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| U5020M Datasheet, PDF (6/10 Pages) TEMIC Semiconductors – Digital Window Watchdog Timer | |||
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Figure 6. Pulse Diagram of a Correct Trigger Sequence During the Short Watchdog Time
VDD
Reset out
Mode
t0
t1
t2
t3
t2
Trigger
ttrig
Enable
Pin 13
Pin 10
Pin 12
Pin 11
Pin 9
Figure 7 shows the switch-over from the short to the long watchdog mode. The wake-up
signal during the enable time, t5, activates a reset pulse, t6.
The watchdog can be switched back from the long to the short watchdog mode with a
low potential at the mode pin (pin 12).
Figure 7. Pulse Diagram of the Long Watchdog Time
Reset out
t6
t1
Pin 10
Wake-up
Pins 3 to 8
Mode
t4
t5
Pin 12
t2
Trigger
Pin 11
Enable
Pin 9
6 U5020M
4755AâAUTOâ11/03
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