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STWD100 Datasheet(PDF) 14 Page - STMicroelectronics

Part # STWD100
Description  Watchdog timer circuit
PDF  25 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STWD100 Datasheet(HTML) 14 Page - STMicroelectronics

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Watchdog timing
STWD100
14/25
Figure 10.
Enable pin, EN, triggering
X
DISABLED
X
DISABLED
STWD100xx
STWD100xx
AI12666
Whenever EN is high, all timing is
reset, and the part is disabled.
Timing commences from 0 when
EN goes low.
If EN goes high while WDO is
asserted, WDO will de-assert but
only after the nominal minimum
pulse width of 10 µs has elapsed.
VCC
VCC
WDI
WDI
WDO
WDO
EN
EN
~ 2.2 V
X (ie, 1 or 0 but not floating)
>10 µs min.
X (ie, 1 or 0 but not floating)
< tWD
tWD
tWD
tWD



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