Window Interrupt - Silicon Laboratories EFR32xG14 Wireless Gecko Reference Manual

14.3.6 Window Interrupt

This interrupt occurs when the watchdog is cleared below a certain threshold. This threshold is given by the formula:
where f is the frequency of the selected clock.
This value will be approximately 12.5%, 25%, 37.5%, 50%, 62.5%, 75%, or 87.5% of the timeout value based on the WINSEL field of
the WDOGn_CTRL. Figure 14.2 WDOG Warning, Window, and Timeout on page 407
out interrupts. Also, it shows where the prs rising edge needs to happen. The prs edge detection feature is discussed later.
Timeout period
Warning Irq
Legal Window
When the watchdog is enabled, it is recommended to clear the watchdog before changing WINSEL.
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3+PERSEL
T = (2
WARNING
Counter value
Watchdog clear
PRS Event
Figure 14.2. WDOG Warning, Window, and Timeout
) * (WINSEL/8) + 1)/f,
illustrates the warning, the window, and the time-
Reference Manual
WDOG - Watchdog Timer
System reset
Time
Rev. 1.1 | 407