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Flash code | Description |
2 | Unspecified error |
3 | Network recovery script is preparing to run on a device configured for network recovery. |
4 | No upgrade file found. |
5 | Failed to load kernel module. |
6 | Board is not capable of running the current firmware version. |
7 | A piece of on-board hardware is not working correctly. |
8 | Problem related to the storage device (either the USB drive or microSD card) |
9 | Problem related to the registry/NAND |
10 | The autorun script encountered a load/run error. |
11 | WiFi-related error |
12 | Unable to find a bootable image. |
On-Board Switch
The on-board switch is connected to a GPIO12 pin that is pulled low when the service (SVC) button is pressed. Conversely, a pull-up on the button normally sets the GPIO12 pin to be pulled high.
Reset Switch/GPIO Button
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Service Button
The Service (SVC) button operates as an additional GPIO button (GPIO12) in system software. Pressing the SVC button pulls the pin low. Conversely, releasing the button normally pulls the pin high.
Reset Button
The Reset button is connected to the reset circuit. Pressing down the reset Reset button will send an initial signal to the system software, and holding the reset button low for approximately 4 seconds will cause a hard reset.
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