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I have connected my adc0808 with at89c52 via 2 D flipflops… I wanted to provide the Vref voltage as an input to the adc . I have connected a pot to the Vref so that I can change the Vref value. I wanted to know what changes i have to make in the program and which channels to select?I have programmed in asm
Vref is just a referance voltage… is i make Vref as 3 volt then my adc will calibarated b/w 0 to 3 volt…
you canuse any channel… just go to the links:how to use adc 0808…
http://www.engineersgarage.com/microcontroller/8051projects/interface-LDR-ADC0808-interrupt-clock-AT89C51-circuit
might be helpful for you since you wanted top design asm code…
http://www.engineersgarage.com/forums/8051/c-code-assembly-code
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