This Module combines the CH376S USB/SD Flash Storage Controller with built-in support for the FAT32 file system, and the MCP795XXX Real Time Clock, in a compact and convienent form factor. This allows ...

https://github.com/djuseeq/Ch376msc/blob/master/src/CommDef.h And 2 guest interfaces: USB 2.0 and a second 4-wire SPI bus for SD/MMC/TF cards. DEFINE_DEVICE_TYPE ...