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    • 39. 发明申请
    • APPARATUS FOR SYNCHRONIZING A DATA HANDOVER BETWEEN A FIRST CLOCK DOMAIN AND A SECOND CLOCK DOMAIN
    • 用于同步第一时钟域和第二时钟域之间的数据切换的装置
    • US20120303994A1
    • 2012-11-29
    • US13113730
    • 2011-05-23
    • Thomas BauernfeindStephan Henzler
    • Thomas BauernfeindStephan Henzler
    • G06F13/42H04L7/00
    • H04L7/005G06F5/12G06F2205/061G06F2205/102H04L7/0012
    • Embodiments of the present invention provide an apparatus for synchronizing a data handover between a first clock domain and a second clock domain. The apparatus includes a calculator, a first-in-first-out storage, a synchronization pulse generator, a fill level information provider and a feedback path. The calculator is clocked with the clock of the first clock domain and configured to provide a synchronization pulse cycle duration information describing a temporal position of synchronization pulses at a clock of the second clock domain. The first-in-first-out storage is configured to take over an input data value in synchronization with the first clock domain and to provide an output data value in synchronization with the second clock domain and in response to a current synchronization pulse. The synchronization pulse generator is clocked with the clock of the second clock domain and configured to generate the subsequent synchronization pulse such that the subsequent synchronization pulse is located at the temporal position described by the synchronization pulse cycle duration information. The fill level information provider is configured to provide a fill level information describing a fill level of the first-in-first-out storage. The feedback path is configured for feeding back the fill level information to the calculator that is further configured to adjust the synchronization pulse cycle duration information based on the fill level information.
    • 本发明的实施例提供了一种用于在第一时钟域和第二时钟域之间同步数据切换的装置。 该装置包括计算器,先进先出存储器,同步脉冲发生器,填充级信息提供器和反馈路径。 计算器用第一时钟域的时钟计时,并且被配置为提供描述在第二时钟域的时钟处的同步脉冲的时间位置的同步脉冲周期持续时间信息。 先入先出存储被配置为与第一时钟域同步地接收输入数据值,并且响应于当前同步脉冲提供与第二时钟域同步的输出数据值。 同步脉冲发生器用第二时钟域的时钟计时,并被配置为产生后续的同步脉冲,使得随后的同步脉冲位于由同步脉冲周期持续时间信息描述的时间位置。 填充级别信息提供者被配置为提供描述先进先出存储器的填充级别的填充级别信息。 反馈路径被配置为将填充水平信息反馈到计算器,该计算器还被配置为基于填充水平信息来调整同步脉冲周期持续时间信息。