DVK571 Cubietruck Cubieboard? 3 Expansion Developmen?t Board for Arduino Further Development

Cubietruck connector UART0 interface: for connecting serial debugging module Arduino connector: for connecting compatible Arduino boards and/or Arduino shields I2C interface: easily connects to I2C modules SPI interface: easily connects to SPI modules UART interface: easily connects to UART modules 5V/3.3 V power input/output: usually used as power output, also common-grounding with other user board Power indicator User LEDs: 3 red LEDs User keys: 3 user keys User LEDs jumper short the jumper to connect to I/Os used in example code open the jumper to connect to other custom pins via jumper wires User keys jumper short the jumper to connect to I/Os used in example code open the jumper to connect to other custom pins via jumper wires Arduino Port selection jumper: easily controlling the Arduino connection Arduino UART selection jumper short the right: while connecting Arduino UART shield short the left: while connecting Arduino microcontroller board Arduino AD selection jumper short the right: while connecting Arduino ADC shield short the left: while connecting Arduino I2C shield