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L9678P датащи(PDF) 135 Page - STMicroelectronics

номер детали L9678P
подробное описание детали  Automotive user configurable airbag IC
PDF  203 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9678P датащи(HTML) 135 Page - STMicroelectronics

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L9678P, L9678P-S
Watchdog timer
202
Figure 37. Watchdog timer refresh diagram
8.2
Watchdog reset assertion timer
Upon a watchdog reset, the watchdog logic will momentarily assert the RESET pin for time
duration twdrst. When the RESET pin has been asserted through the watchdog reset
assertion timer, stored faults are maintained and can be read by the microcontroller via SPI
following the RESET period.
8.3
Watchdog timer disable input (WDT/TM)
This input pin has a passive pull-down and is used to disable the watchdog timer. The state
of this pin can be read by SPI through the WDTDIS_S bit in the GSW register. When
WDT/TM pin is asserted, the watchdog timer is disabled, the timer is reset to its starting
value and no faults are generated.



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