Domino Core is a low-cost, high-performance 802.11n Wi-Fi module based on Qualcomm/Atheros AR9331 WiSoC. Domino Core is a surface-mountable single-sided Wi-Fi-enabled Linux module, featuring the lowest power consumption in the industry. The Domino Core module exposes almost all the AR9331 WiSoC available signals to regular 2mm pitch castellated pads for both easy hand and automatic SMT soldering, including: USB 2.0 (host or slave) serial port (default to U-Boot / Linux console), 3 * 10/100MB Ethernet ports, SPI (MOSI, MISO, CLK, CS), I2S (CK, WS, SD, MCK, MICIN), SLIC, SPDIF Output, JTAG (TMS, TCK, TDI, TDO), 9 * LEDs (also used for bootstrap settings), up to 29 * GPIOs (multiplexed with other functions above). The Domino core module only requires a single 3.3V power supply, with a maximum power consumption of 0.5W. Antenna connection can be done either to the integrated U.FL RF connector, or to an external 50 antenna attached to the RF castellated pad.