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hi i am using at89c51 controller along with jhd162a while printing the number like 1234 it prints as 1133,this error does not happens always, only few times it prints correctly as 1234 ,but most of the time it prints with error as like 1133,even i ve changed the circuit board still it prints with the same error please guide me to solve the problem thanks in advance
Far more likely to be an error in your code and/or hardware. A common error there would be timing...
Have you used an oscilloscope to verify that the interface timing, etc, is correct?
"i simulated the code in keil software it works without error i have simulated in proteus VSM the code works fine"
So think about the kinds of problems that would not be evident in a simulation...