Hardware Research And Design Of The IP Camera Terminal Based On Cadence

With the rapid development of the social economy and the science, the whole society has entered the information age. People's life are getting better and better, and their own safety awareness are improving constantly,people want to achieve the long-distance video surveillance,so the security system has come into people's lives and work gradually.This article proposed a vision for The IP camera terminal hardware design based on Cadence software and ARM9 core microprocessoron ,based on the analysis of the development of EDA technologies and The IP camera terminal.This article first introduced the terminal system's functional requirements, proposed an overall design framework of The IP camera terminal with GM8180 core microprocessoron,and it described the circuit principle of all the three circuit boards' hardware modules in detail.Take the core board for example,it introduced how to use the OrCAD software to complete the core board's schematic design,including memory circuits (DDR circuit and FLASH circuit), Ethernet circuit,video decode circuit,and so on. It introduced the core board's layout,and how to use Allegro software to complete the PCB design of the core board, it focused on the differential routing and DDR isometric routing,especially the high-speed signal routing between GM8180 and DDR chips,and It carried out an analysis and study in detail to this design above.Then we used the Cadence software's SpecctraQuest simulation software to simulate the key net which is the terminal system's high-speed signals between GM8180 and DDR chips.Through analysis of simulation results, it determined the whole system's work timing is accuracy.Finally, according to the design of the PCB, we made the circuit board , did the three boards welding and debugging, then did the whole system debugging. Through the whole system's application, it verified that using Cadence software to circuit principle design and simulate is accuracy, it can not only reduced the design cycle greatly ,but also can save the development costs ,also it showed the Cadence software's advantages of high-speed circuit design.