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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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ST72334J2TA/XXX 데이터시트(PDF) 21 Page - STMicroelectronics |
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ST72334J2TA/XXX 데이터시트(HTML) 21 Page - STMicroelectronics |
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21 / 150 page  ST72334xx-Auto, ST72314xx-Auto, ST72124Jx-Auto 21/150 DATA EEPROM (Cont’d) 6.4 POWER SAVING MODES Wait mode The Data EEPROM can enter Wait mode on exe- cution of the WFI instruction of the microcontroller. The Data EEPROM will immediately enter this mode if there is no programming in progress, oth- erwise the Data EEPROM will finish the cycle and then enter Wait mode. Halt mode The Data EEPROM immediately enters Halt mode if the microcontroller executes the HALT instruc- tion. Therefore the EEPROM will stop the function in progress, and data may be corrupted. 6.5 ACCESS ERROR HANDLING If a read access occurs while LAT=1, then the data bus will not be driven. If a write access occurs while LAT=0, then the data on the bus will not be latched. If a programming cycle is interrupted (by software/ RESET action), the memory data will not be guar- anteed. Figure 8. Data EEPROM Programming Cycle LAT ERASE CYCLE WRITE CYCLE PGM tPROG READ OPERATION NOT POSSIBLE WRITE OF DATA LATCHES READ OPERATION POSSIBLE INTERNAL PROGRAMMING VOLTAGE EEPROM INTERRUPT |
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