Integrated power supply scheme for powering memory card host interface

    公开(公告)号:US10387690B2

    公开(公告)日:2019-08-20

    申请号:US15493973

    申请日:2017-04-21

    Abstract: This invention is an SOC with an integrated single rail power supply that interfaces with the host controller and dynamically changes the host interface supply to 3.3 volts or 1.8 volts based on the sensed card speed grade. The SOC initially selects 3.3 volts to supply to the memory card. The SOC communicates with memory card vis input/output circuits to determine a memory type. The controller selects a 3.3 volt or 1.8 volt supply for the memory card based upon the determination. The SOC powers the input/output circuits at the same supply voltage as the memory card. This invention employs 1.8 volt transistors in the input/output circuits using a bias voltage to protect these transistor from the full 3.3 volt power when the memory card is powered to 3.3 volts.

    Fail-Safe I/O to Achieve Ultra Low System Power
    18.
    发明申请
    Fail-Safe I/O to Achieve Ultra Low System Power 审中-公开
    故障安全I / O实现超低系统功耗

    公开(公告)号:US20160351247A1

    公开(公告)日:2016-12-01

    申请号:US15236797

    申请日:2016-08-15

    Abstract: The disclosure provides an input/output (IO) circuit powered by an input/output (IO) supply voltage. The IO circuit includes a cutoff circuit that receives a first invert signal, the IO supply voltage, a bias voltage and a pad voltage. An output stage is coupled to the cutoff circuit. The output stage receives a first signal, a second signal and the bias voltage. A pad is coupled to the output stage, and a voltage generated at the pad is the pad voltage. The cutoff circuit and the output stage maintain the pad voltage at logic high when the IO supply voltage transition below a defined threshold.

    Abstract translation: 本公开提供了由输入/输出(IO)电源电压供电的输入/输出(IO)电路。 IO电路包括接收第一反相信号,IO电源电压,偏置电压和焊盘电压的截止电路。 输出级与断路电路相连。 输出级接收第一信号,第二信号和偏置电压。 焊盘耦合到输出级,并且在焊盘处产生的电压是焊盘电压。 当IO电源电压转换低于定义的阈值时,截止电路和输出级将焊盘电压保持在逻辑高电平。

    Valid context status retention in processor power mode management
    19.
    发明授权
    Valid context status retention in processor power mode management 有权
    处理器电源模式管理中的有效上下文状态保留

    公开(公告)号:US09471140B2

    公开(公告)日:2016-10-18

    申请号:US14304795

    申请日:2014-06-13

    Abstract: A system having multiple power mode types, for example, includes a power manager that is responsive to a selection of a suspend power mode type for maintaining processor context information in volatile memory while the processor is in the selected suspend mode. A status register is arranged to retain the status of the context information in the volatile memory while the processor is in the selected suspend power mode. The power manager is arranged to selectively apply power to various voltage domains in response to the type of power mode selected. The processor is optionally arranged to signal the power manager of transitions to the selected suspend mode and of transitions to an active mode using a power enable signal.

    Abstract translation: 例如,具有多个功率模式类型的系统包括功率管理器,该功率管理器响应于在处理器处于所选择的挂起模式时在易失性存储器中维持处理器上下文信息的暂停功率模式类型的选择。 状态寄存器被布置成在处理器处于选择的挂起电源模式时将上下文信息的状态保持在易失性存储器中。 功率管理器被布置为响应于所选择的功率模式的类型选择性地向各个电压域施加功率。 处理器可选地布置成使用功率使能信号向功率管理器发信号通知转换到所选择的暂停模式和转换到活动模式。

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