键盘可以直接接在单片机上，实现标准pc键盘的使用

PHILIP的一双串口单片机的第2个串口的通讯例程-PHILIP pair of the serial microcontroller two serial communication routines

数字钟的显示程序以及一个检验显示的程序，用在8051或8031-digital clock display procedures and an examination revealed that the procedures used in 8051 or 8031

RHM500读IC卡驱动,使用与C51系列，能读出多种IC卡芯片-THIE IS A PROGRAM OF RHM500 READ IC MODEL DRVER.IT CAN READ A IC LIKE M1S50/M1S70 AND SO ON.YOU CAN TRY IT ON C51 OR OTHERS.THAT IS ALL!

AT89S51资料，中文版的，很利于大家学习-AT89S51 information, the Chinese version, it is beneficial to them to learn from

ds1302 实时时钟程序 对单片机者很有帮助-ds1302 real time clock procedures on SCM were very helpful

16*2LCD键盘扫描显示程序-16* 2LCD keyboard scan display program

c8051f单片机支持软件读写flash操作例程与相关资料，使得能过无需外接eeprom等存储器，就能保存非易失性数据（掉电不丢失的数据）。-c8051f MCU support software routines to read and write flash operation with relevant information, It would make no such external eeprom memory, we will be able to preserve nonvolatile data (power-fail without loss of data).

IRQ4中断有三个中断源：1KHz、2Kz和4KHz,每一个中断分别控制与IOA0-IOA1,IOA2-IOA3和IOA4-IOA7相连的LED灯-IRQ4 interrupt has three interrupt sources: 1KHz, 2Kz and 4KHz, each interruption of the respective control and IOA0-IOA1, IOA2-IOA3 and IOA4-IOA7 connected LED lights

在用单片机设计的电梯模型中，电梯下降的控制程序-Single-chip design with an elevator model, the decline in elevator control procedures

keil公司提供的c51例子-Keil provided examples of c51