I have made a system using 89c2051 and it senses a port bit whether it is high three times at intervals of 15 minutes and performs other duties. This checking goes on day in and out.
My question is what is the reasonable life of the chip if this goes on like this without any respite.
I have considered the question of using the idle provision but am unable to use that effectively.
Hope some of you will have an answer for me.