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    Central processing unit start-up circuit of portable electronic devices
    1.
    发明授权
    Central processing unit start-up circuit of portable electronic devices 有权
    便携式电子设备的中央处理单元启动电路

    公开(公告)号：US08214667B2

    公开(公告)日：2012-07-03

    申请号：US12605693

    申请日：2009-10-26

    申请人： Wan-Ning Li ,  Ying-Zheng Li

    发明人： Wan-Ning Li ,  Ying-Zheng Li

    IPC分类号： G06F1/26

    CPC分类号： G06F1/263 ,  G06F1/24

    摘要： A central processing unit (CPU) start-up circuit for controlling a CPU of a portable electronic device includes a power management unit (PMU) connected to the CPU, an awaking circuit connected to the CPU, and a main power supply connected to the CPU, the PMU and the awaking circuit. The main power supply provides working electric power to the CPU, the PMU detects the status of the main power supply and generates a status signal (SS) according to the detecting result, the awaking circuit detects the status of the main power supply and generates a waking signal (WS) according to the detecting result, and the SS and the WS are both transmitted to the CPU to cooperatively control the CPU to be switched on and switched off.

    摘要翻译： 用于控制便携式电子设备的CPU的中央处理单元（CPU）启动电路包括连接到CPU的电源管理单元（PMU），连接到CPU的唤醒电路和连接到CPU的主电源 ，PMU和唤醒电路。 主电源为CPU提供工作电力，PMU检测主电源的状态，并根据检测结果生成状态信号（SS），唤醒电路检测主电源的状态，并产生 唤醒信号（WS），SS和WS都发送到CPU，以协调控制CPU被接通和关闭。