January 28, 2022

Orange Pi 4 (Rockchip 3399) USB

This may well grow into a big section.

The Rockchip RK3399 has two host USB 2.0 controllers and two USB 3.0 OTG controllers. One of the OTG controllers is routed to a USB-C and the bootrom is capable of doing things with it.

The following set of pages have always been extremely helpful:

Right now I am studying the bootrom code.

Have any comments? Questions? Drop me a line!

Tom's electronics pages / tom@mmto.org