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padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t<img decoding=\"async\" alt=\"AT89C51\u5355\u7247\u673a\u5bf9\u667a\u80fd\u8bed\u97f3\u62e8\u53f7\u62a5\u8b66\u7cfb\u7edf\u7684\u8bbe\u8ba1\" src=\"http:\/\/www.szryc.com\/uploads\/allimg\/190314\/1F60A130-0.png\" style=\"border: 0px; vertical-align: middle; cursor: pointer; margin: 0px auto; display: block; max-width: 100%; border-radius: 2px; width: 479px; height: 233px;\" \/><\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t16 \u8def\u89c6\u9891\u4e22\u5931\u68c0\u6d4b\u91c7\u96c6\u7535\u8def\u5982\u56fe3 \u6240\u793a\u3002\u8be5\u7535\u8def\u9996\u5148\u901a\u8fc7\u4e00\u724716 \u8def\u6a21\u62df\u5f00\u5173\u82af\u7247CD4067 \u8fdb\u884c\u89c6\u9891\u901a\u8def\u9009\u62e9\uff0c \u968f\u540e\u7ecf\u8fc7\u89c6\u9891\u4fe1\u53f7\u68c0\u6d4b\u7535\u8def\uff0c \u6700\u540e\u518d\u4e0eAT89C51 \u5355\u7247\u673a\u7684P1.3 \u53e3\u76f8\u63a5\u3002\u7cfb\u7edf\u9996\u5148\u5c06\u89c6\u9891\u901a\u8def\u53f7\u9001\u7ed9\u6a21\u62df\u5f00\u5173CD4067\uff0c \u7136\u540e\u5c06\u91c7\u96c6\u7684\u6570\u636e\u9001\u7ed9P1.3\u53e3\uff0c \u6765\u5224\u65ad\u89c6\u9891\u662f\u5426\u4e22\u5931\u3002<\/p>\n<p align=\"center\" style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t<img decoding=\"async\" alt=\"AT89C51\u5355\u7247\u673a\u5bf9\u667a\u80fd\u8bed\u97f3\u62e8\u53f7\u62a5\u8b66\u7cfb\u7edf\u7684\u8bbe\u8ba1\" src=\"http:\/\/www.szryc.com\/uploads\/allimg\/190314\/1F6063144-1.jpg\" style=\"border: 0px; vertical-align: middle; cursor: pointer; margin: 0px auto; display: block; max-width: 100%; border-radius: 2px;\" \/><\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t2.2 DTMF \u53d1\u9001\u63a5\u6536\u7535\u8defMT8880 \u4e0eAT89C51 \u53ca\u8bed\u97f3\u7535\u8def\u7684\u63a5\u53e3<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\tMT8880 \u662fMI<u>TE<\/u>L \u516c\u53f8\u63a8\u51fa\u7684\u4e13\u95e8\u7528\u4e8e\u5904\u7406DTMF \u4fe1\u53f7\u7684\u4e13\u7528\u96c6\u6210\u7535\u8def\u82af\u7247\uff0c \u4e0d\u4ec5\u5177\u6709\u63a5\u6536\u548c\u53d1\u9001DTMF\u4fe1\u53f7\u7684\u81ea\u52a8\u62e8\u53f7\u529f\u80fd\uff0c \u8fd8\u53ef\u4ee5\u68c0\u6d4b\u7535\u8bdd\u5e72\u7ebf\u4e0a\u62e8\u53f7\u97f3\u3001\u56de\u94c3\u97f3\u548c\u5fd9\u97f3\u7b49\u4fe1\u53f7\u97f3\u3002\u9002\u5408\u4e0e\u5355\u7247\u673a\u63a5\u53e3\uff0c \u5916\u56f4\u7535\u8def\u7b80\u5355\u3002<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\tMT8880 \u5185\u90e8\u6709\u4e94\u4e2a<u>\u5bc4\u5b58\u5668<\/u>\uff0c \u5206\u522b\u4e3a\u63a5\u6536\u6570\u636e\u5bc4\u5b58\u5668\u3001\u53d1\u9001\u6570\u636e\u5bc4\u5b58\u5668\u3001\u6536\u53d1\u63a7\u5236\u5bc4\u5b58\u5668CRA \u548cCRB \u4ee5\u53ca\u6536\u53d1\u72b6\u6001\u5bc4\u5b58\u5668\u3002\u5728\u672c\u8bbe\u8ba1\u4e2d\uff0c \u7531\u4e8e\u4ec5\u91c7\u7528\u53d1\u9001\u6570\u636e\u5bc4\u5b58\u5668\u3001\u6536\u53d1\u63a7\u5236\u5bc4\u5b58\u5668CRA \u548cCRB \u53d1\u9001DTMF \u4fe1\u53f7\u5b9e\u73b0\u81ea\u52a8\u62e8\u53f7\u529f\u80fd\uff0c \u56e0\u6b64\u5728\u6b64\u4ec5\u4ecb\u7ecd\u8fd9\u4e09\u4e2a\u5bc4\u5b58\u5668\u3002\u53d1\u9001\u6570\u636e\u5bc4\u5b58\u5668\u4e2d\u7684\u6570\u636e\u51b3\u5b9a\u8981\u53d1\u9001\u7684\u53cc\u97f3\u9891\u4fe1\u53f7\u7684\u9891\u7387\uff0c \u56e0\u6b64\u53ea\u80fd\u5411\u53d1\u9001\u6570\u636e\u5bc4\u5b58\u5668\u5199\u5165\u6570\u636e\u3002\u4e24\u4e2a\u6536\u53d1\u63a7\u5236\u5bc4\u5b58\u5668\u5360\u7528\u540c\u4e00\u4e2a\u5730\u5740\uff0c \u56e0\u6b64\u6839\u636eCRA \u4e2d\u7684\u5bc4\u5b58\u5668\u9009\u62e9\u4f4d\u7684\u503c\u51b3\u5b9a\u662f\u5426\u5bf9CRB \u8fdb\u884c\u64cd\u4f5c\u3002\u5176\u63a5\u53e3\u7535\u8def\u5982\u56fe4 \u6240\u793a\u3002<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\tISD1420 \u8bed\u97f3\u82af\u7247\u91c7\u7528\u76f4\u63a5\u6a21\u62df\u5b58\u50a8\u6280\u672f\uff0c \u4e14\u5f55\u653e\u97f3\u8d28\u6781\u597d\uff0c \u5e76\u6709\u4e00\u5b9a\u7684\u6df7\u54cd\u6548\u679c; \u5b83\u7684\u5916\u56f4\u5143\u4ef6\u7b80\u5355\uff0c \u4ec5\u9700\u7b80\u5355\u7684\u963b\u3001\u5bb9\u5668\u4ef6\u5373\u53ef\u7ec4\u6210\u7b80\u5355\u7684\u5f55\u3001\u653e\u97f3\u7535\u8def; \u65e0\u9700\u540e\u5907\u7535\u6e90\uff0c \u4fe1\u606f\u5b58\u50a8\u65f6\u95f4\u957f\uff0c \u4e0d\u9700\u8981\u4e13\u7528\u7684\u7f16\u7a0b\u5668\u53ca\u8bed\u97f3\u5f00\u53d1\u5668; \u5177\u6709\u8f83\u5f3a\u7684\u9009\u5740\u80fd\u529b\uff0c \u53ef\u628a\u5b58\u50a8\u5668\u5206\u6210160\u6bb5\u6765\u7ba1\u7406\uff0c \u5f62\u6210\u6700\u5c0f\u7684\u5f55\u653e\u65f6\u95f4\u4e3a125ms\u3002\u5176\u63a5\u53e3\u7535\u8def\u56fe\u5982\u56fe4 \u6240\u793a\u3002<\/p>\n<p align=\"center\" style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t<img decoding=\"async\" alt=\"AT89C51\u5355\u7247\u673a\u5bf9\u667a\u80fd\u8bed\u97f3\u62e8\u53f7\u62a5\u8b66\u7cfb\u7edf\u7684\u8bbe\u8ba1\" src=\"http:\/\/www.szryc.com\/uploads\/allimg\/190314\/1F60BP4-2.jpg\" style=\"border: 0px; vertical-align: middle; cursor: pointer; margin: 0px auto; display: block; max-width: 100%; border-radius: 2px;\" \/><\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u8bed\u97f3\u5206\u6bb5\u65b9\u6cd5\uff1a \u5730\u5740\u8f93\u5165\u7aefA0\uff5eA7 \u7531\u4f4e\u4f4d\u5411\u9ad8\u4f4d\u6392\u5217\uff0c \u6bcf\u4f4d\u5730\u5740\u4ee3\u8868125ms \u7684\u5bfb\u5740\uff0c 160 \u4e2a\u5730\u5740\u8986\u76d620s \u7684\u8bed\u97f3\u8303\u56f4\uff08 160&times;0.125s=20s \uff09 \uff0c \u5f55\u97f3\u53ca\u653e\u97f3\u529f\u80fd\u5747\u4ece\u8bbe\u5b9a\u7684\u8d77\u59cb\u5730\u5740\u5f00\u59cb\uff0c \u5f55\u97f3\u7ed3\u675f\u7531\u505c\u6b62\u64cd\u4f5c\u51b3\u5b9a\uff0c \u82af\u7247\u5185\u90e8\u5728\u8be5\u6bb5\u7684\u7ed3\u675f\u4f4d\u7f6e\u81ea\u52a8\u63d2\u5165\u7ed3\u675f\u6807\u5fd7\uff08 EOM\uff09 ; \u800c\u653e\u97f3\u65f6\u9047\u5230EOM \u6807\u5fd7\u5373\u81ea\u52a8\u505c\u6b62\u653e\u97f3\u3002\u5728\u672c\u8bbe\u8ba1\u4e2d\uff0c \u56e0\u9700\u8981\u56db\u6bb5\u62a5\u8b66\u63d0\u793a\u8bed\u97f3\uff0c \u56e0\u6b64\u5728\u8bbe\u8ba1\u65f6\u5747\u5c06\u6bcf\u6bb5\u8bed\u97f3\u8bbe\u4e3a5s\uff0c\u5176\u8d77\u59cb\u5730\u5740\u5206\u522b\u4e3a00000000B\u300100101000B\u300101010000B\u300101111000B\uff0c \u7531\u8fd9\u56db\u6bb5\u8d77\u59cb\u5730\u5740\u53ef\u4ee5\u770b\u51faA7\u3001A2\u3001A1 \u548cA0 \u5747\u4e3a0\uff0c \u56e0\u6b64\u5c06\u5176\u63a5\u5730\u3002<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t3 \u8f6f\u4ef6\u8bbe\u8ba1<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t3.1 \u4fe1\u53f7\u97f3\u7684\u8bc6\u522b\u65b9\u6cd5<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u7cfb\u7edf\u5728\u5de1\u68c0\u5230\u8b66\u60c5\u4fe1\u53f7\u540e\u5c31\u6a21\u62df\u6458\u673a\u3002\u4e3a\u4e86\u8bc6\u522b\u6a21\u62df\u6458\u673a\u540e\u7535\u8bdd\u7cfb\u7edf\u662f\u5426\u5904\u4e8e\u53ef\u62e8\u53f7\u7684\u72b6\u6001\u3001\u7535\u8bdd\u62e8\u5b8c\u53f7\u7801\u540e\u7535\u8bdd\u662f\u5426\u63a5\u901a\u4ee5\u53ca\u5bf9\u65b9\u662f\u5426\u6458\u673a\u63a5\u542c\u7535\u8bdd\u7b49\u51e0\u79cd\u72b6\u6001\uff0c \u7cfb\u7edf\u5fc5\u987b\u8fdb\u884c\u4fe1\u53f7\u97f3\u7684\u8bc6\u522b\u3002\u4e3a\u4e86\u8bc6\u522b\u4fe1\u53f7\u97f3\uff0c \u5fc5\u987b\u77e5\u9053\u5404\u79cd\u4fe1\u53f7\u97f3\u7684\u7279\u6027\u3002\u5404\u79cd\u4fe1\u53f7\u97f3\u7279\u6027\u5982\u4e0b\uff1a<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u62e8\u53f7\u97f3\uff1a 450&plusmn;25Hz \u8fde\u7eed\u8702\u97f3;<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u5fd9\u97f3\uff1a 0.35s \u65ad0.35s \u901a\u7684450&plusmn;25Hz \u8702\u97f3\uff0c \u97f3\u65ad\u5468\u671f\u4e3a0.7s ;<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u56de\u94c3\u97f3\uff1a 4s \u65ad1s \u901a\u7684450&plusmn;25Hz \u8702\u97f3\uff0c \u97f3\u65ad\u5468\u671f\u4e3a5s\u3002<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u8fd9\u4e9b\u7535\u8bdd\u4fe1\u53f7\u5747\u662f\u6a21\u62df\u4fe1\u53f7\uff0c \u7136\u800c\u5355\u7247\u673a\u662f\u65e0\u6cd5\u8bc6\u522b\u6a21\u62df\u4fe1\u53f7\u7684\uff0c \u6545\u5fc5\u987b\u5148\u5c06\u6a21\u62df\u4fe1\u53f7\u8f6c\u6362\u4e3a\u8109\u51b2\u4fe1\u53f7\uff0c\u7136\u540e\u518d\u6839\u636e\u8109\u51b2\u4fe1\u53f7\u7684\u8109\u51b2\u4e2a\u6570\u8fdb\u884c\u8bc6\u522b\u3002\u8fd9\u4e9b\u7535\u8bdd\u97f3\u9891\u4fe1\u53f7\u7684\u8109\u51b2\u4e2a\u6570\u53ef\u7528\u4e0b\u5f0f\u8ba1\u7b97\uff1a<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\tN=tm\/T<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u5f0f\u4e2d\uff0c N \u4e3a\u6bcf\u97f3\u6bb5\u5468\u671f\u7684\u8109\u51b2\u4e2a\u6570; T \u4e3a\u7535\u8bdd\u97f3\u9891\u4fe1\u53f7\u7684\u97f3\u9891\u5468\u671f\uff0c \u5355\u4f4d\u4e3as ; tm \u4e3a\u4fe1\u53f7\u97f3\u65ad\u5468\u671f\u7684\u901a\u65f6\u95f4\uff0c \u5355\u4f4d\u4e3as\u3002<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u5728\u5b9e\u9645\u4f7f\u7528\u4e2d\uff0c \u4e3b\u8981\u9700\u8981\u8bc6\u522b\u62e8\u53f7\u97f3\u3001\u5fd9\u97f3\u548c\u56de\u94c3\u97f3\u3002\u5206\u6790\u8fd9\u4e09\u79cd\u4fe1\u53f7\u7684\u7279\u6027\u53ef\u4ee5\u770b\u51fa\uff0c \u5728\u4e00\u5b9a\u7684\u8ba1\u6570\u65f6\u95f4\u5185\uff0c \u5176\u8109\u51b2\u4e2a\u6570\u662f\u4e0d\u4e00\u6837\u7684\u3002\u5728\u8bbe\u8ba1\u4e4b\u521d\uff0c \u8003\u8651\u91c7\u75285s \u4e3a\u4e00\u4e2a\u8ba1\u6570\u5355\u4f4d\u6765\u5224\u65ad\u8fd9\u4e09\u79cd\u4fe1\u53f7\u97f3\uff0c \u4f46\u901a\u8fc7\u5b9e\u9645\u7684\u8c03\u8bd5\u53d1\u73b0\uff1a \u5f53\u5bf9\u65b9\u6458\u673a\u65f6\uff0c \u8981\u7b49\u5f85\u4e00\u6bb5\u65f6\u95f4\u624d\u80fd\u542c\u5230\u62a5\u8b66\u8bed\u97f3\u3002\u901a\u8fc7\u53cd\u590d\u7814\u7a76\u53ca\u8c03\u8bd5\uff0c \u6700\u7ec8\u91c7\u75282s \u8ba1\u6570\u5224\u65ad\u62e8\u53f7\u97f3\uff0c \u91c7\u75282.8s \uff08 \u53734 \u4e2a\u5fd9\u97f3\u5468\u671f\uff09 \u5224\u65ad\u662f\u5426\u4e3a\u5fd9\u97f3\uff0c \u82e5\u5426\u5219\u4ee3\u8868\u7535\u8bdd\u62e8\u901a\u4e86\u3002\u968f\u540e\u91c7\u75281s \u4e3a\u4e00\u4e2a\u8ba1\u6570\u5355\u5143\uff0c \u91c7\u7528\u8ba1\u4e94\u6b21\u540e\u7684\u7d2f\u52a0\u8109\u51b2\u6570\u6765\u5224\u65ad\u5bf9\u65b9\u662f\u5426\u63a5\u542c\u7535\u8bdd\u3002\u82e5\u6709\uff0c \u5219\u653e\u76f8\u5e94\u7684\u62a5\u8b66\u63d0\u793a\u8bed\u97f3; \u5426\u5219\u518d\u8ba11s \uff0c \u7136\u540e\u8ba1\u7b97\u6700\u540e5s \u5185\u7684\u8109\u51b2\u6570\uff0c \u518d\u6b21\u5224\u65ad\u5bf9\u65b9\u662f\u5426\u6458\u673a\u3002\u5982\u6b64\u53cd\u590d\uff0c \u76f4\u5230\u8d85\u8fc7\u7b49\u5f85\u65f6\u95f4\u4ecd\u6ca1\u6709\u4eba\u63a5\u542c\u7535\u8bdd\u5c31\u6302\u673a\u3002\u7531\u4e8e\u5e72\u6270\u548c\u4e00\u4e9b\u5176\u4ed6\u56e0\u7d20\u7684\u5b58\u5728\uff0c \u96be\u514d\u4f1a\u6709\u8bef\u5224\u7684\u73b0\u8c61\u800c\u5bfc\u81f4\u6f0f\u62a5\u8b66\u60c5\u3002\u56e0\u6b64\u91c7\u53d6\u5728\u6240\u6709\u9884\u5148\u8bbe\u5b9a\u7684\u7535\u8bdd\u81f3\u5c11\u6709\u4e00\u4e2a\u62e8\u901a\u5c31\u53ea\u62e8\u4e00\u904d\uff0c \u5982\u679c\u5168\u90e8\u6ca1\u62e8\u901a\u6216\u8005\u6ca1\u4eba\u63a5\u542c\u5219\u628a\u6240\u6709\u9884\u5b58\u7535\u8bdd\u91cd\u62e8\u4e00\u8fb9\uff0c \u8fd9\u6837\u6f0f\u62a5\u62a5\u8b66\u7684\u6982\u7387\u5c31\u975e\u5e38\u4f4e\u4ee5\u81f4\u53ef\u5ffd\u7565\u4e0d\u8ba1\u3002<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t3.2 \u8f6f\u4ef6\u8bbe\u7f6e<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u81ea\u52a8\u62e8\u53f7\u7a0b\u5e8f\u7684\u6d41\u7a0b\u56fe\u5982\u56fe5 \u6240\u793a\u3002\u4e0b\u9762\u662f\u81ea\u52a8\u62e8\u53f7\u7684\u90e8\u5206\u7a0b\u5e8f \u3002<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\tAUTOCALL\uff1a CLR P1.2 ;\u6a21\u62df\u6458\u673a<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\tMOV A\uff0c#5DH ;\u5141\u8bb8\u4fe1\u53f7\u97f3\u8f93\u51fa\uff0c \u4e0b\u4e00\u6b21\u4e3a\u5199\u63a7\u5236\u5bc4\u5b58\u5668CRB<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\tMOVX @DPTR\uff0cA ;\u5199\u63a7\u5236\u5bc4\u5b58\u5668CRA<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\tMOV A\uff0c#51H ;MT8880 \u7f6e\u4e3a\u7a81\u53d1\u6a21\u5f0f<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\tMOVX @DPTR\uff0cA ;\u5199\u63a7\u5236\u5bc4\u5b58\u5668CRB<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\tMOV A\uff0c#56H ;MT8880 \u7f6e\u4e3a\u547c\u53eb\u6a21\u5f0f<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\tMOVX @DPTR\uff0cA ;\u5199\u63a7\u5236\u5bc4\u5b58\u5668CRA<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\tLCALL DELAY<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\tLCALL AUTOY ;\u8c03\u7528\u4fe1\u53f7\u97f3\u5224\u522b\u5b50\u7a0b\u5e8f\uff0c \u770b\u662f\u5426\u6709\u62e8\u53f7\u97f3<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\tMOV A\uff0c#5DH ;\u5141\u8bb8\u4fe1\u53f7\u97f3\u8f93\u51fa\uff0c \u4e0b\u4e00\u6b21\u4e3a\u5199\u63a7\u5236\u5bc4\u5b58\u5668CRB<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\tMOVX @DPTR\uff0cA ;\u5199\u63a7\u5236\u5bc4\u5b58\u5668CRA<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\tMOV A\uff0c#50H ;MT8880 \u7f6e\u4e3a\u7a81\u53d1\u6a21\u5f0f<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\tMOVX @DPTR\uff0cA ;\u5199\u63a7\u5236\u5bc4\u5b58\u5668CRB<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t&hellip;&hellip; ;\u62e8\u7535\u8bdd\u53f7\u7801<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\tMOV A\uff0c#56H ;MT8880 \u7f6e\u4e3a\u547c\u53eb\u6a21\u5f0f<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\tMOVX @DPTR\uff0cA ;\u5199\u63a7\u5236\u5bc4\u5b58\u5668CRA<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\tLCALL AUTOY ;\u8c03\u7528\u4fe1\u53f7\u97f3\u5224\u522b\u5b50\u7a0b\u5e8f\uff0c \u770b\u662f\u5426\u6709\u56de\u94c3\u97f3<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\tLCALL AUTOY ;\u8c03\u7528\u4fe1\u53f7\u97f3\u5224\u522b\u5b50\u7a0b\u5e8f\uff0c \u770b\u5bf9\u65b9\u662f\u5426\u6458\u673a<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\tSETB P1.2 ;\u6a21\u62df\u6302\u673a<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t3.3 \u7f16\u7a0b\u8fc7\u7a0b\u4e2d\u5e94\u6ce8\u610f\u7684\u51e0\u70b9<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; word-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-indent: 2em; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u9996\u5148\uff0c MT8880 \u7684DTMF \u4ea7\u751f\u5668\u662f\u53d1\u9001\u90e8\u5206\u7684\u4e3b\u4f53\uff0c\u5b83\u4ea7\u751f\u5168\u90e8\u5341\u516d\u79cd\u5931\u771f\u5c0f\u3001\u7cbe\u5ea6\u9ad8\u7684\u6807\u51c6\u53cc\u97f3\u9891\u4fe1\u53f7\uff0c\u8fd9\u4e9b\u9891\u7387\u5747\u75313.579545MHz \u6676\u4f53<u>\u632f\u8361\u5668<\/u>\u5206\u9891\u4ea7\u751f\u3002\u7535\u8def\u7531\u6570\u5b57\u9891\u7387\u5408\u6210\u5668\u3001\u884c\/ \u5217\u53ef\u7f16\u7a0b\u5206\u9891\u5668\u3001\u5f00\u5173<u>\u7535\u5bb9<\/u>\u5f0fD\/A\u53d8\u6362\u5668\u7ec4\u6210\u3002\u884c\u548c\u5217\u5355\u97f3\u6b63\u5f26\u6ce2\u7ecf\u6df7\u5408\u3001\u6ee4\u6ce2\u540e\u4ea7\u751f\u53cc\u97f3\u9891\u4fe1\u53f7\u3002\u901a\u8fc7DTMF \u7f16\u89e3\u7801\u8868\u628a\u7f16\u7801\u6570\u636e\u5199\u5165MT8880 \u53d1\u9001\u5bc4\u5b58\u5668\u4ea7\u751f\u5355\u72ec\u7684fLOW \u548cfHIGH\uff0c \u4e00\u65e6\u7f16\u7801\u9519\u8bef\u5c31\u4f1a\u5bfc\u81f4\u62e8\u53f7\u5931\u8d25\uff0c \u6545\u5728\u7f16\u7a0b\u8fc7\u7a0b\u4e2d\u8981\u5341\u5206\u5c0f\u5fc3\u3002\u5176\u7f16\u89e3\u7801\u8868\u89c1MT8880 \u7684Datasheet \u3002<\/p>\n<p style=\"margin: 0px 0px 12px; 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