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https://olimex.wordpress.com/2016/05/24/a20-can-new-oshw-board-designed-with-kicad-adds-can-networking-to-a20-olinuxino-and-a20-som/
A20-CAN - new OSHW board designed with KiCAD adds CAN networking to A20-OLinuXino and A20-SOM