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SPC584G80C3 bảng dữ liệu(PDF) 39 Page - STMicroelectronics

tên linh kiện SPC584G80C3
Giải thích chi tiết về linh kiện  32-bit Power Architecture microcontroller for automotive ASIL-D applications
PDF  139 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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SPC584G80C3 bảng dữ liệu(HTML) 39 Page - STMicroelectronics

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DS11758 Rev 6
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SPC584Gx, SPC58EGx, SPC58NGx
Electrical characteristics
41
4.9
Reset pad (PORST, ESR0) electrical characteristics
The device implements dedicated bidirectional reset pins as below specified. PORST pin
does not require active control. It is possible to implement an external pull-up to ensure
correct reset exit sequence. Recommended value is 4.7 K
Ω.
Figure 5. Startup Reset requirements
Figure 6 describes device behavior depending on supply signal on PORST:
1.
PORST low pulse has too low amplitude: it is filtered by input buffer hysteresis. Device
remains in current state.
2.
PORST low pulse has too short duration: it is filtered by low pass filter. Device remains
in current state.
3.
PORST low pulse is generating a reset:
a)
PORST low but initially filtered during at least WFRST. Device remains initially in
current state.
b)
PORST potentially filtered until WNFRST. Device state is unknown. It may either
be reset or remains in current state depending on extra condition (temperature,
voltage, device).
c)
PORST asserted for longer than WNFRST. Device is under reset.
VIL
VDD
PORST
VIH
device start-up phase
VDD_POR
PORST driven low by
device reset
forced by external circuitry
PORST undriven
device reset by
internal power-on reset
internal power-on reset



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