Hello,

Is it possible to use the CH376s as SPI master?

I am using the parallel interface on the MCU side, and I use the USB port for mass storage. I would like to use the SPI master port (meant for SD card) to connect other SPI peripherals (for example SPI to Ethernet controller).

I did not see a way to send raw SPI commands to the SPI slave port, only SD card support. Is it possible to do this?

Dear PulkoMandy，

CH376s supply SPI host interface with 6MHz, only supports SD card,can not connect other SPI peripherals.

You can directly use our MCU(CH563) to realize your USB port for mass storage and SPI master port to connect other SPI peripherals.