单片机设计外文翻译---单片机工作原理.docx

附 录 一、英文原文: The Principle of Microcontroller In operation the Single Chip Microcomputer (SCM)is connected to a host PC microcomputer via aserial port. The connecting cable is included with the unit. The SCM is supplied fitted with an 8751 chip. This chip features internal ROM containing versatile,real time monitor to communicate with a PC via the built-in serial port. The monitor includes a line assembler, disassembler, break points, single stepping and the facility to examine and exchange memory or register contents. A special function of the monitor is to store the program under development in the RAM of the SCM development board. The great advantage of the method that is direct access to the I/O ports is provided by the 8051 is retained and, consequently,the need for a costly in-circuit-emulation (ICE)package is not required. Once a program has been completed on the SCM development system it can be easily transferred intothe ROM of another 8751 via an EPROM programmer. This second 8751, now containing the control program, can be removed from the Programmer and installed into the SCM-TB target board. Most importantly, because direct access to the input/output ports of the 8751 has been retained during the development stage there is no need for peripheral I/O and address decoding chips; only the8751 chip is required. Thus the Single Chip Micro-Control, not multi-chip control is realised. The SCM-TB target board feature a single 40-wayDIL socket for the micro-controller chip plus termination facilities identical to the SCMDevelopment Board for simple and convenient transfer of any connecting cables. 8751 ICS should be purchased separately for the target board.In addition to the Single Chip Development System and Target Board, a number of add-on boards are available. These include a Port Monitor Board,Multi-Channel ADC, Screw Terminal Board andOutput Driver Board. Voice input to a machine is the most natural form of man-machine communications. Research