12864 LCD万年历芯片 驱动芯片KS0108

在做项目（工程）的时候，我们经常要用到比较多的按键，而且IO 资源紧张， 于是我们就想方设法地在别的模块中节省IO 口，好不容易挤出一两个IO 口，却 发现仍然不够用，实在没办法了就添加一个IC 来扫键。一个IC 虽然价格不高， 但对于大批量生产而且产品利润低的厂家来说，这是一笔不菲的开支! 那，我们能不能想到比较好的扫键方法：用最少的IO 口，扫最多的键？可以吗？-Doing the project (engineering), we often use the relatively large number of keys, and the IO resource constraints, so we are trying to save in another module IO ports, finally out of one or two IO ports, only to find is still not enough there is really no other way to add an IC to sweep on the keys. Although the price of an IC is not high, but low profits, high-volume production and product manufacturers, this is spending a lot of money! That, we can not think of a better scan key method: with a minimum of IO ports, scan Most of the keys? OK?

51单片机模拟spi串行接口程序，在keilc51下编写-51 single-chip analog spi serial interface procedures keilc51 prepared

本设计介绍了bh17无线耳机的制作方案，包括整体设计思路，以及电路图等。-The design introduced the wireless headset bh17 production programs, including the overall design concept, as well as circuit diagrams, etc..

单片机tcpip通讯-Single-chip communication tcpip

单片机与嵌入式的经典应用推荐－－阻抗测量芯片AD5933.doc-Microcontroller and Embedded classic application of the recommendation- impedance measurement chip AD5933.doc

AVR单片机的源代码，VHDL代码。实现了AVR单片机的功能。-AVR microcontroller source code, VHDL code. AVR microcontroller implements the function.

Max7219驱动四位数码管LED，用于AVR mega64单片机，已经调试通过。-MAX7219 drives four digital tube LED, used for single-chip AVR mega64 have been debug through.

C51单片机c程序，实现无线芯片cc1020的CVSD语言编解码和传输-C51 microcontroller c procedures, the wireless chip cc1020 CVSD language codec and transmission

我自己做的给予ST公司的upsd3234a单片机的频率计。可以测量10K以下的频率。这是此频率计的自检程序，在KEIL上调试仿真通过。-I have to do to give the ST

PT16312驱动程序，现在80%的家电VFD（荧光显示屏）都用它做驱动IC驱动！外部可接24个按键和8个口线。-PT16312 driver, now 80% of the appliance VFD (Fluorescent Display) are using it so driver ICs drive! External access the 24 keys and eight mouth lines.