http://www.8051projects.net/ Learn to make simple microcontroller projects, pic, 8051, avr and arm projects. download 8051 projects, tutorials, libraries, sample codes. join the microcontroller discussion forum and ask doubts regarding electronics. the best source for 8051 over internet. en-gb 2009-01-08T09:19:27-08:00 contact@nospam.com hourly 1 2000-01-01T12:00+00:00 http://www.8051projects.net/forum-t11904.html 2009-01-08T09:19:27-08:00 hey cud you tell me what is the output of of ADC in terms of? Like as binary data or wt? Hw does controller recognize it? In my application i have to compare the output data of ADC with a reference value so m confused like will MC recognize data as HEX no or BINARY data.................or wt?? http://www.8051projects.net/forum-t11904.html 2009-01-08T09:19:27-08:00 sashijoseph The ADC's output is a binary representation of the input signal.For eg if you have a 8-bit parallel adc configured for an input analog range of 0 to 5v,then for an input voltage of 0v you'll get as 00000000(00h) the binary value at the data pins.For 5v input you'll get 11111111 (0FFh).So just read in the binary data into a variable and compare it directly with your reference hex value.for eg if the data pins are connected to port P1...ADCval = P1;if (REFval == ADCval){....}