TPS-1 User’s Manual: Hardware 7. TPS-1 Watchdog
R19UH0081ED0107 Rev. 1.07 page 50 of 86
Jul 30, 2018
7.2. Signal WD_IN (pin A11)
The signal WD_IN is implemented as a watchdog trigger. When recognizing the host watchdog event, the TPS-1 generates a diagnostic alarm and sets
the IOPS of the input data to the BAD state.
The watchdog start of the host CPU depends on the individual host. The TPS-1 starts checking the host watchdog when receiving the event
“APP_EVENT_CONFIG_FINISHED”.
The Watchdog Interval can be configured with the TPS Configurator. This information is written into the Boot Flash and is active after the next restart.
The watchdog interval can be chosen between 1 ms and 512 ms. During the development you can disable the Host CPU watchdog by setting the
interval value to “0” (TPS Configurator). Be aware that the watchdog must be activated to avoid unsecure operations of the device.
TPS
-1
HOST-CPU
WD_IN
WD_OUT
HostWatchdogTime
Figure 7-2: Watchdog Characteristics
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