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I wirte program and compiled in Keil C51 Device:AT89S52 I debugged the program ,I worked well But when I download it to the device It didn't work on the board while the board is fine,other program can work well WHY?
Debuger is not God and you should accompany it through all the branches and conditions of a program. Having info you wrote here, it is not possible to say what is wrong in your program, sorry. Good days!