Full PCI Express* mini-card slot, with PCIe 2.0 compliant features
o Works with half mini-PCIe cards with optional converter plate
o Provides USB 2.0 Host Port at mini-PCIe connector
The recommended output rating of the power adapter is 5V at up to 3A.
功耗这么高
The GPIO output pins on Intel® Galileo are provided by an I2C Port Expander that is running at standard mode (100 kHz). Each I2C request to update a GPIO requires approximately 2ms. In addition to software overhead, this restricts the frequency achievable on the GPIO outputs to approximately 230 Hz.
gpio是通过一个i2c扩展芯片扩展的