两个7段共阳LCD显示器，可以调整倒计时时间

一个基于C51的多功能抢答器的源码及文档-a source code and document of**** based on C51

AD977acn的应用电路及源码，使用凌阳的IDE编写的源码，提供底层的驱动。-AD977acn circuit and the application source code, the use of Sunplus IDE prepared by the source. for the bottom of the drive.

用于C51上的modbus协议，经测试可运行，但还不完善-C51 for the Modbus protocol, the tests will be run, but still not perfect

用8051实现FPGA（电路与代码）~

这是简易波形发生器单片机源程序，利用7289和89c51来完成实验，程序简单-This is the simple microcontroller source waveform generator, using 89c51 7289 and to complete experiment, simple

51单片机控制ISD1420实现选段播放功能的实现-ISD1420 single-chip implementation of 51 selections to control playback of the implementation

　C8051F330/1 MCU 有一个可编程内部高频振荡器、一个可编程内部低频振荡器和一个外部振荡器驱动电路。可以通过对 OSCICN 和 OSCICL 寄存器编程来使能/禁止内部高频振荡器和调节其输出频率（参看振荡器框图）；可以通过对 OSCLCN 寄存器编程来使能/禁止内部低频振荡器和调节其输出频率（参看图9.3）。系统时钟可以由外部振荡器电路或任何一个内部振荡器提供。表9.1给出了内部振荡器的电气特性。 -C8051F330/1 MCU has a programmable internal high-frequency oscillator, a programmable internal low frequency oscillator and an external oscillator drive circuit. Can register on OSCICN and OSCICL programming to enable/disable the internal high-frequency oscillator and adjust its output frequency (see diagram oscillator) OSCLCN can register through the programming to enable/disable the internal low frequency oscillator and adjust its output frequency (see Figure 9.3). System clock can be external oscillator circuit, or any provision of an internal oscillator. Table 9.1 gives the electrical characteristics of the internal oscillator.

HD44780LCD驱动源代码文件,有一定的参考价值.希望大家共同进步.在此也感谢我的同事对我的帮助和支持!谢谢!-HD44780LCD driver source code files, has a certain reference value. I hope that progress can be shared. Here also thank my colleagues for my help and support! Thank you!

关干高速PCB设计的设计技巧，PCB硬件开发指南。-Dry off the design of high-speed PCB design techniques, PCB hardware development guide.

这是一个时钟程序，有可调功能，走时比较准确，还可定闹钟，比较实用-This is a clock procedures, have adjustable features, more accurate travel time, but also set an alarm clock, more practical