一款PIC单片机的学习开发板原理图，可自制学习

PTR8000 nrf905模块 接收发送-PTR8000 nrf905 module receives sent

用TC2实现的DOS多任务功能，包含全部源代码。-using the DOS TC2 achieve multi-tasking functionality, including full source code.

cc2510LED自动闪烁，代码不难，帮助熟悉芯片IO的配置，和开发环境的使用，本程序是以IAR为开发环境

pic18f458单片机 io口是如何工作的-pic18f458 microcontroller io port How does it work

sigma_designs的tuner驱动-sigma_designs the tuner driver

RAM掉电保护电路--Design of RAM power-off protection circuit.

sst89c58下载器，使用keilc51的debug调试器下载。将本程序编译后写入sst89c58，并编程为remap 4kbytes。该芯片即有了keil环境下载功能,当p1.0拉低时，启动时进入下载程序，进入下载程序后将会自动删除block0,p1.0高电平时进入用户程序。 进入下载程序后，可以通过串口和keil的仿真环境连通，波特率自动调节,选择load HEX文件，即可将程序下载到sst89c58的低端32keeprom中。除了7e00-7fffh被占用-sst89c58 downloader, use the debug keilc51 Debugger download. This procedure compiled into sst89c58 and programming to remap 4kbytes. The chip has Keil environment that is the ability to download, p1.0 down, start the download entered into the download will be automatically deleted after block0, p1.0 to I enter the user program. After entering the download, through serial and Keil simulation environment connectivity, baud rate adjusts to choose load HEX documents, procedures and can be downloaded to the lower end of 32keeprom sst89c58 China. Apart from 7e00-occupied 7fffh

sd卡的高速读写程序，sd模式（4数据线），是普通spi模式的约6倍，以及完全的sd卡的data sheet-sd-card reader procedures, sd model (four data lines), is the general pattern of about 20 six times. and full sd card data sheet

zigbee2006协议规范中文 详尽的zigbee协议描述文件-zigbee 2006 protocol

HTTP在嵌入式系统中的应用及扩展，HTTP在嵌入式系统中的应用及扩展-HTTP in the Embedded System and Extension, HTTP in the Embedded System and Extension of