PROGRAMMABLE HIGH-SPEED INTERFACE
    31.
    发明申请
    PROGRAMMABLE HIGH-SPEED INTERFACE 有权
    可编程高速接口

    公开(公告)号:US20080186056A1

    公开(公告)日:2008-08-07

    申请号:US11830831

    申请日:2007-07-30

    IPC分类号: H03K19/0175

    摘要: Methods and apparatus for providing either high-speed, or lower-speed, flexible inputs and outputs. An input and output structure having a high-speed input, a high-speed output, a low or moderate speed input, and an low or moderate speed output is provided. One of the input and output circuits are selected and the others are deselected. The high-speed input and output circuits are comparatively simple, in one example having only a clear signal for a control line input, and are able to interface to lower speed circuitry inside the core of an integrated circuit. The low or moderate speed input and output circuits are more flexible, for example, having preset, enable, and clear as control line inputs, and are able to support JTAG boundary testing. These parallel high and lower speed circuits are user selectable such that the input output structure is optimized between speed and functionality depending on the requirements of the application.

    摘要翻译: 提供高速或低速灵活的输入和输出的方法和设备。 提供具有高速输入,高速输出,低速或中速输入以及低速或中速输出的输入和输出结构。 选择其中一个输入和输出电路,并取消选择其他电路。 高速输入和输出电路相当简单,在一个示例中,仅具有用于控制线路输入的清除信号,并且能够与集成电路的核心内的低速电路接口。 低速或中速输入和输出电路比较灵活,例如具有预置,使能和清除作为控制线路输入,并且能够支持JTAG边界测试。 这些并行高速和低速电路是用户可选择的,使得输入输出结构根据应用的要求在速度和功能之间进行优化。

    Multiple data rate interface architecture
    32.
    发明授权
    Multiple data rate interface architecture 有权
    多数据速率接口架构

    公开(公告)号:US07167023B1

    公开(公告)日:2007-01-23

    申请号:US11059299

    申请日:2005-02-15

    IPC分类号: H01L25/00 H03K19/177

    摘要: Method and circuitry for implementing high speed multiple-data-rate interface architectures for programmable logic devices. The invention partitions I/O pins and their corresponding registers into independent multiple-data rate I/O modules each having at least one pin dedicated to the strobe signal DQS and others to DQ data signals. The modular architecture facilitates pin migration from one generation of PLDs to the next larger generation.

    摘要翻译: 用于实现可编程逻辑器件的高速多数据速率接口架构的方法和电路。 本发明将I / O引脚及其对应的寄存器分为独立的多数据速率I / O模块,每个I / O引脚具有至少一个专用于选通信号DQS的引脚和其他引脚用于DQ数据信号。 模块化架构便于引脚从一代PLD迁移到下一代。

    Multiple data rate interface architecture
    33.
    发明授权
    Multiple data rate interface architecture 有权
    多数据速率接口架构

    公开(公告)号:US06806733B1

    公开(公告)日:2004-10-19

    申请号:US10038737

    申请日:2002-01-02

    IPC分类号: H03K19177

    CPC分类号: H03K19/1774 H03K19/17744

    摘要: Method and circuitry for implementing high speed multiple-data-rate interface architectures for programmable logic devices. The invention partitions I/O pins and their corresponding registers into independent multiple-data rate I/O modules each having at least one pin dedicated to the strobe signal DQS and others to DQ data signals. The modular architecture facilitates pin migration from one generation of PLDs to the next larger generation.

    摘要翻译: 用于实现可编程逻辑器件的高速多数据速率接口架构的方法和电路。 本发明将I / O引脚及其对应的寄存器分为独立的多数据速率I / O模块,每个I / O引脚具有至少一个专用于选通信号DQS的引脚和其他引脚用于DQ数据信号。 模块化架构便于引脚从一代PLD迁移到下一代。

    Phase-locked loop or delay-locked loop circuitry for programmable logic devices
    34.
    发明授权
    Phase-locked loop or delay-locked loop circuitry for programmable logic devices 有权
    用于可编程逻辑器件的锁相环或延迟锁定环电路

    公开(公告)号:US06437650B1

    公开(公告)日:2002-08-20

    申请号:US09855865

    申请日:2001-05-15

    IPC分类号: H03L706

    摘要: A programmable logic device is provided with phase-locked loop (“PLL”) or delay-locked loop (“DLL”) circuitry in which the feedback loop circuitry substantially parallels and duplicates a portion of the clock signal distribution network on the device that receives the main PLL/DLL output signal. In this way the distributed feedback loop circuit more readily provides a substantially exact match for the distributed delay experienced by the signal propagating through the clock signal distribution network that the PLL/DLL circuitry serves.

    摘要翻译: 可编程逻辑器件提供有锁相环(“PLL”)或延迟锁定环(“DLL”)电路,其中反馈回路电路在接收的设备上基本平行并复制时钟信号分配网络的一部分 主PLL / DLL输出信号。 以这种方式,分布式反馈环路更容易地提供对通过PLL / DLL电路服务的时钟信号分配网络传播的信号经历的分布延迟的基本精确的匹配。

    Programmable logic device input/output circuit configurable as reference voltage input circuit
    35.
    发明授权
    Programmable logic device input/output circuit configurable as reference voltage input circuit 有权
    可编程逻辑器件输入/输出电路可配置为参考电压输入电路

    公开(公告)号:US06346827B1

    公开(公告)日:2002-02-12

    申请号:US09366937

    申请日:1999-08-04

    IPC分类号: H01L2500

    CPC分类号: G11C5/147 G11C5/066

    摘要: A programmable input/output circuit for a programmable logic device input/output pin can be configured in a standard I/O mode, or in a reference voltage mode. The circuit includes a tristatable, but otherwise standard I/O buffer as well as a reference voltage clamp circuit. In reference voltage mode, the I/O circuit is tristated, and the reference voltage clamp circuit passes a reference voltage from the I/O pin to a reference voltage bus. In standard I/O mode, the I/O buffer is operational. The reference voltage clamp circuit isolates the I/O pin from the reference voltage bus and may include undervoltage and overvoltage protection to prevent disturbance of the reference voltage bus by an out-of-range I/O signal.

    摘要翻译: 可编程逻辑器件输入/输出引脚的可编程输入/输出电路可以在标准I / O模式或参考电压模式下进行配置。 该电路包括可跟踪的标准I / O缓冲器以及参考电压钳位电路。 在参考电压模式下,I / O电路被三态化,参考电压钳位电路将参考电压从I / O引脚传递到参考电压总线。 在标准I / O模式下,I / O缓冲区可以运行。 参考电压钳位电路将I / O引脚与参考电压总线隔离,并可能包括欠压和过压保护,以防止参考电压总线受到超出范围I / O信号的干扰。

    Programmable output buffer
    36.
    发明授权
    Programmable output buffer 有权
    可编程输出缓冲器

    公开(公告)号:US08531205B1

    公开(公告)日:2013-09-10

    申请号:US13363108

    申请日:2012-01-31

    IPC分类号: H03K17/16

    摘要: One embodiment relates to a programmable output buffer which includes first and second programmable variable-impedance single-ended driver circuits and first and second termination circuits. The first termination circuit is coupled to a first output pin which is driven by the first programmable variable-impedance single-ended driver circuit, and the second termination circuit is coupled to a second output pin which is driven by the second programmable variable-impedance single-ended driver circuit. The first and second termination circuits are programmable to either provide parallel termination for a differential signal or drive single-ended signals with the parallel termination turned off. Other embodiments and features are also disclosed.

    摘要翻译: 一个实施例涉及可编程输出缓冲器,其包括第一和第二可编程可变阻抗单端驱动器电路以及第一和第二终端电路。 第一终端电路耦合到由第一可编程可变阻抗单端驱动电路驱动的第一输出引脚,第二终端电路耦合到由第二可编程可变阻抗单端驱动的第二输出引脚 驱动电路。 第一和第二终端电路是可编程的,以提供用于差分信号的并行终端或者并联终端关断的驱动单端信号。 还公开了其它实施例和特征。

    Multiple data rate interface architecture
    37.
    发明授权
    Multiple data rate interface architecture 有权
    多数据速率接口架构

    公开(公告)号:US08098082B1

    公开(公告)日:2012-01-17

    申请号:US12954204

    申请日:2010-11-24

    IPC分类号: H01L25/00 H03K19/177

    摘要: Method and circuitry for implementing high speed multiple-data-rate interface architectures for programmable logic devices. The invention partitions I/O pins and their corresponding registers into independent multiple-data rate I/O modules each having at least one pin dedicated to the strobe signal DQS and others to DQ data signals. The modular architecture facilitates pin migration from one generation of PLDs to the next larger generation.

    摘要翻译: 用于实现可编程逻辑器件的高速多数据速率接口架构的方法和电路。 本发明将I / O引脚及其对应的寄存器分为独立的多数据速率I / O模块,每个I / O引脚具有至少一个专用于选通信号DQS的引脚和其他引脚用于DQ数据信号。 模块化架构便于引脚从一代PLD迁移到下一代。

    Multiple data rate interface architecture
    38.
    发明授权
    Multiple data rate interface architecture 有权
    多数据速率接口架构

    公开(公告)号:US07859304B1

    公开(公告)日:2010-12-28

    申请号:US12329553

    申请日:2008-12-06

    IPC分类号: H01L25/00 H03K19/177

    摘要: Method and circuitry for implementing high speed multiple-data-rate interface architectures for programmable logic devices. The invention partitions I/O pins and their corresponding registers into independent multiple-data rate I/O modules each having at least one pin dedicated to the strobe signal DQS and others to DQ data signals. The modular architecture facilitates pin migration from one generation of PLDs to the next larger generation.

    摘要翻译: 用于实现可编程逻辑器件的高速多数据速率接口架构的方法和电路。 本发明将I / O引脚及其对应的寄存器分为独立的多数据速率I / O模块,每个I / O引脚具有至少一个专用于选通信号DQS的引脚和其他引脚用于DQ数据信号。 模块化架构便于引脚从一代PLD迁移到下一代。

    DQS postamble filtering
    40.
    发明授权
    DQS postamble filtering 失效
    DQS后同步码过滤

    公开(公告)号:US07031222B1

    公开(公告)日:2006-04-18

    申请号:US11046007

    申请日:2005-01-28

    IPC分类号: G11C8/00

    摘要: Circuits, methods, and apparatus for filtering signals at a high-speed data interface. One exemplary embodiment is particularly configured to filter a clock signal at the end of a data burst received by a double-data rate memory interface. A clock input port is either connected or disconnected to an input cell. When a data burst is to be received, the clock input port is connected to the input cell. When the data burst concludes, the clock input port is disconnected from the input cell. In a specific embodiment, a signal is received indicating that a data burst is about to begin and the clock input port is connected to the input cell. The signal later changes state indicating that the last data bit is being received. When the last clock edge corresponding to the last data bit is received, the clock input port is disconnected from the input cell.

    摘要翻译: 用于在高速数据接口处过滤信号的电路,方法和装置。 一个示例性实施例被特别地配置为在由双数据速率存储器接口接收的数据突发结束时对时钟信号进行滤波。 时钟输入端口与输入单元连接或断开。 当接收到数据脉冲串时,时钟输入端口连接到输入单元。 当数据突发结束时,时钟输入端口与输入单元断开连接。 在具体实施例中,接收到指示数据脉冲串即将开始并且时钟输入端口连接到输入单元的信号。 该信号随后改变指示正在接收最后一个数据位的状态。 当接收到与最后一个数据位相对应的最后一个时钟沿时,时钟输入端口与输入单元断开。