简介: USB chip: USB chip is responsible for the physical data transmission between the host and the USB device. It is an indispensable core component of the USB host.Classification of USB chips: from the perspective of chip architecture, all USB controller chips on the market can be divided into two types of chips that do not need external microprocessor and those that need external microprocessor.The chip without external microprocessor can be divided into USB interface chip and embedded general micr