Xunlong Orange Pi Mini

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Xunlong Orange Pi Mini
Xunlong Orangepi mini.png
Manufacturer OrangePi
Dimensions 94mm x 59mm
Release Date November 2014
Website Orange Pi Mini Product Page
SoC A20 @ 1Ghz
DRAM 1GiB DDR3 @ 960MHz
NAND no nand available
Power DC 5V @ 2A (best via DC input)
Video HDMI (Type A - full), CVBS, RGB/LVDS
Audio 3.5 mm jack, PHOUT
Network 10/100/1000Mbps Ethernet (Realtek RTL8211E), wifi 802.11 b/g/n
Storage SD, SATA (with power connector: JST XH 2.5mm header, providing +5V)
USB 2 USB2.0 Host, 1 USB2.0 OTG
Other CIR
Headers 1 pin UART, 3 pin UART, LCD/ LVDS, CSI, 40 pin GPIO

Orange Pi Mini is A20-based development board produced by Xunlong. Feature-wise, the Orange Pi Mini is rather similar to the original Orange Pi, but it lacks the VGA output and onboard optional flash, and it has only 2 USB ports. Instead of two 26 + 18 pin expansion ports, the board has a single 40 pin expansion port.


The PCB has the following silkscreened on it:

Orange Pi Mini

Sunxi support

Current status


Note: Orange Pi Mini's GMAC is not supported in the community kernel. A commit within Orange Pi Github fork of linux-sunxi-3.4 seems to provide GMAC support for Orange Pi Mini. This has to be proved and merged into linux-sunxi.

Xunlong seems to use an important tweak of both the Linux 3.4 kernel and U-Boot networking code for the Orange Pi Mini: The GMAC driver is specifically modified to set the GMAC_TX_DELAY parameter to 3. This adjusts the relative timing of the clock and data signals to the PHY in order to compensate for differing trace lengths on the PCB (details; the pcDuino3 Nano has the same problem). Without this modification, the Ethernet port will work at 100Mbit, but not (or not reliably) at 1000Mbit. Upstream U-Boot now sets this parameter itself, so the kernel patch isn't needed any more (patch).




Manual build

  • For building u-boot, use the Orangepi_mini target (make orangepimini_config).
  • The .fex file can be found in sunxi-boards as orangepimini.fex

Everything else is the same as the manual build howto.

Mainline kernel

Use the sun7i-a20-orangepi-mini.dtb device-tree file for the mainline kernel

Expansion Port

The Orange Pi Mini has a 40-pin, 0.1" connector with several low-speed interfaces.

2x20 Header
1 3.3V 2 5V
3 PB21 TWI2-SDA 4 5V
11 PI19 UART2_RX 12 PH2
13 PI18 UART2_TX 14 GND
15 PI17 UART2_CTS 16 PH20 CAN_TX
17 3.3V 18 PH21 CAN_RX
19 PI12 SPI0_MOSI 20 GND
23 PI11 SPI0_CLK 24 PI10 SPI0_CS0
25 GND 26 PI14 SPI0_CS1
27 PB5 I2S_MCLK 28 PI12
29 PB6 I2S_BCLK 30 GND
31 PB7 I2S_LRCK 32 PI20 UART7_TX
33 PB8 I2S_DO0 34 GND
35 PB12 I2S_DI 36 PI21 UART7_RX
37 PB13 SDPIF_D0 38 PH3
39 GND 40 PH5

Tips, Tricks, Caveats

FEL mode

The button marked SW3, located beside the wifi module, triggers FEL mode when pressed during boot. (SW3 pulls the A20 BOOTSEL pin to low level.)

If no SD card is present, the A20 will automatically fall back to FEL mode (as this device has no other means of booting, like e.g. onboard NAND flash). So if you want to enforce FEL mode, you may simply remove the SD card and connect to the Orange Pi Mini via the DC input(the one next to the TF card slot upside). This also supplies power to the board at the same time.

To verify you have successfully entered FEL mode, check the output of fel version. For the Orange Pi Mini, it should look like:

AWUSBFEX soc=00001651(A20) 00000001 ver=0001 44 08 scratchpad=00007e00 00000000 00000000


For those with a transparent case (or no case at all) the Orange Pi Mini's LED activity is good. The red power LED (D2) can be turned off.


If you wish to connect a SATA drive (2.5" mobile harddisk or SSD) to the Orange Pi Mini: Make sure your power supply is connected to the "DC-IN" port, and can deliver sufficient current (e.g. 5V/2000mA). Using the OTG port or an inadequate power supply might result in your SATA device not being detected.

Adding a serial port

TODO: The section is mostly a copy&paste from the "Banana Pi" page. Some of it may be incorrect, or might not apply to this device. Please review / rework the information, and remove this reminder when done.

While the GPIO pinout of the Orange Pi Mini is designed to be compatible to the Raspberry Pi, it's important to notice subtle differences in the serial ports. The Orange Pi Mini has some additional pins that already provide two more serial ports.

The default serial port /dev/ttyS0, used for (bootstrap) debugging and the serial console, is located at J11 - refer to the picture and instructions below. The Raspberry's "original" serial port on GPIO 14 and 15 (CON3, pins 8 and 10) can usually be accessed as /dev/ttyS2 on the Orange Pi Mini. J12 also provides another serial port on pins 4 (RXD) and 6 (TXD), which should map to /dev/ttyS3.

Note: The actual mapping between physical pins, UART numbers and/or device names may depend on the specific kernel and configuration used. If in doubt, check the boot messages: dmesg | grep -i uart

UART pads

Locating the UART

The UART pins are located in the upper right corner of the board. They are marked as TXD, RXD and GND on the PCB. Just attach some leads according to our UART Howto.



  • The original Orange Pi was released in November 2014. The orange pi features a standard TF card slot and a 26 pin GPIO connector (similar to the Raspberry Pi A/B).

Also known as

See also

There are several websites about Orange Pi Mini and claiming to support it. It has to be clarified, what is "official" and who is behind this sites.

Manufacturer images

A various amount of prebuilt images is provided via OrangePi's Website.