Design Of High Speed Low Power 32 Bit RISC System For Portable Streaming Media

Streaming media technology which combines with multimedia technology, IP technology and network technology is one of the most development potential high-technologies. It plays a particular important role in many areas, such as new generation of wireless mobile communications, IPTV video-on-demand, and portable multimedia player. At the same time, the practical application has launched a series of new challenges about the development of streaming media technology, including the requirements of high speed, low power, portable function, wireless communication and the conversion of different video compression modes. As the continuous progress of the streaming media technology, it is certain that there will be strong growth and big prospective marketing in the information technology industry related to it.The portable streaming media system based on 32 bit RISC processor with high speed and low power is researched and designed. The portable system uses the embedded system technology that is the most popular in computer area to design the portable multimedia play terminal, utilizes the high performance embedded processor and embedded Linux operating system as the design core. The system can be used in portable system, such as portable wireless video system.The Intel PXA270 processor used in the system design is a high performance and low cost processor, especial for portable equipments, but the processor itself doesn't support the PCI pus interface devices, so the I/O interface system of the processor must be improved, adding the PCI interface.The system design and hardware design of each module of the system are given in the paper, such as power supply module, AC97 audio codec module and Ethernet communication module; PCI interface function is detail researched and it is will be implemented in Verilog HDL language through the method of FPGA+Open Source PCI Core. The implement method of the PCI device driver in program is given too. Consequently, it reaches the goal that combines the system design with hardware design and software design. The PCI interface has been verified successfully through time-sequence simulation by testing the FPGA starter development system. This makes it become a new possibility that the PCI interface function of the Intel PXA 270 processor is used in the practicall industry application.