Interfacing External Peripherals to the 8051
IN THIS CHAPTER, YOU WILL LEARN
- How to use external interfaces like keyboards, LCDs, LEDs, ADCs, DACs and motors as interfaces to 8051
- The necessity of using external chips for motor interfacing
- The principle used in DC motor control
21.1 | Interfacing ADCs and DACs to 8051
21.1.1 | Interfacing an Analog to Digital Converter to 8051
Our interest is to interface an ADC to an 8051 MCU using Port 2 as the data lines, and some pins of Port 1 for the control signals needed by the ADC. When an analog voltage is given as an input to an ADC, it gets converted to a digital number that is transferred to the 8051. The digital value can be stored in the RAM of the system and may be displayed or used ...