Hardware Design For Supporting The Intelligent Upgrade Of Bank And Tax Control Equipment

The Bank and Tax embedded systems are mainly made by ARM7. They are no suit to the increasing requirement of the market.This paper completes the hardware design of the Bank and Tax embedded system based on ARM9. It supports the intelligent upgrade of Bank and Tax control equipment. The hardware design is base on EP9312 of ARM9 series CPU product. The embedded system platform's integrity is good, the motherboard area is small, the periphery connections are many, the cost is low, and the running rate is quick. This paper mainly completed the following work:Introduced the embedded product's development and the life cycle. Described the investigation and research of the embedded system and colligated the requirement. Described the embedded processor of ARM series, and introduced several embedded operating systems which are in commonly use. It also made the detailed introduction to the EP9312 structure, and described the principle of design.This paper compares EP9312 with other processors. The reason to choose the EP9312 was also given. Described the technical specification of the system, the Super I/O, PHY, electric level conversion, FLASH, SDRAM, bootloader etc. Described the new design of the display module and the serial port module. Some principles to enhance the system stability were also given. Completed the whole hardware design of the system.This paper introduced the principle of the high speed PCB design, the principle of layout and the wiring of the PCB design. The paper also introduced the transmission line effect problem in the wiring process which must pay attention, and give the method to avoid it. Finally, it has given the finally forms product of this paper, and some achievements which obtains in the design process. It has made the forecast to the embedded system product.Now, the Bank Embedded terminal based on this paper' hardware system was already on the market.