# Rongpin King3399 ## Installing Armbian on eMMC This guide describes how to install Armbian onto the internal eMMC. ### What you will need? 1. PC on Windows. This is the only way we verify to be working. 2. USB-C to USB-A cable. C-to-C cable might work as well. 3. 12V 2A power adapter with a barrel plug connector. ### Downloading Armbian King3399 is not officially supported by Armbian. Ophub is a project dedicated to providing mainline Armbian for unsupported platforms such as TV boxes and development boards. 1. Find the latest Armbian release on @[https://github.com/ophub/amlogic-s9xxx-armbian/releases](https://github.com/ophub/amlogic-s9xxx-armbian/releases) 2. In Release’s Assets, download a build for `king3399` platform – it should be in the file name. 3. Decompress a downloaded `.img.gz` file. 4. Perfect! Now you have an `Armbian_xx.xx.x_rockchip_king3399_xxx.img` file suitable for flashing. ### Installing driver and flash utility Install driver for Rockchip USB bootloader. [DriverAssitant v5.1.1.zip 9786360](https://storage.yandexcloud.net/bksp-wiki-assets/uploads/298a2e26-87de-4753-a045-717271c8b2f5/7668d2db-b275-498d-b323-b6468bba8293/DriverAssitant%20v5.1.1.zip?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=YCAJEMO2-DwUmfLoAY9UdwOXD%2F20260911%2Fru-central1-a%2Fs3%2Faws4_request&X-Amz-Date=20260911T130000Z&X-Amz-Expires=86400&X-Amz-Signature=9979762c1df0b2bae0ad5050cd9b76bc07d06fde78040939c97ee0b6d0db6826&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject) Download and extract RKDevTool. This archive already includes the configuration file and loader binary. [RKDevTool v2.86 (BKSP).zip 2712931](https://storage.yandexcloud.net/bksp-wiki-assets/uploads/298a2e26-87de-4753-a045-717271c8b2f5/509f7279-39cb-4773-9dc0-66ec738cfbd3/RKDevTool%20v2.86%20%28BKSP%29.zip?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=YCAJEMO2-DwUmfLoAY9UdwOXD%2F20260911%2Fru-central1-a%2Fs3%2Faws4_request&X-Amz-Date=20260911T130000Z&X-Amz-Expires=86400&X-Amz-Signature=0258789b36196581af5ea05ab77fc76d96145e96376102516dae360731aa599c&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject) ### Preparing a flash utility Open RKDevTool. You should see exactly the same configuration: ![](https://storage.yandexcloud.net/bksp-wiki-assets/uploads/298a2e26-87de-4753-a045-717271c8b2f5/e877255e-7b64-404f-8004-969bebe0a599/image.png?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=YCAJEMO2-DwUmfLoAY9UdwOXD%2F20260911%2Fru-central1-a%2Fs3%2Faws4_request&X-Amz-Date=20260911T130000Z&X-Amz-Expires=86400&X-Amz-Signature=4b3e9878187d7e25175498cd4ca4e958649d64482ee23061ec64f077458b7c88&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject " =901x455") Make sure that: * Both rows are ☑️ Checked. * Addresses matches the screenshot. * Names matches the screenshot. * Write by Address is ☑️ Checked (marker #3 on the screenshot). * DevTool properly detected the loader file. If not, click on an empty cell next to “Path” (marker #1), then select `rk3399_loader_v1.27.126.bin` file from RKDevTool’s `Image` directory. * Click on Row #2 empty cell (marker #2), and select the Armbian image you downloaded. ### Booting into MASKROM Connect the board USB-C connector to USB-A on your PC. Plug the 12V power adapter. ![](https://storage.yandexcloud.net/bksp-wiki-assets/uploads/298a2e26-87de-4753-a045-717271c8b2f5/8e9663fe-2cea-4312-9c2d-844878f843a1/image.png?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=YCAJEMO2-DwUmfLoAY9UdwOXD%2F20260911%2Fru-central1-a%2Fs3%2Faws4_request&X-Amz-Date=20260911T130000Z&X-Amz-Expires=86400&X-Amz-Signature=d6bb2d1bbaaff461e7559ca52cbe75744b076eda3b4140bd8811f2545fe1813b&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject " =856x425") Now it’s time to go MASKROM mode: 1. Press and hold “USB Boot” button. 2. While holding “USB Boot”, press “Reset” button for **2** seconds. 3. Release “Reset”, and hold “USB Boot” for **10** seconds. RKDevTool must now report “Found One MASKROM Device”: ![](https://storage.yandexcloud.net/bksp-wiki-assets/uploads/298a2e26-87de-4753-a045-717271c8b2f5/09764d56-2992-4d9f-8efb-299a13938256/image.png?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=YCAJEMO2-DwUmfLoAY9UdwOXD%2F20260911%2Fru-central1-a%2Fs3%2Faws4_request&X-Amz-Date=20260911T130000Z&X-Amz-Expires=86400&X-Amz-Signature=49bb8919dc161f4acae33b5c68a904dfd8854752eb1931ed5056b3c323186207&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject " =901x455") #### Troubleshooting * **Device goes to FLASHROM rather than MASKROM mode** – remove the power plug, wait for a few seconds, then plug the power and try again. * **Device disconnects abruptly** – use another USB cable, restart RKDevTool, power cycle the board. * **Nothing happens after I perform the button flow** – power cycle the board. ### Flashing Now it’s time to finally press “Run” and hope for the best. When flashing is done, board should reboot automatically. ### Additional Resources * [https://github.com/ophub/amlogic-s9xxx-armbian/issues/1562](https://github.com/ophub/amlogic-s9xxx-armbian/issues/1562https://github.com/ophub/u-boot/tree/main/u-boot/rockchip/king3399) * [https://github.com/ophub/u-boot/tree/main/u-boot/rockchip/king3399](https://github.com/ophub/amlogic-s9xxx-armbian/issues/1562https://github.com/ophub/u-boot/tree/main/u-boot/rockchip/king3399) * * * ## RTC RTC is inside RK808 PMIC. Battery is CR1220. ## WWAN slot Onboard mPCIe slot is USB-only. RK3399 PCIe lanes aren’t exposed neither to the slot nor anywhere else on board. ## Microphone Note that there is a small microphone near the edge of the board. You probably would like to remove it before use. It’s through-hole, so removal is quite simple. ## Antennas * 2.4G – there is an onboard antenna. Not the best, but kinda usable. * 5G – you absolutely need an external antenna for that. --- **Documents** - [BKSP 101](https://wiki.bksp.in/s/public/doc/bksp-101-HvrtlzB32F) - [Проекты](https://wiki.bksp.in/s/public/doc/proekty-yjWZscgTvo) - [Infrastructure](https://wiki.bksp.in/s/public/doc/infrastructure-VPKsJwVSVh) - [Пространство](https://wiki.bksp.in/s/public/doc/prostranstvo-UF1eSbQDi5) - [Equipment](https://wiki.bksp.in/s/public/doc/equipment-t5MYAVJ8l0) - [Other](https://wiki.bksp.in/s/public/doc/other-uPW1YJQaRt)