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    • 4. 发明申请
    • USB ON-THE-GO CONTROLLER
    • USB ON-THE-GO控制器
    • WO2006060527A2
    • 2006-06-08
    • PCT/US2005043396
    • 2005-11-29
    • ADVANCED MICRO DEVICES INCHESSE KAYMUELLER SVEN
    • HESSE KAYMUELLER SVEN
    • G06F13/385
    • A USB (Universal Serial Bus) controller technique for implementing OTG (On-The-Go) functionality is provided. The device may have an EHCI (Enhanced Host Controller Interface) compliant host control unit, and an OTG control unit to implement an OTG state machine partly in hardware and partly in software. The OTG control unit may have an OTG control register and an OTG status register which are accessible by software. Further, the USB controller device may have a device control unit to implement device functionality and a port multiplexer to assign a physical port to either the host or the device control unit. The OTG control unit may be comprised in the port multiplexer. Further, a software driver may read the OTG status register in response to receiving an interrupt from the USB controller device, and write to the OTG control register to force the USB controller device to change its OTG state.
    • 提供了一个用于实现OTG(随时随地)功能的USB(通用串行总线)控制器技术。 该设备可以具有EHCI(增强型主机控制器接口)兼容的主机控制单元和OTG控制单元以部分地以硬件和部分以软件实现OTG状态机。 OTG控制单元可以具有可通过软件访问的OTG控制寄存器和OTG状态寄存器。 此外,USB控制器设备可以具有实现设备功能的设备控制单元以及将物理端口分配给主机或设备控制单元的端口复用器。 OTG控制单元可以包含在端口复用器中。 此外,软件驱动器可以响应于从USB控制器设备接收到中断而读取OTG状态寄存器,并且写入OTG控制寄存器以强制USB控制器设备改变其OTG状态。