be cleared before further Program/Erase operations.
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Status Register (1)
Address & BCh
Address & CBh
Write Block
Write Block
SR7 = 1
SR4 = 1
SR5 = 1
SR5 = 0
Read
Start
End
YES
NO
YES
NO
Blank Check Error (2)
Command Sequence
Error (2)
blank_check_command (blockToCheck) {
}
writeToFlash (blockToCheck, 0xBC);
writeToFlash (blockToCheck, 0xCB);
/* Memory enters read status state after
the Blank Check Command */
do {
if (status_register.SR4==1) && (status_register.SR5==1)
/* command sequence error */
if (status_register.SR5==1)
/* Blank Check error */
status_register = readFlash (blockToCheck);
/* E or G must be toggled */
} while (status_register.SR7==0);
error_handler () ;
error_handler () ;
M58LT256JST, M58LT256JSB
/* see note (1) */
ai10520c