51单片机外文文献.pdf

June 2007 Chinese Journal of Scientific Instrument V01.28 No.7 AT89C51 In-Circuit Programming Jiang Youl ，Tian Dil ，Fang Xian92 ，Zhao Dongzhi3 (J College of Instrument ScienceElectrical Engineering ，Jilin University ，Changchun 130026 ，China ； 2 National Institute of Metrology P.R ．China ，Beijing 100013 ， China ； 3 Institute of Geology and Geophysics ，Chinese Academy of Sciences，Beijing 100029 ，China) Abstract ：Using MCS5 1 series single—chip microcomputer as CPU ，a mainboard was designed ，which implements most functions of 8 一 bit PCI04 bus and has an ethernet interface ．Combined with commercial PCI04 bus interface modules ，an entire test and control system was constructed ．Compared with standard PC 1 04 mainboard based X86 CPU ，the proposed mainboard features simple development and application ，lower cost ， and is suitable for the design and development of low speed control systems ．The developed mainboard and system were applied in the control sys—tem of ZDZ mass spectrometer ．The trend of the technology is to develop advanced PCI04 mainboard based a 32 一 bit microcontroller ． Key words ：microcontroller ；ethernet ；embedded system ；measurementcontrol system ； 1 Epigraph application can be reprogrammed remotely, This application note illustrates the over a commercial telephone line. The in-circuit programmability of the Atmel circuitry described in this application note AT89C51 Flash-based microcontroller. supports five volt programming only, Guidelines for the addition of in-circuit requiring the use of an AT89C51. The programmability to AT89C51 applications