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OLIMEX© 2017
A20-OLinuXino-LIME2 user's manual
The SY6280 responsible for the USB_OTG is enabled by USB0-DRV (processor pin C12, port B9), thus
the USB_OTG is also controlled by the same signal.
Please note that the USB0-DRV (PC17, processor pin F23) also goes to the AXP209!
The connector case is also grounded.
We have configured an Android image with settings suitable for A20-OLinuXino-LIME2. You can upload
it to the board with PhoenixSuit software via the USB-OTG. The image is available for users to try and
tweak the settings. The images can be downloaded from the wiki article at:
https://www.olimex.com/wiki/A20-OLinuXino-LIME2
The board variant without NAND needs an SD card with bootable OS – Android or Linux. There are
ready images available for download at the above-linked A20 wiki article.
To repair the image on NAND re-upload it following these easy steps:
1. Install and run PhoenixSuit (can be found in the wiki article of the board).
2. Go to firmware tab of the program and point to a valid Android image (the latest official one may also
be downloaded from the wiki article).
3. Disconnect the power supply and USB cable from the A20 board.
4. Press and hold RECOVERY button, apply power supply 5V, release RECOVERY button.
5. Connect USB cable to the mini USB connector
6. You will be asked for drivers for the bootloader. Navigate to the folder where you extracted the
PhoenixSuit and install the drivers from the respective executables (or manually point the installer to the
drivers folder in the PhoenixSuit installation path).
7. PhoenixSuit will detect the board and would ask for the method of writing the image. Choose method
of writing the image and confirm your wish to write the image.
8. Wait till upgrade succeeds.
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