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U5021M Datasheet(PDF) 6 Page - ATMEL Corporation |
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U5021M Datasheet(HTML) 6 Page - ATMEL Corporation |
6 / 11 page 6 4756D–AUTO–11/05 U5021M Figure 4-4. Pulse Diagram of a Correct Trigger Sequence During the Short Watchdog Time Figure 4-5 shows the switch-over from the short to the long watchdog mode. The wake-up signal during the enable time, t 5, activates a reset pulse, t6. The watchdog can be switched back from the long to the short watchdog mode with a low poten- tial at the mode pin (pin 3). Figure 4-5. Pulse Diagram of the Long Watchdog Time 5. State Diagram The kernel of the watchdog is a finite state machine. Figure 5-1 shows the state diagram with all possible states and transmissions. Many transmissions are controlled by an internal timer. The numbers for the time-outs are the same as on the pulse diagrams. V DD Reset out Mode Trigger Enable t 0 Pin 4 Pin 2 Pin 3 Pin 5 Pin 6 t 1 t 2 t 3 t 2 t trig t 2 Wake-up Enable Mode Trigger Reset out Pin 4 Pin 2 Pin 3 Pins 1 Pin 5 t 4 t 5 t 6 t 1 |
Similar Part No. - U5021M_05 |
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Similar Description - U5021M_05 |
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