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STWD100 Datasheet(PDF) 12 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) 12 Page - STMicroelectronics

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Watchdog timing
STWD100
12/25
Figure 8.
Timeout without re-trigger
X
X
STWD100xP
STWD100xW,
STWD100xX,
STWD100xY
AI12664
After a timeout and WDO is
asserted, it will stay low for
tPW time period, then
return high. If no WDI trigger
event occurs within tWD
time period, WDO will again
assert low. This cycle repeats
until a WDI trigger event
occurs while WDO is high.
After a timeout and WDO is
asserted, it will stay low for
tWD time period, then
return high. If no WDI trigger
event occurs, WDO will again
assert low after tWD time
period. This cycle repeats
until a WDI trigger event
occurs.
VCC
VCC
WDI
WDI
WDO
WDO
EN
EN
tWD
tWD
tWD
tWD
tWD
tWD
tWD
tWD
tWD
tWD
tPW
tPW
tPW



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