Smart Phone Hardware Design And Implement Based On Intel Xscale Processor

With computer entering the rear-PC era, the development of multimedia technology and wireless communication technology, varieties of multimedia terminals (i.e. PDA) application, converging with communication, computing and multimedia function become new hot points of developing application, and multimedia application processors are one of the important sections. As the multimedia terminals of embeded system, they will be utilized in the fields of vehicles, mobile communication or handset etc. where the requirement of speed, current consumption and size are strict. So it is meaningful to design a mobile device which has small size, strong real-time capability, low current consumption and flexible expansibility, which can meet the above requirement of embeded system and end users. It has been determined by the trend of development from feature phone to smartphone that smartphone is confronted with the opportunity like mobile communication network with the construction of domestic 3G network. This design expands and enhances the multimedia application of smartphone, and will not only provide new product to domestic market in short time, but also meet the requirement of end users for future handset device in the side of multi-function.Firstly, the development outline and research background of smartphone are introduced in this paper, and the popular hardware and software platform solutions are compared through the market survey and customer requirement analysis. In this paper it is indicated that Intel Xscale processor and embedded Linux OS have unique performance advantages individually in their own fields. Next, in the paper the integrated hardware architecture and the principles of function modules, design method, IC selection and debug method are introduced, And the power supply system, the principles of different power types and power supply distributions are described in detail. Then, in the paper the principles and characteristics of audio interface, control interface are introduced and the design notion of audio system architecture is proposed. The control principle of TFT-LCD display and the peripheral circuit design to solve the failure of PXA270 display controller for LCD timing are also introduced. The interface design of USB2.0 Hi-speed Transceiver is emphatically introduced and design gists of enhancing the signal integrity are proposed in this paper. At last, testing method, test data and system debug process of key feature modules are also presented in detail.The prospective goals have been gained by debugging and testing and its function is well. Power management system supplies appropriate voltage and current to all function modules to ensure the system to run stably and efficiently. All the peripheral interface runs normally. USB high speed transport is compatible to USB 2.0 specification. The mass produce target is implemented which caters to the requirement of smartphone market.