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Clearing eMMC

Enter to Maskrom Mode​

What is Maskrom mode?

Maskrom mode, also known as Loader mode, is a special boot mode typically used for recovering or repairing problematic devices. This mode allows users to interact directly with the device's hardware without needing the operating system. In Maskrom mode, users can communicate with the device via a computer or other interface and execute a series of commands to resolve issues with the device.

On MacOS:

Results after executing lsusb: Output:Bus 000 Device 004: ID 2207:350b Fuzhou Rockchip Electronics Co., Ltd. Composite Device

On Linux:

Results after executing lsusb: Output:Bus 001 Device 030: ID 2207:350b Fuzhou Rockchip Electronics Company

On Windows:

Open RKDevTool, and you will see the device status as "Found One MASKROM Device."

How to Enter Maskrom Mode​

  • Insert a USB A-A cable into the USB 3.0 Type-A port on the ROCK 2A, and connect the other end to your computer.
  • Hold down the Maskrom button
  • Power on the device (insert a USB A-C cable into the Type-C Power port on the ROCK 2A, and connect the other end to the power source).
  • At this point, the device should normally enter Maskrom mode.

MaskRom Key

Clear eMMC​

  1. Generate zero.img

    dd if=/dev/zero of=./zero.img bs=1M count=64

  2. Make sure the host recognises Maskrom

    sudo rkdeveloptool ld
    DevNo=1	Vid=0x2207,Pid=0x350a,LocationID=109	Maskrom

  3. Flash Loader

Download the loader file  Loader , then installll the downloaded loader file (replace xxx_loader.bin with the downloaded file name in the following command)
sudo rkdeveloptool db xxx_loader.bin
  1. Erase eMMC
sudo rkdeveloptool wl 0 zero.img
  1. Reboot
sudo rkdeveloptool rd