SPI-bus ( serial peripheral interface bus ) is an interface standard defined by Motorola. It transfers data between chips only through 3-wire serial communications interface. SPI总线(SerialPeripheralInterfaceBus)是由美国Motorola公司制定的一种串行总线标准,采用三线串行通讯接口,可实现芯片间的串行数据传输。
Universal Serial Bus ( USB ) is a new generation of the standard peripheral interface bus. USB通用串行总线是新一代标准接口总线。