AIO-3399J Buy Specs

Uses RK3399 Six-Core ( A72x2+A53x4 ) 64-Bit CPU, up to 2.0Ghz , integrated Quad-Core Mali-T864 GPU. Onboard M.2 PCIe, 4G LTE interface, multiple display interface and serial port. Support Android/Linux/Ubuntu system.

MaskRon

Update time：2018-01-29 Views：4402

Introduction

MaskRom mode is the bottom line preventing the device from bricking. Enforcing device into MaskRom mode involves hardware operation, which is risky. Therefore, please try to put the device into Loader mode, or boot the device with sd-card, before risking MaskRom mode.

Please read and operate with great care!

AIO-3399J enter MaskRom mode

principle：
Artificial to the Flash data pin connected to ground, the system will think Flash data error, so clearing the Flash data.
1.Locate test point which are on the RK3399 Core Board, as following red box section show:

主图1.jpg




2. Power down the device.
3. Plug out SD card.
4. Use a micro USB Type-C cable to connnect device and host pc.
5. Use metal tweezers to keep TP31 and TP32 connected.
6. Power on the board.
7. Wait a moment, then release the metal tweezers.
Device should enter MaskRom mode:

maskrom_AndroidTool

Please check Boot Mode for more detail of MaskRom mode.