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本文件中包括了几乎所有的常见封装尺寸，对PCB制作很有帮助-this document, including almost all of the common package size, the PCB production helpful

c8051f020 i2c 源码。对其操作有详细描述。-dvsah dfvdnjkg b fdv

winavr，atmega8，44780，1602液晶屏程序-winavr, atmega8, 44780,1602 LCD screen procedures

帮朋友写的一个用MCS-51的IO口模拟PWM使外接LED亮度渐变的程序，虽然程序小，不过注释清楚，并已调试OK。-written for a friend with a MCS-51 simulation of the IO mouth so that external PWM LED brightness gradual process Although procedures for small, but clearly Notes, and debugging OK.

安装在手机里的安全的免费读书软件，目前装机量已达1500万，并被内置到诺基亚、摩托罗拉、多普达等手机中。用户的手机在安装掌上书院之后，可以阅读保存在手机里的各类资料-e book reader

数据块的首址在R0中，字节数在R7中。 单字节无符号数据块排序（减序） 影响资源：PSW、A、R1、R6-the first data block site of the R0, the total number of bytes in which R7. No symbol single-byte data blocks ranking (by order) affecting resources : PSW, A, R1, R6

DS1820 C51 子程序-C51 subroutine DS1820

Small RTOS 51 DP－51下载仿真实验仪上实现一个闹钟的源代码。-Small RTOS 51 DP-51 download simulation instrument to achieve an alarm clock source.

出租车计价 动态显示led 键盘 完整的流程图 设计过程-Taximeter dynamic display led full keyboard design process flow chart

一个CPU卡读卡器源代码，接口全部由单片机IO模拟实现，成本极低-a CPU card reader source code, microcontroller interface all IO simulation, low cost