BKP\uff08Backup Registers\uff09\u5907\u4efd\u5bc4\u5b58\u5668 BKP\u53ef\u7528\u4e8e\u5b58\u50a8\u7528\u6237\u5e94\u7528\u7a0b\u5e8f\u6570\u636e\u3002<\/p>\n
\u5f53VDD\uff082.0~3.6V\uff09\u7535\u6e90\uff08VDD\u662f\u4e3b\u7535\u6e90\uff09\u88ab\u5207\u65ad\uff0c\u4ed6\u4eec\u4ecd\u7136\u7531VBAT\uff081.8~3.6V\uff09\u7ef4\u6301\u4f9b\u7535\u3002\u5f53\u7cfb\u7edf\u5728\u5f85\u673a\u6a21\u5f0f\u4e0b\u88ab\u5524\u9192\uff0c\u6216\u7cfb\u7edf\u590d\u4f4d\u6216\u7535\u6e90\u590d\u4f4d\u65f6\uff0c\u4ed6\u4eec\u4e5f\u4e0d\u4f1a\u88ab\u590d\u4f4d\u3002\u5982\u679c\u8981\u4f7f\u7528STM32\u5185\u90e8\u7684BKP\u548cRTC\uff0c\u8fd9\u4e2aVBAT\u5f15\u811a\u5c31\u5fc5\u987b\u63a5\u5907\u7528\u7535\u6c60\uff0c\u7528\u6765\u7ef4\u6301BKP\u548cRTC\uff0c\u5728VDD\u4e3b\u7535\u6e90\u6389\u7535\u540e\u7684\u4f9b\u7535\u3002\u8fd9\u91cc\u7684\u5907\u7528\u7535\u6c60\u53ea\u6709\u4e00\u6839\u6b63\u6781\u7684\u4f9b\u7535\u5f15\u811a\uff0c\u63a5\u7535\u6c60\u65f6\uff0c\u7535\u6c60\u6b63\u6781\u63a5\u5230VBAT\uff0c\u7535\u6c60\u8d1f\u6781\u548c\u4e3b\u7535\u6e90\u7684\u8d1f\u6781\u63a5\u5728\u4e00\u8d77\u5171\u5730\u5c31\u884c\u4e86\u3002<\/p>\n
\u7b80\u5355\u6765\u8bf4\u5c31\u662f\uff0cVBAT\u7684\u4f5c\u7528\u5c31\u662f\u5f53VDD\u65ad\u7535\u65f6\uff0cBKP\u4f1a\u5207\u6362\u5230VBAT\u4f9b\u7535\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u7ee7\u7eed\u7ef4\u6301BKP\u91cc\u9762\u7684\u6570\u636e\u3002<\/p>\n
\u5982\u679c\u4e3b\u7535\u6e90VDD\u548cVBAT\u90fd\u65ad\u7535\u4e86\uff0c\u90a3\u4e48BKP\u91cc\u9762\u7684\u6570\u636e\u5c31\u4f1a\u6e05\u96f6\u3002\u56e0\u4e3aBKP\u672c\u8d28\u4e0a\u662fRAM\u5b58\u50a8\u5668\uff0c\u6ca1\u6709\u6389\u7535\u4e0d\u4e22\u5931\u7684\u80fd\u529b\u3002<\/p>\n
<\/div><\/div><\/div>\n
TAMPER\u5f15\u811a\u4ea7\u751f\u7684\u4fb5\u5165\u4e8b\u4ef6\u5c06\u6240\u6709\u5907\u4efd\u5bc4\u5b58\u5668\u5185\u5bb9\u6e05\u9664\u3002\u8fd9\u4e2a\u5f15\u811a\u662f\u4e00\u4e2a\u5b89\u5168\u4fdd\u969c\u8bbe\u8ba1\uff0c\u6bd4\u5982\u4f60\u505a\u4e00\u4e2a\u5b89\u5168\u7cfb\u6570\u975e\u5e38\u9ad8\u7684\u8bbe\u5907\uff0c\u8bbe\u5907\u9700\u8981\u6709\u9632\u62c6\u529f\u80fd\uff0c\u7136\u540eBKP\u91cc\u4e5f\u5b58\u50a8\u4e86\u4e00\u4e9b\u654f\u611f\u6570\u636e\uff0c\u4e0d\u80fd\u88ab\u522b\u4eba\u7a83\u53d6\u6216\u8005\u7be1\u6539\uff0c\u5c31\u53ef\u4ee5\u4f7f\u7528TAMPER\u5f15\u811a\u7684\u4fb5\u5165\u68c0\u6d4b\u529f\u80fd\u3002<\/p>\n
RTC\u5f15\u811a\u8f93\u51faRTC\u6821\u51c6\u65f6\u949f\u3001RTC\u95f9\u949f\u8109\u51b2\u6216\u8005\u79d2\u8109\u51b2\u3002<\/p>\n
\u5b58\u50a8RTC\u65f6\u949f\u6821\u51c6\u5bc4\u5b58\u5668\u3002<\/p>\n
\u7528\u6237\u6570\u636e\u5b58\u50a8\u5bb9\u91cf\uff1a 20\u5b57\u8282\uff08\u4e2d\u5bb9\u91cf\u548c\u5c0f\u5bb9\u91cf\uff09\/ 84\u5b57\u8282\uff08\u5927\u5bb9\u91cf\u548c\u4e92\u8054\u578b\uff09\u3002<\/p>\n
<\/p>\n
\u540e\u5907\u533a\u57df\u6709\uff1a\u6570\u636e\u5bc4\u5b58\u5668\u3001\u63a7\u5236\u5bc4\u5b58\u5668\u3001\u72b6\u6001\u5bc4\u5b58\u5668\u548cRTC\u65f6\u949f\u6821\u51c6\u5bc4\u5b58\u5668\u3002<\/p>\n
BKP\u5904\u4e8e\u540e\u5907\u533a\u57df\uff0c\u4f46\u540e\u5907\u533a\u57df\u4e0d\u53ea\u6709BKP\uff0c\u8fd8\u6709RTC\u76f8\u5173\u7684\u7535\u8def\u3002STM32\u540e\u5907\u533a\u57df\u7684\u7279\u6027\u5c31\u662f\uff0c\u5f53VDD\u4e3b\u7535\u6e90\u6389\u7535\u65f6\uff0c\u540e\u5907\u533a\u57df\u4ecd\u7136\u53ef\u4ee5\u7531VBAT\u7684\u5907\u7528\u7535\u6c60\u4f9b\u7535\u3002\u5f53VDD\u4e3b\u7535\u6e90\u4e0a\u7535\u65f6\uff0c\u540e\u5907\u533a\u57df\u4f9b\u7535\u4f1a\u7531VBAT\u5207\u6362\u5230VDD\u3002<\/p>\n
\u540e\u5907\u533a\u57df\u4e2d\u6570\u636e\u5bc4\u5b58\u5668\u662f\u4e3b\u8981\u90e8\u5206\uff0c\u6bcf\u4e2a\u6570\u636e\u5bc4\u5b58\u5668\u90fd\u662f16\u4f4d\u7684\uff0c\u4e5f\u5c31\u662f1\u4e2a\u6570\u636e\u5bc4\u5b58\u5668\u53ef\u4ee5\u5b582\u4e2a\u5b57\u8282\u3002<\/p>\n
RTC\uff08Real Time Clock\uff09\u5b9e\u65f6\u65f6\u949f\u3002 RTC\u662f\u4e00\u4e2a\u72ec\u7acb\u7684\u5b9a\u65f6\u5668\uff0c\u53ef\u4e3a\u7cfb\u7edf\u63d0\u4f9b\u65f6\u949f\u548c\u65e5\u5386\u7684\u529f\u80fd \u3002<\/p>\n
RTC\u548c\u65f6\u949f\u914d\u7f6e\u7cfb\u7edf\u5904\u4e8e\u540e\u5907\u533a\u57df\uff0c\u7cfb\u7edf\u590d\u4f4d\u65f6\u6570\u636e\u4e0d\u6e05\u96f6\uff0cVDD\uff082.0~3.6V\uff09\u65ad\u7535\u540e\u53ef\u501f\u52a9VBAT\uff081.8~3.6V\uff09\u4f9b\u7535\u7ee7\u7eed\u8d70\u65f6\u3002<\/p>\n
32\u4f4d\u7684\u53ef\u7f16\u7a0b\u8ba1\u6570\u5668\uff0c\u53ef\u5bf9\u5e94Unix\u65f6\u95f4\u6233\u7684\u79d2\u8ba1\u6570\u5668\u3002<\/p>\n
20\u4f4d\u7684\u53ef\u7f16\u7a0b\u9884\u5206\u9891\u5668\uff0c\u53ef\u9002\u914d\u4e0d\u540c\u9891\u7387\u7684\u8f93\u5165\u65f6\u949f\u3002(32\u4f4d\u7684\u79d2\u8ba1\u6570\u5668\uff0c\u663e\u71361\u79d2\u8981\u81ea\u589e1\u6b21\uff0c\u6240\u4ee5\u9700\u89811HZ\u7684\u4fe1\u53f7\u6765\u9a71\u52a8\u79d2\u8ba1\u6570\u5668\uff0c\u4f46\u662f\u5b9e\u9645\u63d0\u4f9b\u7ed9RTC\u6a21\u5757\u7684\u65f6\u949f\uff08RTCCLK\uff09\uff0c\u4e00\u822c\u9891\u7387\u90fd\u6bd4\u8f83\u9ad8\uff0c\u6240\u4ee5\u8981\u52a0\u4e00\u4e2aRTC\u9884\u5206\u9891\u5668)<\/p>\n
\u53ef\u9009\u62e9\u4e09\u79cdRTC\u65f6\u949f\u6e90\uff1a<\/p>\n
HSE\u65f6\u949f\u9664\u4ee5128\uff08\u901a\u5e38\u4e3a8MHz\/128\uff09<\/p>\n
LSE\u632f\u8361\u5668\u65f6\u949f\uff08\u901a\u5e38\u4e3a32.768KHz\uff09<\/p>\n
LSI\u632f\u8361\u5668\u65f6\u949f\uff0840KHz\uff09<\/p>\n
\u6700\u5e38\u7528\u7684\u662fLSE\uff0c\u4f4e\u901f\u5916\u90e8\u65f6\u949f\u4fe1\u53f7\u3002<\/p>\n
\u56e0\u4e3a32.768KHz\uff0c\u6b63\u597d\u662f2\u768415\u6b21\u65b9\uff0c\u53ea\u9700\u8981\u8bbe\u8ba1\u4e00\u4e2a2\u768415\u6b21\u65b9\u7684\u5bc4\u5b58\u5668\uff0c\u8ba9\u8ba1\u6570\u5668\u81ea\u7136\u6ea2\u51fa\uff0c\u4e0d\u7528\u8bbe\u5b9a\u76ee\u6807\u503c\uff0c\u8fd9\u6837\u5c31\u7b80\u5316\u4e86\u7535\u8def\u7684\u8bbe\u8ba1\u3002\u5e76\u4e14LSE\u662f\u4e13\u95e8\u7528\u4e8eRTC\u65f6\u949f\u6e90\u7684\u3002<\/p>\n
\u8fd8\u6709\u4e00\u4e2a\u66f4\u91cd\u8981\u7684\u539f\u56e0\u5c31\u662f\uff0c\u53ea\u6709LSE\u8fd9\u4e00\u8def\u7684\u65f6\u949f\uff0c\u53ef\u4ee5\u901a\u8fc7VBAT\u5907\u7528\u7535\u6c60\u4f9b\u7535\u3002<\/p>\n
\u6709\u7070\u8272\u586b\u5145\u7684\u533a\u57df\uff0c\u90fd\u662f\u540e\u5907\u533a\u57df\uff0c\u8fd9\u4e9b\u7535\u8def\u5728\u4e3b\u7535\u6e90\u6389\u7535\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528\u5907\u7528\u7535\u6c60\u7ef4\u6301\u5de5\u4f5c\uff0c\u8fd9\u4e9b\u6a21\u5757\u5728\u5f85\u673a\u65f6\u90fd\u4f1a\u7ee7\u7eed\u7ef4\u6301\u4f9b\u7535\u3002<\/p>\n
RTC\u8fd8\u8bbe\u8ba1\u6709\u4e00\u4e2a\u95f9\u949f\u5bc4\u5b58\u5668\uff08RTC_ALR\uff09\uff0c\u8fd9\u4e2aALR\u4e5f\u662f\u4e00\u4e2a32\u4f4d\u5bc4\u5b58\u5668\uff0c\u548c\u4e0a\u9762\u7684RTC_CNT\u662f\u7b49\u5bbd\u7684\uff0c\u5b83\u7684\u4f5c\u7528\u987e\u540d\u601d\u4e49\u5c31\u662f\u8bbe\u7f6e\u95f9\u949f\uff0c\u6211\u4eec\u53ef\u4ee5\u5728ALR\u5199\u4e00\u4e2a\u79d2\u6570\uff0c\u8bbe\u5b9a\u95f9\u949f\uff0c\u5f53CNT\u7684\u503c\u8ddfALR\u8bbe\u5b9a\u7684\u95f9\u949f\u503c\u4e00\u6837\u65f6\uff0c\u5c31\u4f1a\u4ea7\u751fRTC_Alarm\u4fe1\u53f7\uff0c\u901a\u5f80\u53f3\u8fb9\u7684\u4e2d\u65ad\u7cfb\u7edf\u3002\u540c\u65f6\u8fd9\u4e2a\u95f9\u949f\u4fe1\u53f7\u4e5f\u53ef\u4ee5\u8ba9STM32\u9000\u51fa\u5f85\u673a\u6a21\u5f0f\u3002<\/p>\n
\u6709\u4e09\u4e2a\u4fe1\u53f7\u53ef\u4ee5\u89e6\u53d1\u4e2d\u65ad\uff1a<\/p>\n
RTC_Second\uff0c\u79d2\u4e2d\u65ad\uff0c\u5b83\u7684\u6765\u6e90\uff0c\u5c31\u662fCNT\u7684\u8f93\u5165\u65f6\u949f\uff0c\u5982\u679c\u5f00\u542f\u8fd9\u4e2a\u4e2d\u65ad\uff0c\u7a0b\u5e8f\u5c31\u4f1a\u6bcf\u79d2\u8fdb\u4e00\u6b21RTC\u4e2d\u65ad\u3002<\/p>\n
RTC_Overflow\uff0c\u6ea2\u51fa\u4e2d\u65ad\uff0c\u610f\u601d\u5c31\u662f32\u4f4d\u8ba1\u6570\u5668\u8ba1\u6ee1\u6ea2\u51fa\u4e86\uff0c\u4f1a\u89e6\u53d1\u4e00\u6b21\u4e2d\u65ad\uff0c\u6240\u4ee5\u8fd9\u4e2a\u4e2d\u65ad\u4e00\u822c\u4e0d\u4f1a\u89e6\u53d1\u3002<\/p>\n
RTC_Alarm\uff0c\u95f9\u949f\u4e2d\u65ad\uff0c\u5f53\u8ba1\u6570\u5668\u548c\u95f9\u949f\u503c\u76f8\u7b49\u65f6\uff0c\u89e6\u53d1\u4e2d\u65ad\u3002<\/p>\n
\uff0c\u8fd9\u662fRTCCLK\u65f6\u949f\u6765\u6e90\uff0c\u9700\u8981\u5728RCC\u91cc\u914d\u7f6e\uff0c3\u4e2a\u65f6\u949f\uff0c\u9009\u62e91\u4e2a\uff0c\u5f53\u505aRTCCLK\u3002\u4e4b\u540eRTCCLK\u5148\u901a\u8fc7\u9884\u5206\u9891\u5668\uff0c\u5bf9\u65f6\u949f\u8fdb\u884c\u5206\u9891\u5f97\u52301HZ\u4fe1\u53f7\u3002<\/p>\n
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