Boot mode description

Preface

The AIO-3288C is installed with the Android operating system by
default. If users want to run other operating systems, they need to
use the corresponding firmware to program to the motherboard.

AIO-3288C has a flexible startup mode. Generally, the AIO-3288C
development board does not brick unless the hardware is damaged.

If the accident appeared in the process of upgrading, bootloader
damage, leading to unable to upgrade again, while still can enter
"MaskRom" mode to repair.

Firmware information

Firmware update instructions

Firmware download link

Upgrade method

AIO-3288C supports firmware update through the following two methods:

Update firmware using USB cable  Use the USB cable to connect the
motherboard to the computer, and use the upgrade tool to program the
firmware to the motherboard.

Use MicroSD card  Use the upgrade card creation tool to make the
MicroSD card as an upgrade card, insert the upgrade card into the
motherboard, power on, and the machine will automatically perform the
upgrade.

boot media

eMMC interface

SDMMC interface

Boot mode

AIO-3288C has three startup modes:

Normal mode

Loader mode

MaskRom mode

Normal mode

Normal mode is the Normal startup process. Each component loads in
turn and enters the system normally.

Loader mode

In Loader mode, the bootloader will enter the upgrade state, waiting
for the host command for firmware upgrade, etc. To enter the Loader
mode, the bootloader must detect that the "RECOVERY" key has been
pressed and the USB is connected.

The method to put the device into upgrade mode is as follows:

Disconnect the power adapter and Dual male usb data cable:  1.Use Dual
male USB data cable to connect host and device together.  2.Press and
hold RECOVERY key.  3.Power on.  4.After around two seconds, release
RECOVERY key.

MaskRom mode

MaskRom mode is used for system repair when the bootloader is damaged.

Under normal circumstances, it is not necessary to enter MaskRom mode.
Only when the bootloader verification fails (IDR block cannot be read,
or the bootloader is damaged), the BootRom code will enter MaskRom
mode. At this time, the BootRom code waits for the host to transmit
the bootloader code through the USB interface, load and run it.

Forcibly enter MaskRom mode, please refer to the chapter MaskRom Mode.