MMCSDTimming MMC卡的时序图，比起SD规范又臭又长的文档，要简洁的多了。SD卡也可以以此作为参考-MMCSDTimming MMC card timing diagram, compared to SD specification also documents a long foul, it is necessary to more concise. SD card can also be used as a reference

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.

基于FPGA的画中画处理PDF技术文档，采用SD卡里图片读出来做为底图，然后再图上叠加另外一个图片或者视频-Based on the FPGA picture in picture processing PDF technical documentation