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Why the least time of watchdog timer is 18ms?
Not knowing your application or context, I cannot give a definite answer. However, having spent 30 years working on US military cockpit avionics display systems, this is a common number used in these contexts for the watchdog timeout period. The video field rate is 60Hz, resulting in a field time of 16.667ms. The watchdog timeout period is set to 18ms to allow a little over a millisecond longer than the field time before resetting the processor, to allow for some video sync timing jitter. Systems that were primarily stroke oriented typically used a watchdog timeout of about 17ms instead, to keep the field rate closer to 60Hz even when a timeout happened. A few systems I worked on had watchdog timeout periods of 0.1s or longer. It all depended on application and context.
What is watchdog timer in microcontroller?
the watchdog timer is a circuit that will simply time out sending an alert telling peripheral devices that data is incorrect or at least non reliable
What does watchdog means in terms of technically?
watchdog timer is a 16 bit counter that resets the processor when it rolls over to zero. The processor can reset the counter or turn it off, but, correctly used, it will reset the processor in case of a code crash
What does a flasher circuit in a ladder logic program look like?
Timer1 Timer2 Done Timing ---|/|---------|/|---------[Timer On - Timer 1]--- Timer2 Timer1 Done Timing ---|/|---------|/|---------[Timer On - Timer 2]--- Timer1 Timing Flash --| |--------------------( )------- Adjust the preset time for timer1 to change your "flash on" duration. Adjust the preset time for timer2 to change your "flash off" duration.
Does this microwave have a timer on it?
Yes this microwave does include a timer. It also has a special sensor that can adjust cooking time and power levels for favorite foods. Yes, this Whirlpool microwave does have a timer on it. You can set it and it will ring telling you that the time is up.
How is the period related to the frequency of a timer?
Period and frequency are mutual reciprocal. Period = 1/frequency Frequency = 1/period
How do you shutdown a computer on the network and set timer and comment?
shutdown -m \\computername - Remote computer to shutdown/restart/abort shutdown -t xx - Set timeout for shutdown to xx seconds
What is the period and frequency of a recording timer?
the period is 1/60 s or 0.017s and the frequency is 60Hz
What is the timer and how do you adjust it on a 86 Honda Accord?
basically it is the distributor. public library usually has books to help
Why is the timer control hidden at the run time in visual basic?
It is not hidden, it simply does not have a visual runtime component for no other reason than that it does not require one. A timer is defined by what occurs when the timeout elapses -- not what happens while the timer is counting. If you require a visual aspect you are free to create one but there's no point in creating a visual component that, in the vast majority of cases, would be completely superfluous.
What does WDT stand for?
WDT stands for Watchdog Timer. It is a hardware mechanism that helps monitor the operation of a system and can reset it if certain events do not occur within a specified time frame.
What is the use of resistance in timer?
The resistor and capacitor helps you to adjust the time period (or frequency) of the timer. (Usually astable multivibrator is used as a timer in electronic circuits) More the resistance, less is the current flowing through it. If the current flowing through is it to charge the capacitor is less, then the capacitor charges slowly. The timer changes it's state when the capacitor charges to a specific voltage ( Usually 1/3Vcc or 2/3Vcc). As it is made to charge slowly due to the high resistance, the clock frequency decreases. In the same way, to increase the frequency of the timer, the resistance value needs to be reduced.
