9

Peripheral Interfacing—I

IN THIS CHAPTER, YOU WILL LEARN

  • The necessity of using dedicated hardware for peripheral interfacing.
  • The architecture and programming features of the chip 8255.
  • The method of interfacing an ADC to the 8086.
  • The methods of generating different wave­forms using a DAC.
  • The way in which an LCD can be used to display ASCII characters.
  • The principle of the stepper motor and how it is controlled by the CPU.
  • Hex keyboard interfacing to the 8086.
  • The interfacing of dynamic multiplexed LEDs with the 8086.
  • That in all the above cases the 8255 is used as the parallel interface controller.

Introduction

In Chapter 6, we made a study of the hardware features of 8086. In Chapter 7, the ­methods by which memory and ports are ...

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