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With the increasing popularity of the personal computer and digital products , the Universal Serial Bus (USB) has become the standard interface of the PC is an established fact . Development support for USB peripherals are also increasing day by day , for example : digital camera, scanner , keyboard , mouse , USB flash drives . Because the USB device with a hot-swappable, easy to carry , easy to install , low cost , is bound to be applied in a large number of occasions . USB divided into two types of host and device , the host is generally borne by the PC USB products on the market is generally a slave device . Complex chip USB host interface and USB slave interface . With the continuous development of the SOC integration and performance , today's SOC system has reached the order of 100 watts . Transistor density every 18 months according to Moore's Law , doubling , and power technology to achieve the same growth rate , it takes 5 years , it is clear that the power technology has become a bottleneck . Circuit current causes the life of the product and reduced reliability . Serious dynamic voltage drop of the power supply will cause the system to malfunction . Therefore, how to reduce the chip power consumption has become one of the key factors in the current integrated circuit design . In this thesis the design of the USB device IP , while the low-power technology into the design . Firstly, according to the USB protocol to achieve the basic functions of the device IP , designed Transceiver Module Controller module and configure the module , and then complete coverage and functional - based authentication , complete the comprehensive in SMIC35 technology , low-power technology into the design reduce power consumption to 78% of the original power , to obtain the desired effect . Papers in the basic USB functions under the premise of perfect IP Data interface design , to provide a reliable interface timing , the full realization of the reusability of IP , such as AMBA bus interface , the MCU processing interface provides a reference design for the future .
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