I m using AT89c2051 and using DS1232 to reset the microcontrolller in failed condition. Microcontroller has to give some pulsed signal to DS1232. In any fault condition if microcontroller is nt working, then it will not give the pulsed signal to DS1232, then DS1232 will reset the microcontroller. But here in my circuit if ground pin is open still microcontroller is giving singal to DS1232. and remaining pins are going high....