C51 用PCA 模拟串口，很有参考价值得源码

crc计算方法之一，适合于有较大ROM或外部存储器的单片机-unicef.org calculation method, one more suitable for external memory or ROM Microcontroller

ISD4003-4M语音的详细使用说明，和ISD4003-4M的技术资料！-ISD4003-4M detailed voice instructions, and ISD4003-4M technical information!

avr单片机加外围三个传感器，分别是SMB380三轴传感器，ST10温湿度传感器，用iic控制,串口跟主机通讯-avr microcontroller plus three external sensors, namely the SMB380 triaxial sensors, ST10 temperature and humidity sensors, with iic control, serial communication with the host

利用单片机实现SD卡读写程序，比较通用，大家可以参考，希望对你有所帮助。-Use of SCM SD card reader program, a more generic, we can refer to, want to help you.

【液晶显示器的C语言程序设计 Freescale 8位微控制器】一书的光盘，对LCD驱动编写很有帮助-LCDs [C-Language Programming Freescale 8-bit microcontroller] 1 book CD-ROM, LCD driver for the preparation of useful

关于ADuC845中URAT功能所写的小程序-On the ADuC845 in URAT function of small programs written by

基于51单片机的I2C通信程序，可以顺利实现I2C通信-Based on 51 MCU I2C communication program can be successfully I2C communication

sd 卡驱动软件包: SD卡物理层 ---- SD卡SPI模式支持的命令-sd card driver package: SD Card Physical Layer SD cards support SPI mode command

平台化的单片机设计系统,内舍多种芯片驱动程序-Design of single-chip platform systems, with multiple homes chip driver

采用IAR在线调试ADI公司基于ARM7内核的ADUC7026的ExternalMemory代码-IAR debug using online ADI Corporation ADUC7026 based on ARM7 core of ExternalMemory code