Installing System to eMMC

We can directly install the Android system into the eMMC module. Please refer to the Installing System to microSD Card section. This article mainly describes how to install the Android system in update format to the ROCK 4A/4B/4A+/4B+/4SE eMMC via Maskrom mode.

File Downloads

Download the ROCK 4A/4B/4SE system images from the resource download page.

Entering Maskrom Mode

With onboard eMMC

1. Remove the microSD card and disconnect the power
2. If there is an SPI Nor Flash on the board, short the SPI Nor Flash pins
3. Connect to the PC host using a USB-A to USB-A cable from the OTG port
4. Press and hold the Maskrom button
5. Connect the power cable while holding the button, then release the Maskrom button. If the power LED stays solid green, you've successfully entered Maskrom mode

Without onboard eMMC

1. Remove the microSD card and disconnect the power
2. If there is an SPI Nor Flash on the board, short the SPI Nor Flash pins
3. Connect to the PC host using a USB-A to USB-A cable from the OTG port
4. Connect the power cable. If the power LED stays solid green, you've successfully entered Maskrom mode
5. Insert the eMMC module

Installing the System

MacOS/Linux

• Please download and extract the following file to install the upgrade_tool:
• upgrade_tool v2.1


• Confirm that the Radxa ROCK 4AB SE has entered Maskrom mode



$ sudo upgrade_tool ld
Program Log will save in the /root/upgrade_tool/log/
List of rockusb connected(1)
DevNo=1	Vid=0x2207,Pid=0x330c,LocationID=19	Mode=Maskrom

• Flash the update system image



$ sudo upgrade_tool uf rock4xx-android-xx-update.img

• The system will automatically boot after flashing is complete

Windows

• Download and extract the following files to install RKDevTool:
• RKDevTool v2.96 (includes Chinese documentation)
• DriverAssitant v5.14


• Select "Upgrade Firmware"
• Click "Firmware" to select the Android Image in update format
• Click "Upgrade"
• The system will automatically boot after flashing is complete