Reducing I/O noise when leaving programming mode
    1.
    发明授权
    Reducing I/O noise when leaving programming mode 有权
    离开编程模式时减少I / O噪声

    公开(公告)号:US06242941B1

    公开(公告)日:2001-06-05

    申请号:US09320858

    申请日:1999-05-26

    IPC分类号: H03K1716

    CPC分类号: H03K19/00346

    摘要: An integrated circuit contains circuitry to operate in such a fashion to reduce output noise when switching output circuits from a programming mode to a user mode. In an implementation, the integrated circuit (125) is configurable in the programming mode with user configuration data. In the user mode, the integrated circuit will operate with the functionality as defined by the user during the programming mode. When switching from the programming mode to the user mode, each output (210) of the integrated circuit will switch to its user mode value. In order to minimize switching noise, the outputs are released to their user mode values not all at the same time.

    摘要翻译: 集成电路包含以这种方式操作以在将输出电路从编程模式切换到用户模式时降低输出噪声的电路。 在实现中,集成电路(125)可以在具有用户配置数据的编程模式下配置。 在用户模式下,集成电路将以编程模式下用户定义的功能运行。 当从编程模式切换到用户模式时,集成电路的每个输出(210)将切换到其用户模式值。 为了最小化开关噪声,输出不会全部被释放到用户模式值。

    Programmable control circuit for grounding unused outputs
    2.
    发明授权
    Programmable control circuit for grounding unused outputs 有权
    可编程控制电路,用于接地未使用的输出

    公开(公告)号:US06363505B1

    公开(公告)日:2002-03-26

    申请号:US09323302

    申请日:1999-06-01

    IPC分类号: G01R3128

    CPC分类号: G01R31/3185

    摘要: A circuit for programmably grounding (or coupling to the positive rail) unused outputs to improve noise immunity of the circuit. The circuit of the present invention achieves, for example, programmable grounding of an output via already existing test signal paths, without introducing delays in speed critical output signal paths.

    摘要翻译: 用于可编程地接地(或耦合到正轨)的未使用输出的电路,以提高电路的抗噪声能力。 本发明的电路例如通过已经存在的测试信号路径实现输出的可编程接地,而不会在速度关键输出信号路径中引入延迟。