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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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ST72345C4 Datenblatt(PDF) 34 Page - STMicroelectronics |
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ST72345C4 Datenblatt(HTML) 34 Page - STMicroelectronics |
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34 / 247 page  Data EEPROM ST72344xx, ST2345xx 34/247 Doc ID 12321 Rev 6 5.6 Data EEPROM readout protection The readout protection is enabled through an option bit (see Section 15.1: Option bytes). When this option is selected, the programs and data stored in the EEPROM memory are protected against read-out (including a rewrite protection). In Flash devices, when this protection is removed by reprogramming the option byte, the entire Program memory and EEPROM is first automatically erased. Note: Both program memory and data EEPROM are protected using the same option bit. Figure 10. Data EEPROM programming cycle E2LAT ERASE CYCLE WRITE CYCLE E2PGM tPROG READ OPERATION NOT POSSIBLE WRITE OF DATA READ OPERATION POSSIBLE INTERNAL PROGRAMMING VOLTAGE LATCHES I bit in CC register All interrupts must be masked 1) Note 1: refer to Programming of EEPROM data |
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