IO port leads all digital and analog IO ports, each IO port has positive and negative power supply interface standard
leads to an I2C interface on the motherboard , convenient and I2C devices connected
Increasing the DC power connector . NANO USB interface board supply current is actually only 50MA, to bring high-current devices, such as when the steering is obviously insufficient , this time in the DC power supply interface provides external power to ensure the stability of equipment operation.
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