Embedded Hardware System Design Based On Xscale Processor And Research Of Bootloader

The main work of the paper is designing an embedded hardware system after studying Intel Xscale PXA255 processor which base on ARM architecture ,the system take Intel Xscale PXA255 processor as the core, then adding some components such as memory an so on.The paper analysizes Xscale PXA255 processor's structure and characteristics carefully,then makes a detailed record to the request of all pins, causes the joint between the chips to conform to the stipulation.The paper designs power and reset circuit,memory circuit, periphery interface circuit:includeing serial interface circuit,JTAG interface circuit,Ethenet interface circuit,touchscreen interface circuit and LCD interface circuit.we use Protel DXP to design circuit schematic diagram and use PowerPcb5.0 to design PCB with high speed PCB designing technique.Embedded system booting procedure is for initializing hardware and loading OS kernel, The paper conducts a research to the transplant of Bootloader,and Conducting an analysis to Bootloader's address layout,mode,program code and so on;also,the paper discusses how to build the developing environment of Bootloader and how to download it;Finally implements a Bootloader which fits our Platform.The system fits the requirement of lab building ,can run Linux,also can do some common interface experiments.