Interfacing adc0808 with 8051 microcontroller tutorial circuit diagram and code. Web this circuit demonstrates the principle and operation of interfacing a simple adc 0804 using 8051 microcontroller (at89c51 ). Web the pin out diagram of adc0804 is shown in the figure below. Web according to the adc0804 start conversion timing diagram (figure 2), it can be seen that the adc0804 starts the conversion through the following series of. Nsc, alldatasheet, datasheet, datasheet search site for electronic.