SD卡U盘的硬件原理图。 对SD卡 和 U盘 的开发有点帮助！-SD card U disk hardware schematics. On the SD card and U disk helping to develop a bit!

Designing and programming a USB mass-storage device or embedded USB host involves a variety of interfaces, protocols, and structures. Every USB mass-storage device must support two interfaces: • A USB device interface to enable the device