Whats the feature of Watch dog Timer?

A timing device such that it is set for a 

preset time interval and an event must occur 

during that interval else the device will 

generate the timeout signal on failure to get 

that event in the watched time interval.

On that event, the watchdog timer is 

disabled to disable generation of timeout or 

reset 

Timeout may result in processor start a 

service routine or start from beginning

timer used to recover malfunction

detect and trigger a processor reset

watch dog timer is very important feature for any critical part in your project where the time for this part (some of instructions ) exceeds the configure time , microcontroller will reset Automatically

electronic timer which used to detect and recover from malfunction of computer during normal operation

Restart the system if any instructions is excuted more times.

Control reset pin function

Selectable clock source

watchdog mode

interval mode

Watchdog timer is reponsible for reset the CPU if hang.

It's a timer which can be set to certain time in a microcontroller, which recovers the controller from getting into malfunctioning or not working state when timer time is reached.

The WDT is similar to the Master Clear External Reset on a hardware, when activated and place the Program Counter back to the beginning of the program software (org 0). The WDT is activated when its time-out period is exceeded. It is a free running timer independent of ...

used to reset the system if the compiler stucked in any instruction