NEC公司的ASSP芯片pdf文档，用于步进电机和直流电机的PWM控制，支持与51单片机通信。...

LPC900单片机设计方案--自动响铃实验系统-LPC900 single-chip design- Automatic ring experimental system

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之前看过论坛上有一个C8051和S3530A的通信程序，但我认为很复杂而不具有通用性，我自己写的一个3530通过I2C总线与单片机的通信程序,虽然很短,但是很实用.-Read before the forum have a C8051 and S3530A communications procedures, but I think very complex and not universal, and I wrote it myself a 3530 through the I2C bus communication with the SCM process, although very short, but very practical .

C51源程序，实现IAP功能，可实现嵌入式系统的自主学习功能

C8051控制器操作SD卡实现文件系统，兼容FAT16,FAT32-C8051 controller operation SD card file system compatible with FAT16, FAT32

MSP430全系列下载器，MSP430全系列下载器-Download a full range of MSP430 devices, MSP430 series downloader

用于串口的输入输出调试，可用于单片机及PC机上实现。-Serial input and output for debugging, can be used for single-chip microcomputer and PC machines realize.

频率计是用单片机89C51和几块数字电路几个三极管-Frequency meter is used and a few 89C51 single-chip digital circuit several triode

Atmel单片机的原理图啊，需要的快下 啊，免费的，别人的-Atmel MCU Schematic ah, ah, under the need for fast, free, and others

经典行列矩阵的密码锁~~~~~很多注解~~~很实用-The ranks of the classical matrix locks many comments ~~~~~ ~ ~ ~ very practical