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    USB 2.0 OTG CONTROLLER

    OverviewFeaturesRequest Datasheet

    USB 2.0 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, optionally, it is compliant with either xHCI, EHCI/OHCI 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 either ULPI+ or 8/16 bits UTMI PLUS Level3 specification. 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. Additionally, while operating in host mode, USB 2.0 OTG controller can be configured to support either one device connected directly to its port, or multiple devices connected via hubs.

    USB 2.0 OTG controller, while operating in device mode, can optionally include a 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.

    USB 2.0 OTG controller while operating in device mode can optionally include a proprietary EP0 processor block for managing all Standard Requests directed to the control endpoint minimizing software development overhead. Class and Vendor specific requests directed to Control endpoint are routed via the DMA engine to software for processing.

    Optionally, the controller can be provided with no DMA Engine and no buffering and operates in a cut-through mode forwarding and receiving USB payloads and managing only the USB protocol. Customer may in this case implement its own differentiated DMA Engine. Optionally, a simple transmit and receive buffer is included in this configuration which can be accessed by software over the slave register access interface which is typically AHB. This option results in very low footprint hardware which can be used in cases where the software can completely manage the USB traffic – including the sequencing of the USB transactions.

    Compliance:

    • USB OTG Controller IP core is compatible with USB2.0 specification Revision 2.0 and all associated ECN’s.
    • USB OTG Controller IP core with USB OTG EH 2 Revision 1.1a and all associated ECN’s.
    • USB OTG Controller IP core operating in host mode is optionally compliant with xHCI specification version 1.1.
    • USB OTG Controller IP core operating in host mode is optionally compliant with EHCI specification version 1.0
    • USB OTG Controller IP core operating in host mode is optionally compliant with OHCI specification version 1.0a. Configurability
    • Support for managing configurable number of endpoints for device mode.
    • Hardware configurable support for all optional features – viz., SRP/RSP/HNP support
    • Hardware configurable support for USB speeds – HS/FS/LS.
    • Hardware configurable support for different use cases:
    • Optional simple slave mode operation for initiating/completing USB transactions for an area optimized implementation. Can be used for both host and device mode.
    • Optional standard based DMA engine based on either xHCI, EHCI, OHCI while operating in host mode allowing standard drivers to be reused.
    • Optional proprietary DMA engine for initiating/completing USB transactions limiting software overhead. Can be used with Host and Device mode operation.
    usb-2.0-otg-controller  
    •  USB 2.0 OTG Controller can be configured to support all types of USB transfers – Bulk, Interrupt and Isochronous. While operating in Device Mode it can be dynamically configured to support configurable number of endpoints, interfaces, alternate interfaces and configurations.
    • USB 2.0 OTG Controller can be configured to support any combinations of USB 2.0 interface speeds – LS(1.5 Mbps), FS (12.0 Mbps), HS (480 Mbps). Eg combinations are LS Only, FS Only, HS Only, LS and FS Only, FS and HS Only etc.
    •  USB 2.0 OTG Controller has full support for all low power features of the USB Specification supporting Suspend, Remote Wakeup and Link Power Management states – L1, L2.
    •  USB 2.0 OTG controller has full support for all test modes features which is required for obtaining USB-IF certification.
    •  USB 2.0 OTG Controller has full support for OTG features such as SRP, HNP and ADP along with software configurable options to turn on/off these features.
    •  USB Controllers have been Silicon Proven in wide range of products such as Graphics Controller, Flash Storage Controllers, SATA Bridges with support for Bulk Streaming, Embedded Hosts, Docking Stations, Mobile Application Processors, Smart TV, Hubs.

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