| This thesis is of "Portable Digital Assistant" (Project No.021105805), one of the most important scientific research projects in Science and Technique Plans of Zhejiang Province.The Portable Digital Assistant is a consumer electronics, which can store the data in the memory cards of digital products without computer around, and also be used as a large high-speed portable USB hard disk. This product proposes a good solution to the small capacity and high-cost of the memory cards.Basing on the basic principles of Embedded System design, this thesis describes the design and development of Portable Digital Assistant, which mainly involves four aspects: ARM processor, USB communication, Mass Storage Device and Power Management. |