• Overview
  • Device
  • Path of Device File
  • Types of Devices
  • Steps of Using Devices
• Digital I/O
  • Digital I/O Overview
  • Steps of Using Digital I/O
  • Opening Digital I/O
  • Setting Digital I/O
  • Using Digital I/O
• UART
  • Steps of Using UART
  • Opening UART
  • Setting UART
  • Getting Status of UART
  • Using UART
• NET
  • Steps of Using NET
  • Opening NET
  • Setting NET
  • Getting Status of NET
• TCP
  • Steps of Using TCP
  • Opening TCP
  • Setting TCP
    • How to Use SSL
    • How to Use Web Socket
  • TCP Connection
  • Getting Status of TCP
  • TCP Communication
• UDP
  • Steps of Using UDP
  • Opening UDP
  • Binding UDP
  • Setting UDP
  • Getting Status of UDP
  • UDP Communication
• ST
  • Steps of Using ST
  • Opening ST
  • Setting and Using ST
    • Common Commands
    • Free Mode
    • Toggle Mode
    • Pulse Mode
    • Toggle vs Pulse Mode
    • PWM Mode
    • Trigger
• HT
  • Steps of Using HT
  • Opening HT
  • Setting and Using HT
    • Common Commands
    • Toggle Mode
    • Pulse Mode
    • Toggle vs Pulse Mode
    • PWM Mode
    • Trigger and Output Modes
    • Capture Mode
    • Trigger and Capture Modes
• ADC
  • Steps of Using ADC
  • Opening ADC
  • Setting ADC Channel
  • Reading ADC Value
• SPI
  • Overview
  • Steps of Using SPI
  • Opening SPI
  • Setting and Using SPI
  • Examples of Using SPI
• I2C
  • Overview
  • Steps of Using I2C
  • Opening I2C
  • Setting and Using I2C
  • Examples of Using I2C
• RTC
  • Overview
  • Steps of Using RTC
  • Opening RTC
  • Setting RTC Time
  • Getting RTC Time
• Appendix
  • Device Related Functions
  • Device Information
  • F/W Specification
  • Revision History

Overview

Digital I/O can be used to monitor digital inputs or control digital outputs. This device is also used to connect LED indicators showing system status.

Digital I/O Structure

Every digital I/O port can have two different states which are High (or 1) and Low (or 0). Therefore, each port is matched to a binary digit as you can see below.