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    • 6. 发明授权
    • Logic block control architectures for programmable logic devices
    • 用于可编程逻辑器件的逻辑块控制架构
    • US07397276B1
    • 2008-07-08
    • US11446351
    • 2006-06-02
    • Om P. AgrawalXiaojie HeSajitha WijesuriyaBarry BrittonMing H. DingJun Zhao
    • Om P. AgrawalXiaojie HeSajitha WijesuriyaBarry BrittonMing H. DingJun Zhao
    • H03K19/177
    • H03K19/17736H03K19/17728
    • Systems and methods are disclosed herein to provide logic block slice architectures and programmable logic block architectures along with control logic architectures in accordance with embodiments of the present invention. For example, in accordance with an embodiment of the present invention, a programmable logic device includes a plurality of programmable logic blocks and a plurality of logic block slices within each of the programmable logic blocks, with each of the logic block slices having at least a first and a second slice each having at least a first lookup table. At least one of the programmable logic blocks includes at least a first logic block slice, a second logic block slice, and a third logic block slice, with the first logic block slice being a logic block slice type different from the second logic block slice, and the third logic block slice being a logic block slice type different from the first and second logic block slices. Control logic provides at a programmable logic block level bundled and/or unbundled control signals at a logic block slice level for at least two of the logic block slices.
    • 本文公开了系统和方法,以根据本发明的实施例提供逻辑块片段架构和可编程逻辑块架构以及控制逻辑架构。 例如,根据本发明的实施例,可编程逻辑器件包括多个可编程逻辑块和每个可编程逻辑块内的多个逻辑块片,每个逻辑块片段具有至少一个 第一片和第二片,每片具有至少第一查找表。 至少一个可编程逻辑块至少包括第一逻辑块片段,第二逻辑块片段和第三逻辑块片段,其中第一逻辑块片段是不同于第二逻辑块片段的逻辑块片段类型, 并且第三逻辑块片是不同于第一和第二逻辑块片段的逻辑块片段类型。 逻辑块片段中的至少两个逻辑块片级的控制逻辑在逻辑块片级提供捆绑和/或非捆绑控制信号的可编程逻辑块级。
    • 10. 发明授权
    • Programmable logic device with a double data rate SDRAM interface
    • 具有双数据速率SDRAM接口的可编程逻辑器件
    • US07342838B1
    • 2008-03-11
    • US11165853
    • 2005-06-24
    • Brad Sharpe-GeislerOm P. AgrawalKiet TruongGiap TranBai Nguyen
    • Brad Sharpe-GeislerOm P. AgrawalKiet TruongGiap TranBai Nguyen
    • G11C7/00
    • G06F13/4243
    • Within a programmable logic device (PLD), a DDR SDRAM interface for a DDR SDRAM is provided, the DDR SDRAM providing data to the PLD on the rising and falling edges of a DQS signal, the interface including: a first register adapted to capture data associated with the falling edges of the DQS signal; a second register adapted to capture data associated with the rising edges of the DQS signal; and clock edge selection logic circuitry coupled to clock inputs of the first and second registers and adapted to select between the rising or falling clock edges of an internal PLD clock to clock the first and second registers and thereby transfer the captured data into core logic for the PLD, the selection of the clock edge based on a phase relationship between the internal PLD clock and the DQS signal.
    • 在可编程逻辑器件(PLD)中,提供用于DDR SDRAM的DDR SDRAM接口,DDR SDRAM在DQS信号的上升沿和下降沿向PLD提供数据,该接口包括:适于捕获数据的第一寄存器 与DQS信号的下降沿相关联; 第二寄存器,其适于捕获与所述DQS信号的上升沿相关联的数据; 以及时钟沿选择逻辑电路,其耦合到第一和第二寄存器的时钟输入,并且适于在内部PLD时钟的上升沿或下降时钟沿之间进行选择,以对第一和第二寄存器进行时钟,从而将捕获的数据传输到核心逻辑 PLD,根据内部PLD时钟和DQS信号之间的相位关系选择时钟沿。