Sir, I am using 89c4051 to convert digital to analog. pin 1.0 and 1.1 are used, but I am confused how to us? please help me I don't know anything.
Is this the same project with AT89C4051 with DAC/ADC or another one? Is there a problem in serial communication with another device ? Is there a problem with ISP ? Please describe the issue (mcu, board, connections), a "not working" is not enough.
The problem got resolved, now its working. I don't know exactly where the problem was. sometimes communication happens and sometimes it won't communicate...
Thank you
So this is part of your job?
mcu 89v51rd2 is not communicating serially. rs232 cable is working. mcu was communicating 4 days before, but now it is not communicating.. I have lost 2 mcu. what would be the problem? check that your MAX232(equivalent) is connected correctly. do not remember how, but remember it was the transciever connection
Erik
The problem got resolved, now its working. I don't know exactly where the problem was.
Then the problem has not been resolved. It's just gone away for now. But if you don't know what the problem was, then it cannot possibly have been resolved.