lishua_m的博客

全局搜索磁盘上的文件，好用到没有朋友，改变找文件的方式！

pci+express体系结构导读这本书是pcie入门经典数目，由王奇编著，内容简洁明了，对了解学习pcie总线，nvme协议等有极大的帮助。

做过几个单片机的项目，现从事数控工作。但对单片机的兴趣一直不减，为了不至于生疏，需要不时练习一下。偶然听说proteus这个仿真软件，于是拿来用用。

关于erilog的一些基础的例子，包括全加器，译码器之类的。

实现的功能主要有： 1、以数字形式显示时、分、秒的时间； 2、要求手动校时、校分、校秒； 3、调节时间时对应显示位以2Hz频率闪烁； 4、时与分显示之间的小数点常亮； 5、分与秒显示之间的小数点以1Hz频率闪烁；

MC74HC4060A - 14−Stage Binary Ripple Counter With OscillatoThe MC74HC4060A is identical in pinout to the standard CMOS MC14060B. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs. This device consists of 14 master−slave flip−flops and an oscillator with a frequency that is controlled either by a crystal or by an RC circuit connected externally. The output of each flip−flop feeds the next and the frequency at each output is half of that of the preceding one. The state of the counter advances on the negative−going edge of the Osc In. The active−high Reset is asynchronous and disables the oscillator to allow very low power consumption during stand−byr - ON Semiconductor。