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Chapter 2
Specifications
24
Reference Manual
COM 830
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:
Summary of Contents for COM 830
Page 1: ...COM 830 Computer On Module Reference Manual P N 5001829A Revision A ...
Page 10: ...Chapter 1 About This Manual 4 Reference Manual COM 830 ...
Page 90: ...Chapter 4 BIOS Setup Description 84 Reference Manual COM 830 ...
Page 92: ...Appendix A Technical Support 86 Reference Manual COM 830 ...