公开(公告)号：US20070192516A1

公开(公告)日：2007-08-16

申请号：US11355677

申请日：2006-02-16

申请人： Sharif Ibrahim ,  William Mahany ,  Larisa Troyegubova ,  Bishnu Karki ,  Kenneth Smalley

发明人： Sharif Ibrahim ,  William Mahany ,  Larisa Troyegubova ,  Bishnu Karki ,  Kenneth Smalley

IPC分类号： G06F13/28

CPC分类号： G06F13/4054

摘要： A virtual FIFO automatic data transfer mechanism. A processor unit may allocate memory space within system memory for a data transfer operation. The processing unit may also program both a source device and a target device to perform the data transfer operation. After the programming, the source and target devices perform the data transfer operation without intervention by the processing unit until completion. The source device may store data into the allocated memory space, and indicate to the target device when it has stored a predetermined number of data bytes into the allocated memory space. In response to receiving the notification message, the target device may read the stored data from the allocated memory space, and indicate to the source device when the target device has read a predetermined number of data bytes from the allocated memory space.

摘要翻译： 虚拟FIFO自动数据传输机制。 处理器单元可以在系统存储器内分配用于数据传输操作的存储器空间。 处理单元还可以对源设备和目标设备进行编程，以执行数据传输操作。 编程完成后，源和目标设备执行数据传输操作，无需处理单元进行干预，直到完成。 源设备可以将数据存储到分配的存储器空间中，并且当其已经将预定数量的数据字节存储到分配的存储器空间中时，向目标设备指示。 响应于接收到通知消息，目标设备可以从分配的存储器空间读取所存储的数据，并且当目标设备从分配的存储器空间读取预定数量的数据字节时向源设备指示。

公开(公告)号：US20100241889A1

公开(公告)日：2010-09-23

申请号：US12696168

申请日：2010-01-29

申请人： Mark Y. Fu ,  Ronald Kunin ,  John F. Sisto ,  Larisa Troyegubova ,  Charles Forni

发明人： Mark Y. Fu ,  Ronald Kunin ,  John F. Sisto ,  Larisa Troyegubova ,  Charles Forni

IPC分类号： G06F1/32 ,  G06F3/00 ,  G06F13/00

CPC分类号： G06F1/3278 ,  G06F1/3209 ,  Y02D10/157

摘要： In one embodiment, provided is a method that includes detecting disconnect of a link at a Universal Serial Bus (USB) device coupled to a USB host via a USB bus, disconnecting the USB device from the USB bus, and modifying a power state of the USB device to a reduced power state. Disconnecting the USB device from the USB bus includes configuring the USB device such that the USB host recognizes the USB device as being disconnected from the USB bus. The reduced power state allows the USB device to monitor a status of the link such that the USB device is able to detect a reconnect of the link.

摘要翻译： 在一个实施例中，提供了一种方法，其包括检测在通过USB总线耦合到USB主机的通用串行总线（USB）设备处的链路的断开，从USB总线断开USB设备，以及修改 USB设备降低功耗状态。 断开USB设备与USB总线的连接，包括配置USB设备，使USB主机将USB设备识别为与USB总线断开连接。 降低的功率状态允许USB设备监视链路的状态，使得USB设备能够检测链路的重新连接。