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receive data in at89c51 with rs232

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electroboy

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i want receive data in at89c51 through rs232 db9 cable... i heard that rs232 inverts the signals, that is, positive for logic 0 and negative for logic 1... should i use NOT gate after max 232 to get normal bits back ? please help.. thanks in advance..
 

yuvko

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nope, the max232 will do this for you, you will receive regular uart out of it.
 

skogsjanne

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No, if you read the datasheet for the MAX232 you will find that it "inverts" the signal.
 
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