Micro HDMI Interface

The Radxa Cubie A7A features one onboard HDMI port for video output, supporting up to 4K@60fps resolution.

Interface Location

For the specific location of the HDMI interface, please refer to the interface description section in the Hardware Interface tutorial!

Usage Guide

Connect a display to the Cubie A7A's HDMI port to test the video output.

tip

Some displays may have compatibility issues. If you encounter problems, try using a different display for testing.

Display Configuration

This section explains how to modify display resolution through both graphical interface and command line.

Graphical Interface

You can use the system's built-in display settings to modify the display resolution.

① : Select Applications to enter the system applications interface

② : Select Settings to access system settings

③ : Select Display to enter the display settings interface

④ : Select Resolution to modify the display resolution

⑤ : Select Scale to adjust the display scaling

⑥ : Select Apply to confirm and apply the display settings

Command Line

You can use the command line to modify display settings.

• xrandr Tool

xrandr is a command-line tool in Linux for configuring displays, primarily used to adjust screen resolution, refresh rate, rotation, and multi-display layouts.

• View Current Display Configuration

Running xrandr (without parameters) lists all connected display devices (such as HDMI-1, DP-1, etc.) along with their supported resolutions and refresh rates.

radxa@device$

xrandr

Example terminal output showing current display configuration:

radxa@device$

Screen 0: minimum 320 x 200, current 3840 x 2160, maximum 16384 x 16384
HDMI-1 connected primary 3840x2160+0+0 (normal left inverted right x axis y axis) 597mm x 336mm
   3840x2160     60.00*+  60.00    50.00    59.94    30.00    25.00    24.00    29.97    23.98  
   1920x2160     60.00  
   2560x1440     59.95  
   2048x1152     60.00  
   1920x1200     59.95  
   1920x1080     60.00    60.00    50.00    59.94  
   1920x1080i    60.00    59.94  
   1680x1050     59.88  
   1600x900      60.00  
   1440x900      59.90  
   1280x800      59.91  
   1280x720      60.00    50.00    59.94  
   1024x768      60.00  
   800x600       60.32  
   720x576       50.00  
   720x480       60.00    59.94  
   640x480       60.00    59.94

• Set Display Resolution and Refresh Rate

Set HDMI-1 resolution to 1920x1080 with a refresh rate of 60Hz:

radxa@device$

xrandr --output HDMI-1 --mode 1920x1080 --rate 60

Interface Specifications

Technical Reference

For complete technical specifications and pin definitions, please refer to the Hardware Design: Schematic document in the download section.