Embedded Computing and Mechatronics with the PIC32 Microcontroller

Chapter 7

Digital Input and Output

Abstract

This chapter covers digital inputs and outputs on the PIC32, including open-drain outputs and change-notification digital inputs that generate interrupts when the input transitions from low to high or vice-versa. The chapter describes the special function registers (SFRs) that control the digital input and output peripherals. Sample code is given that implements a change notification interrupt and that configures some pins as digital inputs, some as analog inputs, some as digital outputs, and some as open-drain digital outputs.

Keywords

Digital input

Digital output

Change notification interrupt

Open drain

Digital inputs and outputs (DIO) are the simplest interfaces between the PIC32 and other electronics, ...