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    • 16. 发明授权
    • Sync regeneration in a universal serial bus
    • 通用串行总线同步再生
    • US06724848B1
    • 2004-04-20
    • US09519511
    • 2000-03-06
    • Venkat Iyer
    • Venkat Iyer
    • H04L700
    • H04L7/046H04L7/005
    • A Universal Serial Bus repeater is provided, comprising a method and apparatus for detecting a specified data pattern and regenerating or retransmitting the recognized data pattern. In some embodiments, the invention recognizes an end of sync signal, and is operable to retransmit the end of sync signal and the following data that is presumed to be valid as a result of sync recognition. In other embodiments, the invention recognizes and retransmits a properly aligned end of packet signal, the size of which is dependent on detection of whether the end of packet signal is a part of a start of frame packet.
    • 提供了一种通用串行总线中继器,包括用于检测指定数据模式并重新生成或重新发送所识别的数据模式的方法和装置。 在一些实施例中,本发明识别同步信号的结束,并且可操作用于重传同步信号的结束以及作为同步识别的结果被认为是有效的后续数据。 在其他实施例中,本发明识别和重新发送分组信号的正确对齐端,其大小取决于分组信号的结束是否是帧分组开始的一部分。
    • 17. 发明授权
    • Bus controller and associated device drivers for use to control a peripheral bus having at least one store-and-forward segment
    • 总线控制器和相关设备驱动器,用于控制具有至少一个存储转发段的外围总线
    • US06629186B1
    • 2003-09-30
    • US09309088
    • 1999-05-10
    • John I. GarneyJohn S. HowardVenkat Iyer
    • John I. GarneyJohn S. HowardVenkat Iyer
    • G06F1312
    • G06F13/102
    • A bus controller and its associated device drivers are provided to a digital system to operate and control a peripheral bus, including the selective operation of at least a first portion of the peripheral bus in a store-and-forward manner. The device drivers include a number of programming instructions. Upon programmed with the programming instructions, a digital system is enabled to operate the bus controller to facilitate communication with a first bus agent in this first portion. The programming instructions package a number of request packets destined for the first bus agent into a multi-packet package, schedule the multi-packet package to be transmitted in bulk, at a first communication speed, to a first hub in the first portion, for the first hub to buffer the request packets, and then forward the request packets to the first bus agent, on a packet-by-packet basis and at a second communication speed. In one embodiment, the second communication speed is slower than the first communication speed. In one embodiment, the programming instructions further schedule communications destined for a second bus agent of this first portion, for transmission to the first hub, at the first communication speed, for the first hub to repeat the communications for the second bus agent without buffering, at also the first communication speed.
    • 将总线控制器及其相关的设备驱动器提供给数字系统以操作和控制外围总线,包括以存储和转发的方式选择性地操作外围总线的至少第一部分。 设备驱动程序包括一些编程指令。 在使用编程指令编程时,数字系统能够操作总线控制器以便于在该第一部分中与第一总线代理的通信。 编程指令将目的地为第一总线代理的多个请求分组封装成多分组包,将以多个第一通信速度批量发送的多分组分组调度到第一部分中的第一集线器,以便 第一集线器缓冲请求分组,然后逐个分组地以第二通信速度将请求分组转发到第一总线代理。 在一个实施例中,第二通信速度比第一通信速度慢。 在一个实施例中,编程指令进一步调度目的地为该第一部分的第二总线代理的通信,用于以第一通信速度传输到第一集线器,以使第一集线器重复第二总线代理的通信而不进行缓冲, 也是第一个通信速度。