MICROPROCESSOR 8086
ARCHITECTURE OF 8085
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Timer used to detect a system problem
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A converter to convert Analog to Digital
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Random Access Memory
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A timer case a microcontroller to respond to external and internal events
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Detailed explanation-1: -A watchdog timer (WDT) is a timer that monitors microcontroller (MCU) programs to see if they are out of control or have stopped operating. It acts as a “watchdog” watching over MCU operation. A microcontroller (MCU) is a compact processor for controlling electronic devices.
Detailed explanation-2: -A watchdog timer is a simple countdown timer which is used to reset a microprocessor after a specific interval of time. In a properly operating system, software will periodically “pet” or restart the watchdog timer. After being restarted, the watchdog will begin timing another predetermined interval.
Detailed explanation-3: -Explanation: The watchdog timer is used for the protection of the device. It keeps a track at the counter so that the code doesn’t reach an infinite unending loop. So it actually resets the counter before this particular condition.
Detailed explanation-4: -A watchdog timer is used to reset or reboot the system in case of hang or critical failure from a unresponsive state to a normal state. A watchdog timer can be set with a time interval. Continuously refreshing the watchdog timer within the specified time interval prevents the a reset or reboot.
Detailed explanation-5: -Watchdog timers are used in PLCs to flag if the scan time exceeds a predetermined limit. This timer basically monitors the execution time of a certain task and when it exceeds the permitted time it produces a signal. The Watchdog timer runs while the program scan is active, and it is reset at the end of every scan.