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ST72334J bảng dữ liệu(PDF) 27 Page - STMicroelectronics

tên linh kiện ST72334J
Giải thích chi tiết về linh kiện  8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, SCI INTERFACES
PDF  125 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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ST72334J bảng dữ liệu(HTML) 27 Page - STMicroelectronics

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ST72334J/N, ST72314J/N, ST72124J
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RESET SEQUENCE MANAGER (Cont’d)
External RESET pin
The RESET pin is both an input and an open-drain
output with integrated RON weak pull-up resistor.
This pull-up has no fixed value but varies in ac-
cordance with the input voltage. It can be pulled
low by external circuitry to reset the device.
A RESET signal originating from an external
source must have a duration of at least tPULSE in
order to be recognized. Two RESET sequences
can be associated with this RESET source as
shown in Figure 16.
Starting from the external RESET pulse recogni-
tion, the device RESET pin acts as an output that
is pulled low during at least tDELAYmin.
Figure 16. External RESET Sequences
RESET
RUN
DELAY
INTERNAL RESET
4096 CLOCK CYCLES
FETCH
VECTOR
RUN
RESET PIN
EXTERNAL RESET SOURCE
tPULSE
VDD
VLVDf
VDDnominal
WATCHDOG RESET
RESET
RUN
INTERNAL RESET
4096 CLOCK CYCLES
FETCH
VECTOR
RUN
RESET PIN
EXTERNAL RESET SOURCE
tPULSE
WATCHDOG RESET
DELAY
VDD
VLVDf
VDDnominal
tDELAYmin



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