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This fact is especially critical for the write operation for the
WATCHDOG service, as it affects the allowed window for a
valid WATCHDOG service.
If the device runs in active mode, the synchronization pro-
cess can take up to four WATCHDOG counter clock cycles.
This limits the available WATCHDOG service to the window
shown in figure 94:
If the device runs in power save mode, the synchronization
process can take up to eight WATCHDOG counter clock cy-
cles. This limits the available WATCHDOG service to the win-
dow shown in figure 95:
26.3.3
Timing and WATCHDOG Module Problem
Solutions
In order to guarantee a valid WATCHDOG service under all
circumstances, the WATCHDOG should only be serviced
within the guaranteed minimum valid window, as illustrated in
figure 94 and figure 95 in the previous section.
Figure 94.
WATCHDOG Services Windows in Active Mode
Figure 95.
WATCHDOG Services Windows in Power Save Mode
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