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ST72334J Datasheet(PDF) 28 Page - STMicroelectronics |
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ST72334J Datasheet(HTML) 28 Page - STMicroelectronics |
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28 / 125 page  ST72334J/N, ST72314J/N, ST72124J 28/125 RESET SEQUENCE MANAGER (Cont’d) Internal Low Voltage Detection RESET Two different RESET sequences caused by the in- ternal LVD circuitry can be distinguished: s Power-On RESET s Voltage Drop RESET The device RESET pin acts as an output that is pulled low when VDD<VLVDr (rising edge) or VDD<VLVDf (falling edge) as shown in Figure 9. Figure 17. LVD RESET Sequences RESET RUN INTERNAL RESET 4096 CLOCK CYCLES FETCH VECTOR RESET PIN EXTERNAL RESET SOURCE WATCHDOG RESET DELAY RESET RUN INTERNAL RESET 4096 CLOCK CYCLES FETCH VECTOR RUN RESET PIN EXTERNAL RESET SOURCE VDD VDDnominal WATCHDOG RESET DELAY VLVDr VLVDf VDD VDDnominal VLVDr |
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