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    • 6. 发明授权
    • FPGA architecture including direct logic function circuit to I/O
interconnections
    • FPGA架构包括I / O互连的直接逻辑功能电路
    • US5509128A
    • 1996-04-16
    • US140724
    • 1993-10-20
    • King W. Chan
    • King W. Chan
    • H01L27/118H01L21/82H03K19/177G06F13/00
    • H03K19/17744H03K19/17704
    • A user-programmable FPGA architecture includes a plurality of logic function circuits having inputs and outputs disposed on an integrated circuit. A plurality of input/output (I/O) modules are also disposed on the integrated circuit and communicate with I/O pads on the integrated circuit. The I/O modules each include: (1) an input buffer having an input connected to an I/O pad on the integrated circuit and an output connected to an output node, and (2) an output buffer having an input connected to an input node, an output connected to the I/O pad, and a control input connected to a control node for placing the output buffer into a high impedance state. A general interconnect structure disposed on the integrated circuit includes a plurality of interconnect conductors which may be connected to one another, to the inputs and outputs of the logic function circuits, and to the I/O modules by programming user-programmable interconnect elements. Direct interconnections are made between the inputs of selected ones of the logic function circuits and the output nodes of selected ones of the I/O modules. Direct interconnections are made between the outputs of selected ones of the logic function circuits and the input nodes of selected ones of the I/O modules. Direct interconnections are made between the outputs of selected ones of the logic function circuits and the control nodes of selected ones of the I/O modules.
    • 用户可编程FPGA架构包括多个具有设置在集成电路上的输入和输出的逻辑功能电路。 多个输入/输出(I / O)模块也布置在集成电路上并与集成电路上的I / O焊盘通信。 I / O模块各自包括:(1)输入缓冲器,其具有连接到集成电路上的I / O焊盘的输入端和连接到输出节点的输出,以及(2)输出缓冲器,其输入端连接到 输入节点,连接到I / O焊盘的输出,以及连接到控制节点的控制输入,用于将输出缓冲器置于高阻抗状态。 设置在集成电路上的通用互连结构包括可以彼此连接的多个互连导体,逻辑功能电路的输入和输出,以及通过编程用户可编程的互连元件到I / O模块。 在所选择的逻辑功能电路的输入和I / O模块中所选择的输出节点之间进行直接互连。 在所选择的逻辑功能电路的输出和所选择的I / O模块的输入节点之间进行直接互连。 在所选逻辑功能电路的输出和所选择的I / O模块的控制节点之间进行直接互连。