{"id":90702,"date":"2026-08-05T21:16:55","date_gmt":"2026-08-05T13:16:55","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/90702.html"},"modified":"2026-08-05T21:16:55","modified_gmt":"2026-08-05T13:16:55","slug":"stm32f407-%e6%97%b6%e9%92%9f%e7%b3%bb%e7%bb%9f%e8%b6%85%e8%af%a6%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/90702.html","title":{"rendered":"STM32F407 \u65f6\u949f\u7cfb\u7edf\u8d85\u8be6\u89e3"},"content":{"rendered":"<p>STM32 \u6240\u6709\u5916\u8bbe\u3001\u603b\u7ebf\u3001\u5185\u6838\u3001\u5b9a\u65f6\u5668\u3001\u4e32\u53e3\u3001ADC\u3001DMA\u3001\u7cfb\u7edf\u5ef6\u65f6\u5168\u90e8\u4f9d\u8d56\u65f6\u949f\u9a71\u52a8\u3002\u65f6\u949f\u662f\u5355\u7247\u673a\u8fd0\u884c\u7684\u6839\u57fa&#xff0c;\u65f6\u949f\u914d\u7f6e\u9519\u8bef\u4f1a\u51fa\u73b0&#xff1a;\u4e32\u53e3\u4e71\u7801\u3001\u5b9a\u65f6\u5668\u5b9a\u65f6\u4e0d\u51c6\u3001ADC\u91c7\u6837\u6f02\u79fb\u3001HAL_Delay \u5ef6\u65f6\u9519\u8bef\u3001\u4f4e\u529f\u8017\u964d\u4e0d\u4e0b\u7535\u6d41\u3001\u82af\u7247\u6b7b\u673a\u3001USB\u65e0\u6cd5\u8bc6\u522b\u7b49\u7591\u96be\u95ee\u9898\u3002<\/p>\n<p>\u6574\u4f53\u552f\u4e00\u4fe1\u53f7\u6d41\u5411&#xff1a;\u65f6\u949f\u6e90 \u2192 PLL\u9501\u76f8\u73af\u500d\u9891 \u2192 SYSCLK\u7cfb\u7edf\u5185\u6838\u65f6\u949f \u2192 AHB\u9884\u5206\u9891 \u2192 HCLK\u603b\u7ebf\u65f6\u949f \u2192 APB1\/APB2\u9884\u5206\u9891 \u2192 PCLK\u5916\u8bbe\u65f6\u949f \u2192 \u5916\u8bbe\u65f6\u949f\u95e8\u63a7 \u2192 \u5916\u8bbe\u5de5\u4f5c<\/p>\n<h3>\u4e00\u3001STM32F407 \u5b8c\u6574\u5b98\u65b9\u65f6\u949f\u6811<\/h3>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"285\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/08\/20260805131654-6a7337c6b8127.png\" width=\"730\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"760\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/08\/20260805131654-6a7337c6c9ae6.png\" width=\"663\" \/><\/p>\n<h3>\u4e8c\u3001\u4e94\u5927\u65f6\u949f\u6e90 \u6df1\u5ea6\u8be6\u89e3&#xff08;\u533a\u522b&#043;\u7528\u9014&#043;\u4f18\u7f3a\u70b9&#xff09;<\/h3>\n<h4>1. HSI \u9ad8\u901f\u5185\u90e8\u65f6\u949f&#xff08;High Speed Internal&#xff09;<\/h4>\n<ul>\n<li>\n<p>\u53c2\u6570&#xff1a;\u7247\u5185RC\u632f\u8361\u5668&#xff0c;\u56fa\u5b9a 16MHz&#xff0c;\u65e0\u9700\u5916\u90e8\u786c\u4ef6<\/p>\n<\/li>\n<li>\n<p>\u4e0a\u7535\u9ed8\u8ba4\u72b6\u6001&#xff1a;\u82af\u7247\u590d\u4f4d\u540e\u9ed8\u8ba4\u4ee5HSI\u4f5c\u4e3a\u7cfb\u7edf\u65f6\u949f\u8fd0\u884c<\/p>\n<\/li>\n<li>\n<p>\u4f18\u70b9&#xff1a;\u65e0\u9700\u5916\u8bbe\u3001\u4e0a\u7535\u5373\u542f\u3001\u4e0d\u4f1a\u4e0d\u8d77\u632f<\/p>\n<\/li>\n<li>\n<p>\u81f4\u547d\u7f3a\u70b9&#xff1a;\u7cbe\u5ea6\u5dee\u3001\u6e29\u6f02\u5927\u3001\u7535\u538b\u6ce2\u52a8\u5f71\u54cd\u5927&#xff0c;\u8bef\u5dee\u53ef\u8fbe\u767e\u5206\u4e4b\u51e0<\/p>\n<\/li>\n<li>\n<p>\u9002\u7528\u573a\u666f&#xff1a;\u8c03\u8bd5\u3001\u6545\u969c\u964d\u7ea7\u3001\u7b80\u5355\u88f8\u673a\u9879\u76ee&#xff1b;\u7981\u6b62\u91cf\u4ea7\u4ea7\u54c1\u505a\u4e3b\u65f6\u949f<\/p>\n<\/li>\n<\/ul>\n<h4>2. HSE \u9ad8\u901f\u5916\u90e8\u65f6\u949f&#xff08;High Speed External&#xff09;<\/h4>\n<ul>\n<li>\n<p>\u53c2\u6570&#xff1a;\u5916\u63a5\u77f3\u82f1\u6676\u632f&#xff0c;\u5e38\u7528 8MHz\u300125MHz<\/p>\n<\/li>\n<li>\n<p>\u4e24\u79cd\u5de5\u4f5c\u6a21\u5f0f&#xff1a;<\/p>\n<ul>\n<li>\n<p>1&#xff09;\u6676\u632f\u6a21\u5f0f&#xff1a;\u65e0\u6e90\u6676\u632f&#043;\u5339\u914d\u7535\u5bb9&#xff0c;\u6700\u5e38\u7528<\/p>\n<\/li>\n<li>\n<p>2&#xff09;\u65c1\u8def\u6a21\u5f0f&#xff1a;\u5916\u90e8\u6709\u6e90\u65f6\u949f\u8f93\u5165<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u4f18\u70b9&#xff1a;\u7cbe\u5ea6\u6781\u9ad8\u3001\u7a33\u5b9a\u6027\u5f3a\u3001\u6e29\u6f02\u6781\u5c0f<\/p>\n<\/li>\n<li>\n<p>\u91cf\u4ea7\u5730\u4f4d&#xff1a;\u6240\u6709\u6b63\u5f0f\u4ea7\u54c1PLL\u552f\u4e00\u6307\u5b9a\u8f93\u5165\u6e90<\/p>\n<\/li>\n<li>\n<p>\u7ecf\u5178\u5751\u70b9&#xff1a;\u786c\u4ef6\u6676\u632f\/\u7535\u5bb9\u5f02\u5e38\u65f6&#xff0c;\u4ee3\u7801\u5361\u6b7b\u5728\u7b49\u5f85 HSE_RDY \u6807\u5fd7\u4f4d<\/p>\n<\/li>\n<\/ul>\n<h4>3. PLL \u9501\u76f8\u73af&#xff08;\u6838\u5fc3\u500d\u9891\u7535\u8def&#xff09;<\/h4>\n<p>\u91cd\u70b9&#xff1a;PLL\u4e0d\u662f\u632f\u8361\u5668&#xff0c;\u4e0d\u4f1a\u4ea7\u751f\u65f6\u949f&#xff0c;\u4ec5\u505a\u5206\u9891&#043;\u500d\u9891\u63d0\u5347\u4e3b\u9891<\/p>\n<p>\u8f93\u5165\u6e90\u4e8c\u9009\u4e00&#xff1a;HSI \/ HSE&#xff08;\u5de5\u7a0b\u4e00\u5f8b\u9009HSE&#xff09;<\/p>\n<p>\u4e3b PLL \u5185\u90e8\u53c2\u6570&#xff1a;<\/p>\n<ul>\n<li>PLL_M&#xff1a;\u8f93\u5165\u5206\u9891&#xff0c;\u63a8\u8350\u8f93\u51fa 1M \u7ed9 VCO&#xff1b;<\/li>\n<li>PLL_N&#xff1a;VCO \u500d\u9891&#xff0c;VCO \u8f93\u51fa\u5fc5\u987b 100MHz\u2011432MHz\u786c\u4ef6\u786c\u6027\u7ea6\u675f&#xff1b;<\/li>\n<li>PLL_P&#xff1a;\u8f93\u51fa\u5206\u9891&#xff0c;\u7ed9\u5230 SYSCLK&#xff0c;\u6700\u5927\u8f93\u51fa 168M&#xff1b;<\/li>\n<li>PLL_Q&#xff1a;\u8f93\u51fa\u7ed9 USB OTG&#xff0c;\u5fc5\u987b\u8f93\u51fa 48M&#xff0c;USB \u624d\u80fd\u5de5\u4f5c\u3002<\/li>\n<\/ul>\n<p>PLL\u786c\u6027\u786c\u4ef6\u7ea6\u675f&#xff08;\u5fc5\u8003&#xff0c;\u4e0d\u53ef\u8fdd\u53cd&#xff09;<\/p>\n<ul>\n<li>\n<p>VCO\u4e2d\u95f4\u9891\u7387\u5fc5\u987b&#xff1a;100MHz ~ 432MHz<\/p>\n<\/li>\n<li>\n<p>PLL_P\u8f93\u51fa\u6700\u5927\u4e3b\u9891&#xff1a;168MHz<\/p>\n<\/li>\n<li>\n<p>PLL_Q\u8f93\u51fa\u5fc5\u987b\u4e25\u683c 48MHz&#xff0c;\u5426\u5219USB\u5f7b\u5e95\u5931\u6548<\/p>\n<\/li>\n<\/ul>\n<p>\u6807\u51c6\u8ba1\u7b97\u516c\u5f0f&#xff08;F4\u7ecf\u5178168M\u914d\u7f6e&#xff09;<\/p>\n<p>HSE&#061;8MHz&#xff0c;PLL_M&#061;8&#xff0c;PLL_N&#061;336&#xff0c;PLL_P&#061;2&#xff0c;PLL_Q&#061;7<\/p>\n<p>VCO &#061; 8M \/ 8 \u00d7 336 &#061; 336MHz&#xff08;\u5408\u6cd5\u533a\u95f4&#xff09;<\/p>\n<p>SYSCLK &#061; 336M \/ 2 &#061; 168MHz<\/p>\n<p>USB\u65f6\u949f &#061; 336M \/ 7 &#061; 48MHz<\/p>\n<h4>4. LSI \u4f4e\u901f\u5185\u90e8RC&#xff08;Low Speed Internal&#xff09;<\/h4>\n<ul>\n<li>\n<p>\u9891\u7387&#xff1a;\u7ea632KHz&#xff0c;\u7cbe\u5ea6\u6781\u5dee\u3001\u6f02\u79fb\u4e25\u91cd<\/p>\n<\/li>\n<li>\n<p>\u552f\u4e00\u521a\u9700\u7528\u9014&#xff1a;\u72ec\u7acb\u770b\u95e8\u72d7 IWDG \u53ea\u80fd\u4f7f\u7528LSI<\/p>\n<\/li>\n<li>\n<p>\u8f85\u52a9\u7528\u9014&#xff1a;RTC\u5907\u7528\u65f6\u949f&#xff08;\u4e0d\u63a8\u8350&#xff09;<\/p>\n<\/li>\n<li>\n<p>\u7279\u6027&#xff1a;\u4e3b\u65f6\u949f\u5d29\u6e83\u3001\u4f11\u7720\u6a21\u5f0f\u4e0b\u4f9d\u65e7\u72ec\u7acb\u8fd0\u884c<\/p>\n<\/li>\n<\/ul>\n<h4>5. LSE \u4f4e\u901f\u5916\u90e8\u6676\u632f&#xff08;Low Speed External&#xff09;<\/h4>\n<ul>\n<li>\n<p>\u9891\u7387&#xff1a;\u7cbe\u51c6 32.768KHz&#xff08;2\u768415\u6b21\u65b9&#xff09;<\/p>\n<\/li>\n<li>\n<p>\u6838\u5fc3\u4f18\u52bf&#xff1a;15\u6b21\u4e8c\u5206\u9891\u7cbe\u51c6\u8f93\u51fa 1Hz&#xff0c;\u8ba1\u65f6\u7edd\u5bf9\u7cbe\u51c6<\/p>\n<\/li>\n<li>\n<p>\u4f9b\u7535\u7279\u6027&#xff1a;\u5c5e\u4e8e\u5907\u4efd\u57df&#xff0c;\u4e3b\u7535\u6e90\u65ad\u7535&#xff0c;\u7ebd\u6263\u7535\u6c60\u53ef\u7ee7\u7eed\u7ef4\u6301\u8fd0\u884c<\/p>\n<\/li>\n<li>\n<p>\u91cf\u4ea7\u89c4\u8303&#xff1a;\u6240\u6709\u5e26RTC\u8ba1\u65f6\u4ea7\u54c1\u5fc5\u987b\u4f7f\u7528LSE&#xff0c;\u4e25\u7981LSI<\/p>\n<\/li>\n<\/ul>\n<h3>\u4e09\u3001\u4e09\u7ea7\u603b\u7ebf\u65f6\u949f \u5b8c\u6574\u89e3\u6790&#xff08;SYSCLK\/HCLK\/PCLK1\/PCLK2&#xff09;<\/h3>\n<h4>1. \u56db\u5927\u603b\u7ebf\u65f6\u949f\u5b9a\u4e49<\/h4>\n<ul>\n<li>\n<p>SYSCLK&#xff1a;\u7cfb\u7edf\u5185\u6838\u65f6\u949f&#xff0c;CPU\u8fd0\u884c\u4e3b\u9891&#xff0c;\u6700\u5927168MHz<\/p>\n<\/li>\n<li>\n<p>HCLK(AHB)&#xff1a;\u9ad8\u7ea7\u603b\u7ebf\u65f6\u949f&#xff0c;\u4f9b\u7ed9\u5185\u6838\u3001DMA\u3001GPIO\u3001FMC\u3001ETH<\/p>\n<\/li>\n<li>\n<p>PCLK1(APB1)&#xff1a;\u4f4e\u901f\u5916\u8bbe\u65f6\u949f&#xff0c;\u6700\u592742MHz&#xff0c;\u6302\u8f7d&#xff1a;TIM2-7\u3001USART2\/3\u3001I2C\u3001CAN\u3001SPI2\/3<\/p>\n<\/li>\n<li>\n<p>PCLK2(APB2)&#xff1a;\u9ad8\u901f\u5916\u8bbe\u65f6\u949f&#xff0c;\u6700\u592784MHz&#xff0c;\u6302\u8f7d&#xff1a;TIM1\/8\u3001USART1\u3001SPI1\u3001ADC\u3001EXTI<\/p>\n<\/li>\n<\/ul>\n<h4>2. \u5b9a\u65f6\u5668\u53cc\u500d\u9891\u7ec8\u6781\u539f\u7406&#xff08;\u9762\u8bd5\u9ad8\u9891\u91cd\u96be\u70b9&#xff09;<\/h4>\n<p>STM32 \u786c\u4ef6\u539f\u751f\u673a\u5236&#xff0c;\u6240\u6709APB\u603b\u7ebf\u5b9a\u65f6\u5668\u901a\u7528&#xff0c;\u5f88\u591a\u4eba\u5b9a\u65f6\u4e0d\u51c6\u7684\u6839\u672c\u539f\u56e0&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u5f53 APB\u9884\u5206\u9891 &#061; 1&#xff08;\u4e0d\u5206\u9891&#xff09;&#xff1a;\u5b9a\u65f6\u5668\u5de5\u4f5c\u65f6\u949f &#061; PCLK<\/p>\n<\/li>\n<li>\n<p>\u5f53 APB\u9884\u5206\u9891 &gt; 1&#xff08;\u5206\u9891&#xff09;&#xff1a;\u5b9a\u65f6\u5668\u5de5\u4f5c\u65f6\u949f &#061; PCLK \u00d7 2<\/p>\n<\/li>\n<\/ul>\n<p>\u6807\u51c6\u5de5\u7a0b\u5b9e\u6218\u8ba1\u7b97<\/p>\n<p>SYSCLK&#061;168M&#xff0c;AHB&#061;1\u5206\u9891&#xff0c;APB1&#061;4\u5206\u9891&#xff0c;APB2&#061;2\u5206\u9891<\/p>\n<p>PCLK1&#061;42M \u2192 \u5206\u9891&gt;1 \u2192 APB1\u5b9a\u65f6\u5668\u65f6\u949f &#061; 84M<\/p>\n<p>PCLK2&#061;84M \u2192 \u5206\u9891&gt;1 \u2192 APB2\u5b9a\u65f6\u5668\u65f6\u949f &#061; 168M<\/p>\n<p>\u8bbe\u8ba1\u76ee\u7684&#xff1a;APB\u603b\u7ebf\u9650\u901f\u4fdd\u8bc1\u5916\u8bbe\u7a33\u5b9a&#xff0c;\u5b9a\u65f6\u5668\u6027\u80fd\u66f4\u5f3a&#xff0c;\u786c\u4ef6\u500d\u9891\u538b\u69a8\u6700\u5927\u6027\u80fd\u3002<\/p>\n<h3>\u56db\u3001\u5916\u8bbe\u65f6\u949f\u95e8\u63a7\u673a\u5236&#xff08;\u5fc5\u61c2\u4f4e\u529f\u8017\u57fa\u7840&#xff09;<\/h3>\n<p>STM32 \u51fa\u5382\u9ed8\u8ba4&#xff1a;\u6240\u6709\u5916\u8bbe\u65f6\u949f\u5168\u90e8\u5173\u95ed\u3002<\/p>\n<p>\u4e3a\u6781\u81f4\u4f4e\u529f\u8017\u8bbe\u8ba1&#xff1a;\u5916\u8bbe\u4e0d\u5de5\u4f5c\u65f6\u5173\u95ed\u65f6\u949f&#xff0c;\u5185\u90e8\u7535\u8def\u505c\u6b62\u7ffb\u8f6c&#xff0c;\u675c\u7edd\u65e0\u6548\u529f\u8017\u3002<\/p>\n<p>\u6838\u5fc3\u89c4\u5219&#xff1a;\u4e0d\u5f00\u542fRCC\u65f6\u949f&#xff0c;\u5916\u8bbe\u5bc4\u5b58\u5668\u8bfb\u5199\u65e0\u6548&#xff0c;\u5916\u8bbe\u5f7b\u5e95\u4e0d\u5de5\u4f5c\u3002<\/p>\n<p>\u4ee3\u7801\u5757&#xff1a;<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/ \u5f00\u542f\u5916\u8bbe\u65f6\u949f <\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0__HAL_RCC_GPIOA_CLK_ENABLE(); <\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0__HAL_RCC_USART1_CLK_ENABLE(); <\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/ \u5173\u95ed\u5916\u8bbe\u65f6\u949f&#xff08;\u4f4e\u529f\u8017\u5fc5\u5907&#xff09; <\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0__HAL_RCC_USART1_CLK_DISABLE();<\/p>\n<\/p>\n<h3>\u4e94\u3001\u666e\u901a\u5de5\u4f5c\u6a21\u5f0f \u6807\u51c6\u65f6\u949f\u914d\u7f6e\u5b8c\u6574\u6d41\u7a0b&#xff08;HAL\u5e93\u5b98\u65b9\u6d41\u7a0b&#xff09;<\/h3>\n<p>\u4e0a\u7535\u540e SystemClock_Config() \u4e25\u683c\u6267\u884c\u5982\u4e0b\u987a\u5e8f&#xff0c;\u987a\u5e8f\u4e0d\u53ef\u98a0\u5012&#xff1a;<\/p>\n<li>\n<p>\u5f00\u542f HSE \u5916\u90e8\u6676\u632f&#xff0c;\u5faa\u73af\u7b49\u5f85 HSE_RDY \u5c31\u7eea<\/p>\n<\/li>\n<li>\n<p>\u914d\u7f6e PLL M\/N\/P\/Q \u53c2\u6570&#xff0c;\u5f00\u542fPLL&#xff0c;\u7b49\u5f85PLL\u9501\u5b9a<\/p>\n<\/li>\n<li>\n<p>\u914d\u7f6e AHB\u3001APB1\u3001APB2 \u9884\u5206\u9891\u7cfb\u6570<\/p>\n<\/li>\n<li>\n<p>\u5207\u6362\u7cfb\u7edf\u65f6\u949f\u6e90\u4e3a PLL_P&#xff0c;\u66f4\u65b0 SYSCLK \u4e3b\u9891<\/p>\n<\/li>\n<li>\n<p>\u7b49\u5f85\u65f6\u949f\u5207\u6362\u7a33\u5b9a\u751f\u6548<\/p>\n<\/li>\n<li>\n<p>\u5f00\u542f\u4e1a\u52a1\u6240\u9700\u5916\u8bbe\u65f6\u949f<\/p>\n<\/li>\n<li>\n<p>\u66f4\u65b0 SysTick \u65f6\u949f&#xff0c;\u4fdd\u8bc1 HAL_Delay \u5ef6\u65f6\u7cbe\u51c6<\/p>\n<\/li>\n<h3>\u516d\u3001\u4f4e\u529f\u8017\u6a21\u5f0f \u65f6\u949f\u7cfb\u7edf\u6700\u5168\u8be6\u89e3<\/h3>\n<p>STM32F4 \u4e09\u5927\u4f4e\u529f\u8017\u6a21\u5f0f&#xff0c;\u6838\u5fc3\u533a\u522b\u5c31\u662f\u65f6\u949f\u57df\u7684\u5173\u95ed\u7a0b\u5ea6&#xff0c;\u4f11\u7720\u529f\u8017\u5b8c\u5168\u7531\u65f6\u949f\u63a7\u5236\u3002<\/p>\n<h4>1. Sleep \u7761\u7720\u6a21\u5f0f&#xff08;\u6700\u5f31\u4f4e\u529f\u8017&#xff09;<\/h4>\n<ul>\n<li>\n<p>\u65f6\u949f\u72b6\u6001&#xff1a;SYSCLK\u3001HSE\u3001PLL\u3001\u603b\u7ebf\u65f6\u949f\u5168\u90e8\u6b63\u5e38\u8fd0\u884c<\/p>\n<\/li>\n<li>\n<p>\u786c\u4ef6\u72b6\u6001&#xff1a;CPU\u5185\u6838\u505c\u6b62&#xff0c;\u5916\u8bbe\u3001DMA\u3001\u5b9a\u65f6\u5668\u6b63\u5e38\u5de5\u4f5c<\/p>\n<\/li>\n<li>\n<p>\u7279\u70b9&#xff1a;\u529f\u8017\u964d\u4f4e\u6709\u9650&#xff0c;\u51e0\u4e4e\u4e0d\u7528\u505a\u7535\u6c60\u4ea7\u54c1<\/p>\n<\/li>\n<\/ul>\n<h4>2. Stop \u505c\u6b62\u6a21\u5f0f&#xff08;\u5de5\u4e1a\u4f4e\u529f\u8017\u4e3b\u6d41&#xff09;<\/h4>\n<ul>\n<li>\n<p>\u786c\u4ef6\u81ea\u52a8\u5173\u95ed&#xff1a;HSE\u3001PLL \u5f7b\u5e95\u505c\u6b62\u632f\u8361<\/p>\n<\/li>\n<li>\n<p>\u53ef\u914d\u7f6e\u4fdd\u7559&#xff1a;HSI \u53ef\u9009\u62e9\u5f00\u542f\/\u5173\u95ed&#xff08;\u5f00\u542f\u5524\u9192\u5feb\u3001\u529f\u8017\u9ad8&#xff1b;\u5173\u95ed\u529f\u8017\u6781\u4f4e&#xff09;<\/p>\n<\/li>\n<li>\n<p>\u6c38\u4e45\u8fd0\u884c&#xff1a;LSE\/LSI \u4f4e\u901f\u65f6\u949f\u57df\u4e0d\u53d7\u5f71\u54cd<\/p>\n<\/li>\n<li>\n<p>\u5b58\u50a8\u5668\u72b6\u6001&#xff1a;SRAM\u3001\u5bc4\u5b58\u5668\u6570\u636e\u5168\u90e8\u4fdd\u7559\u4e0d\u4e22\u5931<\/p>\n<\/li>\n<li>\n<p>\u5524\u9192\u673a\u5236&#xff1a;\u5916\u90e8\u4e2d\u65ad \/ RTC\u95f9\u949f\u5524\u9192&#xff0c;\u5524\u9192\u540e\u7ee7\u7eed\u6267\u884c\u4ee3\u7801&#xff0c;\u4e0d\u590d\u4f4d<\/p>\n<\/li>\n<\/ul>\n<h5>Stop\u6a21\u5f0f \u5b8c\u6574\u6807\u51c6\u65f6\u949f\u914d\u7f6e\u6d41\u7a0b&#xff08;\u91cf\u4ea7\u53ef\u7528&#xff09;<\/h5>\n<h6>\u2460 \u521d\u59cb\u5316\u9636\u6bb5&#xff08;\u4ec5\u4e0a\u7535\u6267\u884c\u4e00\u6b21&#xff09;<\/h6>\n<li>\n<p>\u5f00\u542f PWR \u7535\u6e90\u65f6\u949f&#xff0c;\u4f7f\u80fd\u5907\u4efd\u57df\u8bbf\u95ee<\/p>\n<\/li>\n<li>\n<p>\u5f00\u542f LSE 32.768K\u6676\u632f&#xff0c;\u914d\u7f6eRTC\u65f6\u949f\u6e90\u4e3aLSE<\/p>\n<\/li>\n<li>\n<p>\u914d\u7f6eRTC\u95f9\u949f\/\u5468\u671f\u5524\u9192\u529f\u80fd<\/p>\n<\/li>\n<h6>\u2461 \u4e1a\u52a1\u5de5\u4f5c\u9636\u6bb5<\/h6>\n<p>HSE&#043;PLL\u5168\u5f00&#xff0c;168M\u4e3b\u9891\u8fd0\u884c&#xff0c;\u6b63\u5e38\u91c7\u96c6\u3001\u901a\u4fe1\u3001\u4e0a\u62a5<\/p>\n<h6>\u2462 \u8fdb\u5165\u4f11\u7720\u524d&#xff08;\u5173\u952e&#xff1a;\u964d\u529f\u8017\u6838\u5fc3\u6b65\u9aa4&#xff09;<\/h6>\n<li>\n<p>\u5173\u95ed\u6240\u6709\u4e1a\u52a1\u5916\u8bbe\u65f6\u949f&#xff08;\u4e32\u53e3\u3001SPI\u3001TIM\u3001ADC\u7b49&#xff09;<\/p>\n<\/li>\n<li>\n<p>\u8f6f\u4ef6\u624b\u52a8\u5173\u95ed PLL\u3001HSE&#xff08;\u786c\u4ef6\u867d\u81ea\u52a8\u5173&#xff0c;\u624b\u52a8\u5173\u675c\u7edd\u5bc4\u5b58\u5668\u5f02\u5e38&#xff09;<\/p>\n<\/li>\n<li>\n<p>\u5173\u95ed MCO \u65f6\u949f\u8f93\u51fa&#xff0c;\u6d88\u9664\u5f15\u811a\u6f0f\u7535\u6d41<\/p>\n<\/li>\n<li>\n<p>\u914d\u7f6e\u5524\u9192\u6e90&#xff08;RTC\/EXTI&#xff09;<\/p>\n<\/li>\n<li>\n<p>\u8fdb\u5165 Stop \u4f4e\u529f\u8017\u6a21\u5f0f<\/p>\n<\/li>\n<h6>\u2463 \u5524\u9192\u540e\u65f6\u949f\u6062\u590d\u6d41\u7a0b<\/h6>\n<p>\u5524\u9192\u77ac\u95f4\u72b6\u6001&#xff1a;SYSCLK&#061;HSI(16M)&#xff0c;HSE\/PLL\u5173\u95ed&#xff0c;SysTick\u5931\u6548<\/p>\n<li>\n<p>\u91cd\u65b0\u5f00\u542f HSE \u5e76\u7b49\u5f85\u5c31\u7eea<\/p>\n<\/li>\n<li>\n<p>\u91cd\u65b0\u521d\u59cb\u5316 PLL \u5e76\u9501\u5b9a<\/p>\n<\/li>\n<li>\n<p>\u91cd\u65b0\u914d\u7f6e AHB\/APB \u5206\u9891<\/p>\n<\/li>\n<li>\n<p>\u5207\u6362 SYSCLK \u4e3a PLL 168M<\/p>\n<\/li>\n<li>\n<p>\u91cd\u65b0\u521d\u59cb\u5316 SysTick&#xff0c;\u6062\u590d HAL_Delay<\/p>\n<\/li>\n<li>\n<p>\u91cd\u65b0\u5f00\u542f\u5916\u8bbe\u65f6\u949f&#xff0c;\u6062\u590d\u4e1a\u52a1<\/p>\n<\/li>\n<h4>3. Standby \u5f85\u673a\u6a21\u5f0f&#xff08;\u6700\u4f4e\u529f\u8017&#xff09;<\/h4>\n<ul>\n<li>\n<p>\u65f6\u949f\u72b6\u6001&#xff1a;\u6240\u6709\u9ad8\u901f\u65f6\u949f\u5168\u90e8\u65ad\u7535&#xff08;HSE\/HSI\/PLL\u5f7b\u5e95\u5173\u95ed&#xff09;<\/p>\n<\/li>\n<li>\n<p>\u4ec5\u5b58\u65f6\u949f&#xff1a;\u5907\u4efd\u57df LSE\/LSI\u3001RTC\u3001IWDG<\/p>\n<\/li>\n<li>\n<p>\u5b58\u50a8\u5668\u72b6\u6001&#xff1a;SRAM\u3001\u5bc4\u5b58\u5668\u6570\u636e\u5168\u90e8\u4e22\u5931<\/p>\n<\/li>\n<li>\n<p>\u5524\u9192\u6548\u679c&#xff1a;\u7b49\u4ef7\u786c\u4ef6\u590d\u4f4d&#xff0c;\u7a0b\u5e8f\u4ece\u5934\u6267\u884cmain<\/p>\n<\/li>\n<\/ul>\n<p>\u65e0\u9700\u624b\u52a8\u5173\u95ed\u65f6\u949f&#xff0c;\u8fdb\u5165Standby\u786c\u4ef6\u81ea\u52a8\u5207\u65ad\u6240\u6709\u9ad8\u901f\u65f6\u949f\u57df\u3002<\/p>\n<h3>\u4e03\u3001\u65f6\u949f\u7cfb\u7edf \u5168\u5957\u8e29\u5751\u603b\u7ed3<\/h3>\n<li>\n<p>\u4f11\u7720\u7535\u6d41\u964d\u4e0d\u4e0b\u6765&#xff1a;\u5916\u8bbe\u65f6\u949f\u672aDISABLE\u3001MCO&#xff08;\u5fae\u63a7\u5236\u5668\u65f6\u949f\u8f93\u51fa\u5f15\u811a\u200c&#xff09;\u672a\u5173\u95ed\u3001PLL\u672a\u624b\u52a8\u5173\u95ed<\/p>\n<\/li>\n<li>\n<p>\u5b9a\u65f6\u5668\u5b9a\u65f6\u4e0d\u51c6&#xff1a;\u5ffd\u7565APB\u5206\u9891&gt;1\u5b9a\u65f6\u5668\u00d72\u500d\u9891\u89c4\u5219<\/p>\n<\/li>\n<li>\n<p>\u4e32\u53e3\u4e71\u7801&#xff1a;PCLK\u65f6\u949f\u914d\u7f6e\u9519\u8bef&#xff0c;\u6ce2\u7279\u7387\u5206\u9891\u8ba1\u7b97\u504f\u5dee\u8fc7\u5927<\/p>\n<\/li>\n<li>\n<p>HAL_Delay\u4e0d\u51c6&#xff1a;\u5524\u9192\u540e\u672a\u6062\u590d\u5b8c\u6574SYSCLK&#xff0c;SysTick\u65f6\u949f\u9519\u8bef<\/p>\n<\/li>\n<li>\n<p>HSE\u5361\u6b7b&#xff1a;\u786c\u4ef6\u6676\u632f\/\u7535\u5bb9\u635f\u574f&#xff0c;\u4ee3\u7801\u6b7b\u7b49HSE\u5c31\u7eea\u4f4d<\/p>\n<\/li>\n<li>\n<p>USB\u65e0\u6cd5\u4f7f\u7528&#xff1a;PLL_Q\u672a\u7cbe\u51c6\u8f93\u51fa48MHz<\/p>\n<\/li>\n<li>\n<p>RTC\u65f6\u95f4\u6f02\u79fb&#xff1a;\u4f7f\u7528LSI\u800c\u975eLSE&#xff0c;\u91cf\u4ea7\u4e25\u7981<\/p>\n<\/li>\n<li>\n<p>Stop\u5524\u9192\u7a0b\u5e8f\u5f02\u5e38&#xff1a;\u5524\u9192\u540e\u672a\u91cd\u65b0\u521d\u59cb\u5316RCC&#xff0c;\u65f6\u949f\u5904\u4e8e\u6df7\u4e71\u72b6\u6001<\/p>\n<\/li>\n<h3>\u516b\u3001\u9762\u8bd5\u9ad8\u9891\u5fc5\u80cc\u95ee\u7b54&#xff08;\u7cbe\u70bc\u6807\u51c6\u7b54\u6848&#xff09;<\/h3>\n<p>Q1&#xff1a;PLL\u7684VCO\u4e3a\u4ec0\u4e48\u5fc5\u987b\u9650\u5236100~432MHz&#xff1f;<\/p>\n<p>A&#xff1a;VCO\u662f\u538b\u63a7\u632f\u8361\u5668&#xff0c;\u8d85\u51fa\u533a\u95f4\u4f1a\u5bfc\u81f4\u65f6\u949f\u6296\u52a8\u3001\u9501\u76f8\u4e0d\u7a33\u5b9a\u3001\u82af\u7247\u5de5\u4f5c\u5f02\u5e38&#xff0c;\u662f\u786c\u4ef6\u7535\u6c14\u7279\u6027\u786c\u6027\u7ea6\u675f\u3002<\/p>\n<p>Q2&#xff1a;APB\u5206\u9891\u5927\u4e8e1&#xff0c;\u5b9a\u65f6\u5668\u4e3a\u4ec0\u4e48\u00d72\u500d\u9891&#xff1f;<\/p>\n<p>A&#xff1a;\u603b\u7ebf\u4e3a\u4e86\u7a33\u5b9a\u6027\u9650\u5236\u6700\u9ad8\u9891\u7387&#xff0c;\u5b9a\u65f6\u5668\u6027\u80fd\u66f4\u5f3a&#xff0c;\u786c\u4ef6\u81ea\u52a8\u500d\u9891&#xff0c;\u6700\u5927\u5316\u5b9a\u65f6\u5668\u5de5\u4f5c\u4e3b\u9891\u3002<\/p>\n<p>Q3&#xff1a;Stop\u6a21\u5f0f\u5524\u9192\u540e\u7cfb\u7edf\u65f6\u949f\u662f\u4ec0\u4e48&#xff1f;<\/p>\n<p>A&#xff1a;\u9ed8\u8ba4HSI 16MHz&#xff0c;HSE\/PLL\u5173\u95ed&#xff0c;\u5fc5\u987b\u624b\u52a8\u91cd\u65b0\u914d\u7f6eRCC\u6062\u590d168M\u4e3b\u9891\u3002<\/p>\n<p>Q4&#xff1a;\u4e3a\u4ec0\u4e48\u5916\u8bbe\u65f6\u949f\u9ed8\u8ba4\u5173\u95ed&#xff1f;<\/p>\n<p>A&#xff1a;\u4f4e\u529f\u8017\u8bbe\u8ba1&#xff0c;\u95f2\u7f6e\u5916\u8bbe\u5173\u95ed\u65f6\u949f\u505c\u6b62\u7535\u5e73\u7ffb\u8f6c&#xff0c;\u964d\u4f4e\u9759\u6001\u529f\u8017\u3002<\/p>\n<p>Q5&#xff1a;Stop\u548cStandby\u65f6\u949f\u6838\u5fc3\u533a\u522b&#xff1f;<\/p>\n<p>A&#xff1a;Stop\u4fdd\u7559SRAM\/\u5bc4\u5b58\u5668&#xff0c;\u4ec5\u5173\u95ed\u9ad8\u901f\u65f6\u949f&#xff0c;\u5524\u9192\u7eed\u8dd1&#xff1b;Standby\u5168\u90e8\u9ad8\u901f\u65f6\u949f\u65ad\u7535&#xff0c;\u6570\u636e\u4e22\u5931&#xff0c;\u5524\u9192\u590d\u4f4d\u3002<\/p>\n<p>Q6&#xff1a;\u4f4e\u529f\u8017\u8bbe\u5907RTC\u5fc5\u987b\u7528\u4ec0\u4e48\u65f6\u949f&#xff1f;<\/p>\n<p>A&#xff1a;\u5fc5\u987bLSE 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