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ST72141K データシート(PDF) 21 Page - STMicroelectronics

部品番号 ST72141K
部品情報  8-BIT MCU WITH ELECTRIC-MOTOR CONTROL, ADC, 16-BIT TIMERS, SPI INTERFACE
PDF  132 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST72141K データシート(HTML) 21 Page - STMicroelectronics

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RESET MANAGER (Cont’d)
Internal Low Voltage Detection RESET (option)
Two different RESET sequences caused by the in-
ternal LVD circuitry can be distinguished:
- LVD Power-On RESET
- Voltage Drop RESET
In the second sequence, a “delay” phase is used
to keep the device in RESET state until VDD rises
up to VLVDr (see Figure 13).
Figure 13. LVD RESET Sequences
RESET
RUN
INTERNAL RESET
4096 CLOCK CYCLES
FETCH
VECTOR
POWER-
RESET PIN
EXTERNAL RESET SOURCE
WATCHDOG RESET
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
OFF



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