Microcontroller Programming

8

Input/Output (I/O) Ports

“We have two ears and one mouth so that we can listen twice as much as we speak.”

—Epictetus (Greek Stoic philosopher)

OUTLINE

8.1    Introduction

8.2    Data Transfer Mode

8.3    Port A

8.4    Port B

8.5    Port C

8.6    Port D and Port E

8.7    I/O with Handshaking

8.8    A Project using Port B

8.9    Summary

OBJECTIVES

Upon completion of this chapter, you should be able to

1.  Understand the basic concept of programmed input/output ports.

2.  Understand the pin assignments of Port A to Port E.

3.  Write code to output data onto the Port B pins.

4.  Understand the concept of the data direction register.

5.  Understand the operation and pin assignments of Port C.

6.  Program the data direction of the Port ...