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ST72334J データシート(PDF) 28 Page - STMicroelectronics

部品番号 ST72334J
部品情報  8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, SCI INTERFACES
PDF  125 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST72334J データシート(HTML) 28 Page - STMicroelectronics

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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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