USB 3.0 OTG controller are designed for compliance with USB2.0 specification Revision 2.0 and all associated ECN’s and USB OTG EH 2 Revision 1.1a and all associated ECN’s. While operating in Host mode, based on configuration selected, it is compliant with xHCI, enabling standard Windows, Linux, Android drivers to be reused minimizing software development overheads and associated risks involved with custom bare metal driver solutions. Its Physical interface is compliant with USB 3.0 Pipe Specification v4.3 (for SS mode) and ULPI+ or 8/16 bits UTMI PLUS Level3 specification (for HS/FS/LS mode). The system interface is compliant with either AHB and/or AXI interface allowing easy integration. Optional custom bridges can be bundled as a service offering.
USB 3.0 OTG controller, while operating in device mode, can optionally
include a our proprietary high performance DMA engine for moving USB payloads. The register interface of the DMA Engine is very simple allowing device side class specific function drivers to be implemented easily. Reference mass storage class device side function drivers are made available to all licensees. The same high performance DMA engine can be reused optionally for host mode operation, in which case custom bare metal drivers can be developed to manage the connected devices allowing highly optimized footprint for hardware and software. All buffering associated with the DMA Engine are configurable based
on latency and performance requirements.