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  • Reset and clock control (RCC) STM32L

    Reset:

    1、系统复位:A system reset sets all registers to their reset values except for the RTC, RTC backup
    registers and control/status register, RCC_CSR

          复位源查看:RCC_CSR

          Option byte loader:STM32L15xxx Flash programming manual (PM0062)

    2、Power Reset:A power reset sets all registers to their reset values including for the RTC domain

    3、RTC and backup registers reset:

    复位源:A software reset, triggered by setting the RTCRST bit in the RCC_CSR register

    Power reset (BOR/POR/PDR)

    Clocks:

    各时钟的特点:

    1、HSE:高精度

    2、HSI:低成本,比HSE具有更快的启动时间

    3、MSI:复位、唤醒时。MSI为系统时钟。

    降低功耗和唤醒时间

    4、PLL:provide a 48 MHz clock to the USB or SDIO。为VCORE的各个range进行倍频

    5、LSE:低功耗,高精度。用于RTC/日历、定时等

    6、LSI:低功耗。停止待机模式下为IWDG提供时钟

    系统时钟源:HSI,HSE,PLL,MSI

    时钟安全系统:当外部时钟失效时採取对应措施以保护应用的执行

    RTC与LCD的时钟源:LSE或LSI

    Watchdog clock:LSI

    MCO:时钟输出pin(PA8)

    时钟的測量:TIM9/TIM10/TIM11



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  • 原文地址:https://www.cnblogs.com/bhlsheji/p/5116233.html
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