这是一个ug018 技术文档

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Boost电原理图，开关电源有时候会用到该电路，可参考其计算变量-Boost electrical schematics, switching power supply can sometimes be used in the circuit, refer to the calculation of variables

串行通信MCS-51单片机内部有一个全双工的串行通信口，即串行接收和发送缓冲器（SBUF），这两个在物理上独立的接收发送器，既可以接收数据也可以发送数据。但接收缓冲器只能读出不能写入，而发送缓冲器则只能写入不能读出，它们的地址为99H。这个通信口既可以用于网络通信，亦可实现串行异步通信，还可以构成同步移位寄存器使用。-MCS-51 microcontroller serial communication within the a full-duplex serial communication port, that is, the serial receive and send buffer (SBUF), these two physically separate receiver transmitter, both can receive data can be sent data. Only read by the receiving buffer can not write, but can only write to send the buffer is not allowed to deliver, their address is 99H. The communication port can be used for both network communications, can also achieve the serial asynchronous communication, but also constitute a synchronous shift register to use.

使用vb开发的课程设计，数据库的基本功能都实现了。-Vb development of the use of curriculum design, the basic functions of the database have been achieved.

根据设定好的密码，采用二个按键实现密码的输入功能，当密码输入正确之后，锁就打开，如果输入的三次的密码不正确，就锁定按键3秒钟，同时发现报警声，直到没有按键按下3种后，才打开按键锁定功能；否则在3秒钟内仍有按键按下，就重新锁定按键3秒时间并报警。-err

自适用滤波器设计的FPGA的实现 南开大学微电子系 华为项目资金支持-Since the application of filter design FPGA realization of Nankai University, Department of Microelectronics Huawei project funds to support

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2009年全国大学生电子设计大赛E题--电能收集充电器-2009 National Undergraduate Electronic Design Contest E question- Energy Chargers collection

文中给出了在数字系统设计时常用的器件,和它们的参数希望对大家有所帮助-The paper gives the design of digital systems in the commonly used devices, and their parameters would like to help everyone

本系统主要以沈阳黄页业务管理为基本要求，主要功能包括：1. 业务员及业务经理权限的设定。2. 业务员部门的划分。3. 业务员在线录入信息。4. 企业公告版。5. 站内短信留言。-mainly to the system in Shenyang Yellow Pages business management as the basic requirements, main functions include : 1. Clerks and business manager of the authority set. 2. The clerk division. 3. Information online entry clerk. 4. Business bulletin boards. 5. Station SMS messages.