Method and circuit for providing a system level reset function for an electronic device
    2.
    发明授权
    Method and circuit for providing a system level reset function for an electronic device 有权
    为电子设备提供系统电平复位功能的方法和电路

    公开(公告)号:US07089133B1

    公开(公告)日:2006-08-08

    申请号:US10942523

    申请日:2004-09-15

    IPC分类号: G06F19/00 G06F1/24

    CPC分类号: G06F1/24

    摘要: A method and circuit provide a system level reset function for an electronic device. An initial reset function is provided under a low voltage condition of supply voltage, such as occur upon first energizing the electronic device. A tunable reset function is also provided, which can first be asserted at a voltage level setting less precise than that setting becomes upon tuning. Further, a boot-up reset function is provided, which provides its reset function at a voltage level setting that is set according to a calibration. Calibration can be based on data stored in a non-volatile memory, and can involve a checksum operation. The electronic device, a microcontroller for instance, is held in a reset state with any of the initial, tunable, and boot-up reset functions.

    摘要翻译: 方法和电路为电子设备提供系统级复位功能。 在电源电压的低电压条件下提供初始复位功能,例如在电子设备首次通电时发生。 还提供了可调谐复位功能,其可以首先在比调谐时设置的精度低的电压电平设置下被断言。 此外,提供启动复位功能,其提供其按照校准设置的电压电平设置的复位功能。 校准可以基于存储在非易失性存储器中的数据,并且可以涉及校验和操作。 例如,电子设备(例如微控制器)被保持在具有任何初始,可调谐和启动复位功能的复位状态。

    Multifunction input/output circuit
    7.
    发明授权
    Multifunction input/output circuit 有权
    多功能输入/输出电路

    公开(公告)号:US08217700B1

    公开(公告)日:2012-07-10

    申请号:US12496590

    申请日:2009-07-01

    IPC分类号: H03L5/00

    CPC分类号: H03K19/1732

    摘要: In one example, a chip includes integrated components configured to operate in the digital domain and the analog domain. An I/O pad located on the chip is configured to provide an external device access to the integrated components. A multifunction I/O interface cell between the I/O pad and the integrated components is configured to selectively connect different combinations of the components to the same I/O pad at different times. The multifunction I/O interface cell may include a first switching device connected to ground, a second switching device connected to a reference voltage, an analog input/output buffer, and a digital input/output buffer.

    摘要翻译: 在一个示例中,芯片包括被配置为在数字域和模拟域中操作的集成组件。 位于芯片上的I / O焊盘被配置为提供对集成部件的外部设备访问。 I / O焊盘和集成组件之间的多功能I / O接口单元被配置为在不同时间有选择地将组件的不同组合连接到相同的I / O焊盘。 多功能I / O接口单元可以包括连接到地的第一开关器件,连接到参考电压的第二开关器件,模拟输入/输出缓冲器和数字输入/输出缓冲器。

    Analog switching system for low cross-talk
    9.
    发明授权
    Analog switching system for low cross-talk 有权
    用于低串扰的模拟开关系统

    公开(公告)号:US08143934B1

    公开(公告)日:2012-03-27

    申请号:US12496580

    申请日:2009-07-01

    IPC分类号: H03K17/00

    摘要: A system includes a voltage pump to generate a first pump voltage from an analog voltage signal. The system further includes switching pad to receive an analog signal from an external source and route the analog signal to analog processing circuitry over one or more analog signal busses based on the first pump voltage and the analog voltage signal.

    摘要翻译: 系统包括电压泵,以从模拟电压信号产生第一泵电压。 该系统还包括切换焊盘以从外部源接收模拟信号,并且基于第一泵浦电压和模拟电压信号将模拟信号路由到一个或多个模拟信号总线上的模拟处理电路。