A20-SOM-EVB is reference design on 2 layer board for A20-SOM which adds VGA, HDMI, Audio In/Out, LCD, 2 Mpix Camera, Gigabit Ethernet, SATA, USB-OTG and 2 USB hosts is available with Eagle CAD files, so everyone can modify and tailor to his needs.
A20-SOM(-4GB) matching connectors
VGA output with a connector
HDMI output with a connector
LCD output on a row-of-pins
Gigabit interface with a connector
Camera 2 Mpix
SATA connector and SATA power connector
USB-OTG with power control and current limiter
LiPo Battery connector with battery-charging capabilities
Mic input and headphones out with connectors
Android 7 buttons
UART0 connector for console debug
5 GPIO connectors x40 pin 0.1"
4 x M3 x 8mm screws and 4 x M3 x 6mm metal spacers
Dimensions of the SOM part: (3200 x 2200)mil ~ (55.88 x 81.28)mm
Dimensions of the EVB part: (5300 x 4050)mil ~ (134.62 x 102.87)mm
Instructions, demo software, customer projects and more might be found at the wiki page:A20-SOM-EVB wiki page
The peripherals provided by A20-SOM-EVB are supported in the official images available for A20-SOM in its wiki article: A20-SOM wiki article
How do I remove the A20-SOM main board from the A20-SOM-EVB peripheral board? It looks like a very tight fit.
Try to use a thin and long object as a lever. Carefully place it on a spot that won't damage other components. Push each side slowly up before attempting to pull out the A20-SOM from the A20-SOM-EVB's connectors. Never try to remove the whole side in one go! Doing so would most likely damage the connectors and the male pins! Always try to symetrically push up the A20-SOM frm the EVB.