• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 62 subscribers
  • Views 876 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPS3828-50 WDI disable

Jake Jung
Expert 1915 points
Other Parts Discussed in Thread: TPS3820

Hi Tiers.

I can not understanding below.

The watchdog timer can be disabled by disconnecting the WDI pin from the system. If the WDI pin detects that it
is in a high-impedance state the TPS3820/3/4/8 will generate its own WDI pulse to ensure that RESET does not
assert. If this behavior is not desired place a 1kΩ resistor from WDI to ground. This resistor will help ensure that
the TPS3820/3/4/8 detects that WDI is not in a high-impedance state.

If I do not need watchdog, is WDI pin is floated? or 1Kohm Pulled down?

  • 0
    TI__Guru 55940 points

    Hi SS Jung,

    If you do not need the watchdog, WDI should be floated.

    From a system level, floating the watchdog will be disabled when WDI is floated because the watchdog will not generate a RESET event.  Internally the watchdog will still be running, but the internal oscillator will be resetting the watchdog timer.

    Very Respectfully,

    Ryan