The x86 Microprocessors: 8086 to Pentium, Multicores, Atom and the 8051 Microcontroller, 2nd Edition

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 ...