SD卡读卡器原理图和程序，源代码是用C语言编写的。-SD card reader schematic and procedures, source code is written using C language.

SD卡的相关资料关于SD卡的读于写的操作，及其原理结构-Relevant information on the SD card SD card read in the write operation, and the principle structure

该文档介绍了SD卡的一般原理及相关结构，包括IO口的介绍等，文档内部赋有SD相关的Atmega128单片机读写程序，希望对你有帮助-This document describes the general principles of the SD card and related structures, including the introduction of IO port within the document are endowed with SD Related Atmega128 mi

FAT文件系统原理，对编写SD卡的FAT文件系统驱动有帮助-Principle of the FAT file system, the FAT file system write SD card driver