Research And Design Of Data Acquisition Interface Circuit Based On The Mini PCI Bus

Data acquisition system is the key link in the process of information processing,For different occasions acquisition system of interface circuit design indexes aredifferent.Nowdays, Used for PC’s acquisition system interface circuit is the most ISAprimarily, this makes the data rate is relatively low and hinder the data tell therealization of the transmission. The advent of Mini PCI, as a kind of high performancelocal bus, with its unique advantages and outstanding performance gradually replace thedata transfer rate lower ISA bus, become the mainstream of the PC bus，the research onthis topic based on Mini PCI bus and TMS320C6205DSP technology to realize thesignal of high speed and high precision A/D data acquisition system of interface circuitdesign, in order to adapt to the need.The paper introduced Mini PCI the characteristics of the bus, Mini PCI busstandard, Mini PCI bus operation and so on in terms of hardware design, this system has64road,16road simulation switch quantity and quantity of the no.1of exchangequantity, in view of the signal regulate circuit, A/D conversion module circuit, databuffer circuit, Mini PCI interface circuit, DSP control circuit and so on is A detailedstudy of the method. System USES bullying, LTC1606realize modulus transformation;The TI company TMS320C6205digital signal processor data acquisition and storage, itis can complete to signal collection control, and can complete the data transmissioncontrol; CY7C4265realize with the A/D and DSP data cache and level between theconversion, and through the TMS320C6205embedded PCI interface modules realizeDSP and Mini PCI interface between the data. Another simple introduction to datacollection interface circuit PCB production process and its layout design problems thatshould be paid attention to in the process of simulatio n and soft armor Pspice16.3tosimple circuit simulation, ensure the rationality of the design.In software design, the whole system is to realize the function of another importantlink, need involves device drivers and data acquisition system application of two parts,the WinDriver and VisualC++developed Mini PCI devices are the drivers andapplications.