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为了构建以Intel XscaleR270处理器为基础的一个嵌入式应用系统的电源管理方案,分析了包括CPU在内的各个功能模块的电压和功率需求,以及处理器的各供电域的上电复位时序要求,结合各种电压调节器的优缺点,并简化处理了CPU的电源管理信号的运用.实现了一种低成本的分立单独的电压稳压器的系统电压管理方案,同时可满足基本的上电时序要求.采用滞回,充电管理芯片和受控开关共同完成对锂电池和外电的管理.
In order to build a power management scheme of an embedded application system based on Intel XscaleR270 processor, the voltage and power requirements of each functional module including the CPU and the power-on reset timing requirements of each power domain of the processor are analyzed. Combined with the advantages and disadvantages of various voltage regulators and simplifies the use of CPU power management signals to achieve a low-cost discrete voltage regulator voltage regulator system, while meeting the basic power-on timing Requirements. Hysteresis, charge management chip and the controlled switch to complete the management of lithium batteries and external power.