A20-SOM is System on Chip module, which contains A20 Dual Core Cortex-A7 processor, Power managment Unit AXP209, 1GB DDR3 memory and optional 4GB NAND Flash. All A20 signals are available on 6 connectors x 40 pin with 0.05" step. A20-SOM have UART console connector and SD-card.
Reference design for A20-EVB with VGA, HDMI, Audio In/Out, 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. Templates for A20-SOM receiptacle done in Eagle and KiCAD are available.
T2 is a pin-to-pin compatible SOC from Allwinner designed for Automotive applications. T2 operating temperature is -40+85C. T2-SOM version is with all components operating in temperature -40+85C including SOC, DDR3 memory.
Allwinner A20 dual core Cortex-A7 processor, each core typically running at 1GHz
1GB DDR3 memory
8GB NAND flash memory option (only in A20-SOM-n8GB)
Industrial version available (T2-SOM-IND)
AXP209 PMU IC
RESET, RECOVERY buttons
6 connectors x 40 pin 0.05" step
Dimensions: (3200 x 2200)mil ~ (81.28 x 55.88)mm
Ambient temperature: (0-70)°C for A20-SOM, A20-SOM-n4GB, A20-SOM-n8GB
outdated 20 wiki article - image links, instructions, demo software, customer projects and more might be found at the wiki page
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.