i have microcontroller board from my …in this borad simple microcontroller require peripheral (reset ckt,crystl oscilator.reisster etc).bt difficulty is this ckt having one more pullup registers are attached on all port…(means by default pullup is there on port 1,2,3 bt again pullup r connected on all port ,0,1,2,3,)..if i want zero or 5v on output …what i need to provide logic in my c code so i will able to get output according to my programing …means if i want high logic on output what i have to give logic in program …thanks and plz rply..