Ampro Corporation COM 830 manual USB 2.0 Ehci Host Controller Support, Routing Diagram

Chapter 2 Specifications

USB 2.0 EHCI Host Controller Support

The 8 USB ports are shared between an EHCI host controller and the 4 UHCI host controllers.

Within the EHC functionality there is a port-routing logic that executes the mixing between the two different types of host controllers (EHCI and UHCI). This means that when a USB device is connected the routing logic determines who owns the port. If the device is not USB 2.0 compliant, or if the software drivers for EHCI support are not installed, then the UHCI controller owns the ports.

Routing Diagram:

24 Reference Manual COM 830