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    • 15. 发明申请
    • BIT SHADOWING IN A MEMORY SYSTEM
    • 记忆系统中的位冲突
    • US20100005345A1
    • 2010-01-07
    • US12165799
    • 2008-07-01
    • Frank D. FerraioloDaniel M. DrepsKevin C. GowerRobert J. Reese
    • Frank D. FerraioloDaniel M. DrepsKevin C. GowerRobert J. Reese
    • G06F11/00
    • G06F11/167G06F11/073G06F11/076G06F11/1004G06F11/2007G11C5/04G11C29/02G11C29/022
    • A communication interface device, system, method, and design structure for bit shadowing in a memory system are provided. The communication interface device includes shadow selection logic to select a driver bit position as a shadowed driver value, and line drivers to transmit data for the selected driver bit position and the shadowed driver value on separate link segments of a bus. The communication interface device also includes shadow compare logic to compare a selected received value with a shadowed received value from the bus and identify a miscompare in response to a mismatch of the compare, and shadow counters to count a rate of the miscompare relative to a bus error rate over a period of time. A defective link segment is identified in response to the rate of the miscompare within a predefined threshold of the bus error rate.
    • 提供了一种用于存储器系统中的位阴影的通信接口设备,系统,方法和设计结构。 通信接口设备包括用于选择驱动器位位置作为阴影驱动器值的阴影选择逻辑,以及线驱动器,以在总线的单独链路段上传送所选择的驱动器位位置和阴影驱动器值的数据。 通信接口设备还包括阴影比较逻辑,以将所选择的接收值与来自总线的阴影接收值进行比较,并且识别响应于比较不匹配的错误比较,以及阴影计数器来计数相对于总线的误比率 错误率在一段时间内。 响应于在总线错误率的预定阈值内的错误比较的速率来识别有缺陷的链路段。
    • 16. 发明授权
    • Elastic interface de-skew mechanism
    • 弹性界面去歪斜机制
    • US07461287B2
    • 2008-12-02
    • US11055866
    • 2005-02-11
    • Daniel M. DrepsFrank D. FerraioloGary A. PetersonRobert J. Reese
    • Daniel M. DrepsFrank D. FerraioloGary A. PetersonRobert J. Reese
    • G06F1/04G06F13/42
    • G06F5/06G06F1/10
    • A mechanism for de-skewing and aligning data bits sent between two chips on an elastic interface. On the receiving end of an elastic interface, the eye of each data bit within a clock/data group is delayed by less than a bit time to align the eyes with the nearest clock edge of a received clock signal. In addition to aligning the eyes of the individual data bits with the nearest clock edge, IAP patterns are used to determine the amount of further delay needed to line up the individual data beats from each data bit. If the data beats for the data bits are not aligned, all but the slowest data beat are delayed to align the data beats for all bits. The additional delay is achieved using sample latches that result in a delayed signal with less jitter. As a result of having less jitter, the received, de-skewed, and aligned clock/data group can be forwarded to the operative portion of the receiving chip at an increased frequency.
    • 用于在弹性界面上在两个芯片之间发送的数据位的偏斜和对准的机制。 在弹性接口的接收端,时钟/数据组内的每个数据位的眼睛被延迟小于一点时间,以使眼睛与接收到的时钟信号的最近的时钟沿对齐。 除了将各个数据位的眼睛与最近的时钟边沿对齐之外,还使用IAP模式来确定从每个数据位排列各个数据节拍所需的进一步延迟量。 如果数据位的数据跳转不对齐,除了最慢的数据跳转之外,除了所有位的数据跳转之外,都会被延迟。 使用采样锁存器实现额外的延迟,导致延迟信号抖动较小。 由于具有较少的抖动,所接收的,去偏斜的和对准的时钟/数据组可以以增加的频率转发到接收芯片的操作部分。
    • 19. 发明授权
    • Alignment mode selection mechanism for elastic interface
    • 弹性界面对准模式选择机构
    • US07443940B2
    • 2008-10-28
    • US11055841
    • 2005-02-11
    • Frank D. FerraioloGary A. PetersonRobert J. Reese
    • Frank D. FerraioloGary A. PetersonRobert J. Reese
    • H04L25/00
    • G11C19/287G06F5/10G06F2205/104
    • Methods and apparatus are disclosed for aligning received data bits in elastic interface systems. Depending upon which one of several alignment modes is selected, data bits can be loaded into FIFO latches on rising clock edges if the data was sent on rising clock edges, on falling clock edges if the data was sent on falling clock edges, or on the nearest clock edge if minimum latency is desired. Alternatively, data bits can be delayed by one or more bit times before loading into FIFO latches to reduce the elastic interface system's sensitivity to drift. The present invention permits a user to trade off factors related to for latency, drift, and skew by choosing among different alignment modes in an elastic interface system.
    • 公开了用于在弹性界面系统中对准接收数据位的方法和装置。 根据选择的几种对准模式中的哪一种,如果数据在上升时钟沿发送,则数据位可以在上升时钟沿加载到FIFO锁存器中,如果数据在下降时钟沿发送,则在下降时钟沿 如果需要最小延迟,则为最近的时钟沿。 或者,数据位可以在加载到FIFO锁存器之前延迟一个或多个位时间,以减少弹性接口系统对漂移的敏感度。 本发明允许用户通过在弹性接口系统中的不同对准模式之间进行选择来折衷与延迟,漂移和偏斜相关的因素。