The U3 IO Shield is designed to be mounted to the U3 via spacers and connected via the 8 pin GPIO connector on the U3. It is meant as a development board to allow the U3 to interact with its surroundings.
KEY FEATURES
36 pins for GPIO/PWM/ADC
Same footprint as the U3
Versatile, general-purpose data acquisition and control module
Direct connection to U3 via 8-pin GPIO connector
Relatively large prototyping area
GPIO/ADC/PWM and power pins on 0.1" strips
Two 3-pin headers for small servo applications
Access the HW SPI of Exynos-4412 CPU (compatible with U3 PCB revision 0.5)
SPI Flash memory SST25WF020A
Additional 10-pin connector for I2C/GPIO expansion
INCLUDES
U3 IO shield board (U3 not included)
4x 20mm PCB spacer (plastic)
4x 11mm PCB spacer (metal) - Must be used between the U3 and IO Shield for proper grounding