hi to all i am using at89c55wd the problem is when i tried to toggle the P3 all bit i.e. P3.0,1,2,3,4,6,7 changes its state expect P3.5 i used timer 0 as timer after 1 sec i invert the P3. position by P3=~P3 but P3.5 unchanged all other toggle between 0 and 1.P3.5 toggle properly on simulator but not at h/w side.
i tried it by changing the perticuler bit i.e. P3.5 but did not work please help me