10

Peripheral Interfacing—II

IN THIS CHAPTER, YOU WILL LEARN

  • The architecture and programming features of the timer chip 8253/8254.
  • The method of generating waveforms of dif­ferent frequencies using this chip.
  • The use of the different modes of operation of the timer chip.
  • The use of a dedicated chip 8279 for keyboard and display interfacing.
  • The connections between the 8279 and the display circuits.
  • How to use this chip in a circuit with a keyboard and a display.
  • How interrupts are managed by the program­mable interrupt controller chip 8259.
  • The use of initialization and operational control words of 8259.
  • The method of changing the priority settings using this chip.
  • The use of 8259 in PCs.

Introduction

In Chapter 9, we used the parallel ...

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