DS1705/DS1706

3 of 12

Watchdog Timer

used are the microprocessors address signals, data signals, or control signals. When the microprocessor

functions normally, these signals would, as a matter of routine, cause the watchdog to be reset prior to

time-out. To guarantee that the watchdog timer does not time out, a high-to-low transition must occur at

or less than the minimum watchdog time-out of 1 second. A typical circuit example is shown in Figure 6.

MICROMONITOR BLOCK DIAGRAM

Figure 1

40k



180k



PUSH-BUTTON RESET

Figure 2