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Application Note : Watchdog Timers (WDT)

Watchdog Timers

Watchdog Timer (WDT) is an IC to monitor the proper functioning of the system with reference to detecting a timer reset by an input clock within a set monitoring period of timer.
If not being input a clock signal within the period by the system's abnormal operating, the reset signal is output. And, the WDT can detect a abnormal reduction of the supply voltage with high accuracy.

Watchdog Timer

  1. *1 The MR pin is implemented only on the R5107.
  2. *2 The function of the CD pin is integrated with CTW pin and named the CT pin on the R5106.
  3. *3 CD is the capacitor for setting the VD output delay time.
  4. *4 The function of the CTW pin is integrated with CD pin and named the CT pin on the R5106.
  5. *5 CTW is the capacitor for setting the WDT monitoring time.
  6. *6 The SENSE pin is implemented only on the R5108.

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