====== Introduction ======
**The XU4 is fully software compatible with XU3!** \\
However, the XU4 is more compact, more affordable and more expandable.

{{http://dn.odroid.com/homebackup//201506171531272562.jpg|}}

====== XU4 PCB revision history ======

|LOT-ID| PCB Revision| Description|
|EL-1507| rev0.1 20150527 |The first production version |
|EL-1510| rev0.1 20150825 | Add a R99 of Pull-Down resistor on the PMIC PSHOLD signal.\\ Add a C289 of dummy capacitor for physical balancing the heatsink on the PCB|
|EL-1511| rev0.1 20150825 | ::: |
|EL-1601| rev0.1 20150825 | ::: |
|EL-1603| rev0.1 20151201 | Added a pull-up Resistor on a UART RXD PIN.\\Added a 100uF capacitor on DC JACK.|
|EL-1606| rev0.1 20151201 |RILIM of NCP380 is changed to 6.49kΩ and USB current limits at 2A.|


**We did not change the PCB revision because any key features were not changed nor added.**
====== Hardware and Peripherals ======
  * [[xu4_hardware|Hardware information]]
  * [[http://forum.odroid.com/viewtopic.php?f=97&t=26243|XU4 PCB 3D Model by hominoid]]
  * [[xu4_bootmode_configuration|Boot Mode Configuration]]
  * [[xu4_hdmiphy_configuration|HDMI PHY Configuration]]
  * [[howto_install_heatsink_xu4| How to install a 40X40-25mm heatsink]]
  * [[en:xu4_benchmark_xu4_xu4q| Benchmark of XU4 with Active Cooler and XU4Q with Passive Cooler]]
  * [[en:xu4_ram_overclock| DDR Overclocking on XU4]]
  * **[[http://forum.odroid.com/viewtopic.php?f=95&t=15302#p99467|How to fix the USB 3.0 ports contact issue]]**
  * **[[http://forum.odroid.com/viewtopic.php?f=97&t=15252&p=99125#p99125|Low noise cooler options]]**
  * **[[http://forum.odroid.com/viewtopic.php?f=97&t=14988#p139030|Lower the in-rush current for battery powered XU4 by dronus]]**
  * [[en:c2_lirc_gpio_blaster| Support GPIO based IR Blaster]]

====== Software Platform ======
  * [[XU3_Partition_Table|Partition Table]]
  * [[XU3_Building_u-boot|U-boot]]
  * [[XU3_Building_kernel|Linux]]
  * [[XU3_Building_android|Android]]
  * [[xu4_upgrade_from_3.10_to_4.9|Ubuntu Kernel update from 3.10 to 4.9]]
  * [[en:xu4_kodi_fbdev|Kodi on FBDEV]]
  * [[XU3_Tips|Tips for ODROID-XU3]]
  * [[XU4_Tips|Tips for ODROID-XU4]]
  * [[en:nfsboot | Boot Linux over NFS ]]
  * [[http://forum.odroid.com/viewtopic.php?f=99&t=25708|TFTP + NFS boot]]
  * [[en:xu4_xen|Virtualization using Xen on ODROID-XU3/4]]
  * [[en:odroid_linux_performance_counter| Performance Counter (PMU) on Linux ]]
   * [[en:xu4_led_control| How to control blue LED on Linux]]
  * [[en:xu4_WLAN_AP|WiFi Soft AP ]]
  * [[en:minimal_image_wifi_setup|Configure Wireless using wpa_supplicant on minimal image or command line]] 
  * [[XU3_FAQ|FAQ]]

====== Expansion IO and Accessories ======
  * [[XU3_Enhancement_GPIO30|30pin GPIO Ports ]]
    * [[en:xu3_hardware_gpio|GPIO Map for WiringPi Library]]
    * [[en:xu3_gpio_register|GPIO Port register MAP and C-code example]]
    * [[en:xu3_hardware_i2c|I2C with Expansion board]]
    * [[en:xu3_hardware_spi|SPI]]
    * [[en:xu3_hardware_uart|UART]]
    * [[en:xu3_hardware_adc|ADC]]
    * [[en:xu3_hardware_irq|GPIO IRQ]]
    * [[en:xu4_hardware_1wire|1-Wire]]
  * [[XU3_Enhancement_GPIO12|12pin GPIO Ports ]]
    * [[en:xu4_hardware_gpio|GPIO Map]]
    * [[en:xu4_hardware_hsi2c|HSI2C]]
  * [[XU3_ExpansionBoard|Using the Expansion Board]]
  * [[en:xu3_weather_board|Using the temperature & humidity sensor with H/W I2C]]
  * [[en:xu4_shift_shield|XU4 Shifter Shield Board & GPIO Map]]
    * [[en:tinkering_kit_light_level_meter_with_driver | Basic GPIO/ADC access with WiringPi C code and Python]]
    * [[en:16x2_lcd_io_shield | Using the 16x2 LCD IO shield with the WiringPi]]
    * [[en:spi_dot_matrix | Using the SPI Dot-Matrix]]
    * [[en:spi_lcdshiled | Using the 3.2inch TFT+Touchscreen Shield]]
    * [[en:3.5inch_lcd_shield | Using the 3.5inch TFT+Touchscreen Shield]]
  * [[en:xu4_cloudshell|CloudShell]]
  * [[en:xu4_cloudshell2|CloudShell2]]
  * [[en:gpiomem|Rootless GPIO access: /dev/gpiomem]]
==== Android ====
  * [[c2_app_launch_via_gpio_on_android|App launch via GPIO on Android]]
====== Software(OS) Release ======
Please read [[ODROID_Flashing_Tools|**THIS**]] once before you start to download and flashing S/W release on your ODROID device.
  * [[XU3_release_linux_ubuntu_k49|Linux/Ubuntu Kernel 4.9]]
  * [[XU3_release_android|Android]]
  * [[XU3_release_linux_ubuntu|Linux/Ubuntu]]

====== Other Operating Systems (Unofficial and Official) ======
   * [[http://forum.odroid.com/viewtopic.php?f=94&t=23911|Android 7.1 Nougat CM-14.1]] 
   * [[http://forum.odroid.com/viewtopic.php?f=94&t=9316|Android 5.1.1 Lollipop CM-12.1]] 
   * [[http://forum.odroid.com/viewtopic.php?f=96&t=17542|Debian Jessie]]  
   * [[http://forum.odroid.com/viewtopic.php?f=98&t=7322|GameStation Turbo with XBMC(based on Debian Wheezy/Jessie)]]     
   * [[http://forum.odroid.com/viewtopic.php?f=98&t=14907|OpenMediaVault]] 
   * [[https://github.com/ARM-software/meta-mali|Yocto project with Mali GPU Recipes]]  
   * [[http://forum.odroid.com/viewtopic.php?f=95&t=15261|Ubuntu 14.04 LTS Server]] 
   * [[http://forum.odroid.com/viewtopic.php?f=94&t=15084|Android TV OS]] 
   * [[https://www.offensive-security.com/kali-linux-vmware-arm-image-download/|Kali Linux 2.0]] 
   * [[http://forum.odroid.com/viewtopic.php?f=98&t=15700|DietPi (Based on Debian Jessie)]]
   * [[http://www.lakka.tv/get/linux/odroidxu3/|Lakka RetroArch Game emulator]]
   * [[http://recalbox.remix.free.fr/|Recallbox.remix 5.0 for Game emulators (based on Buildroot Linux)]]