\n\tIIC vs SPI<\/u><\/p>\n
\n\t\u73b0\u4eca\uff0c\u5728\u4f4e\u7aef\u6570\u5b57\u901a\u4fe1\u5e94\u7528\u9886\u57df\uff0c\u6211\u4eec\u968f\u5904\u53ef\u89c1IIC \uff08Inte<\/u>r-Integrated Circuit\uff09 \u548c SPI \uff08Serial Peripheral Interface\uff09\u7684\u8eab\u5f71\u3002\u539f\u56e0\u662f\u8fd9\u4e24\u79cd\u901a\u4fe1\u534f\u8bae\u975e\u5e38\u9002\u5408\u8fd1\u8ddd\u79bb\u4f4e\u901f\u82af\u7247\u95f4\u901a\u4fe1\u3002Philips\uff08for IIC\uff09\u548cMotorola\uff08for SPI\uff09 \u51fa\u4e8e\u4e0d\u540c\u80cc\u666f\u548c\u5e02\u573a\u9700\u6c42\u5236\u5b9a\u4e86\u8fd9\u4e24\u79cd\u6807\u51c6\u901a\u4fe1\u534f\u8bae\u3002<\/p>\n<\/p>\n
\n\t\u4e3a\u4e86\u8282\u7701\u5fae\u63a7\u5236\u5668\u7684\u5f15\u811a\u548c\u548c\u989d\u5916\u7684\u903b\u8f91\u82af\u7247<\/u>\uff0c\u4f7f\u5370\u5237\u7535\u8def\u677f<\/u>\u66f4\u7b80\u5355\uff0c\u6210\u672c\u66f4\u4f4e\uff0c\u4f4d\u4e8e\u8377\u5170\u7684Philips\u5b9e\u9a8c\u5ba4\u5f00\u53d1\u4e86 \u2018Inter-Integrated Circuit\u2019\uff0cIIC \u6216 IIC \uff0c\u4e00\u79cd\u53ea\u4f7f\u7528\u4e8c\u6839\u7ebf\u63a5\u8fde\u6240\u6709\u5916\u56f4\u82af\u7247\u7684\u603b\u7ebf\u534f\u8bae\u3002\u6700\u521d\u7684\u6807\u51c6\u5b9a\u4e49\u603b\u7ebf\u901f\u5ea6\u4e3a100kbps\u3002\u7ecf\u5386\u51e0\u6b21\u4fee\u8ba2\uff0c\u4e3b\u8981\u662f1995\u5e74\u7684400kbps\uff0c1998\u76843.4Mbps\u3002<\/p>\n
\n\t\u6709\u8ff9\u8c61\u8868\u660e\uff0cSPI\u603b\u7ebf\u9996\u6b21\u63a8\u51fa\u662f\u57281979\u5e74\uff0cMotorola\u516c\u53f8\u5c06SPI\u603b\u7ebf\u96c6\u6210\u5728\u4ed6\u4eec\u7b2c\u4e00\u652f\u6539\u81ea68000\u5fae\u5904\u7406\u5668\u7684\u5fae\u63a7\u5236\u5668\u82af\u7247\u4e0a\u3002SPI\u603b\u7ebf\u662f\u5fae\u63a7\u5236\u5668\u56db\u7ebf\u7684\u5916\u90e8\u603b\u7ebf\uff08\u76f8\u5bf9\u4e8e\u5185\u90e8\u603b\u7ebf\uff09\u3002\u4e0eIIC\u4e0d\u540c\uff0cSPI\u6ca1\u6709\u660e\u6587\u6807\u51c6\uff0c\u53ea\u662f\u4e00\u79cd\u4e8b\u5b9e\u6807\u51c6\uff0c\u5bf9\u901a\u4fe1\u64cd\u4f5c\u7684\u5b9e\u73b0\u53ea\u4f5c\u4e00\u822c\u7684\u62bd\u8c61\u63cf\u8ff0\uff0c\u82af\u7247\u5382\u5546\u4e0e\u9a71\u52a8\u5f00\u53d1\u8005\u901a\u8fc7data sheets\u548capplication notes\u6c9f\u901a\u5b9e\u73b0\u4e0a\u7684\u7ec6\u8282\u3002<\/p>\n
\n\tSPI<\/p>\n
\n\t\u5bf9\u4e8e\u6709\u7ecf\u9a8c\u7684\u6570\u5b57\u7535\u5b50\u5de5\u7a0b\u5e08\u6765\u8bf4\uff0c\u7528SPI\u4e92\u8054\u4e24\u652f\u6570\u5b57\u8bbe\u5907\u662f\u76f8\u5f53\u76f4\u89c2\u7684\u3002SPI\u662f\u79cd\u56db\u6839\u4fe1\u53f7\u7ebf<\/u>\u534f\u8bae\uff08\u5982\u56fe\uff09\uff1a<\/p>\n
\n
\n\tSCLK\uff1a Serial Clock \uff08output from master\uff09;<\/p>\n
\n\tMOSI; SIMO\uff1a Master Output\uff0c Slave Input\uff08output from master\uff09;<\/p>\n
\n\tMI<\/u>SO; SOMI\uff1a Master Input\uff0c Slave Output\uff08output from slave\uff09;<\/p>\n
\n\tSS\uff1a Slave Select \uff08active low\uff0c outputfrom master\uff09\u3002<\/p>\n
\n\tSPI\u662f\uff3b\u5355\u4e3b\u8bbe\u5907\uff08 single-master \uff09\uff3d\u901a\u4fe1\u534f\u8bae\uff0c\u8fd9\u610f\u5473\u7740\u603b\u7ebf\u4e2d\u7684\u53ea\u6709\u4e00\u652f\u4e2d\u5fc3\u8bbe\u5907\u80fd\u53d1\u8d77\u901a\u4fe1\u3002\u5f53SPI\u4e3b\u8bbe\u5907\u60f3\u8bfb\/\u5199\uff3b\u4ece\u8bbe\u5907\uff3d\u65f6\uff0c\u5b83\u9996\u5148\u62c9\u4f4e\uff3b\u4ece\u8bbe\u5907\uff3d\u5bf9\u5e94\u7684SS\u7ebf\uff08SS\u662f\u4f4e\u7535\u5e73\u6709\u6548\uff09\uff0c\u63a5\u7740\u5f00\u59cb\u53d1\u9001\u5de5\u4f5c\u8109\u51b2\u5230\u65f6\u949f<\/u>\u7ebf\u4e0a\uff0c\u5728\u76f8\u5e94\u7684\u8109\u51b2\u65f6\u95f4\u4e0a\uff0c\uff3b\u4e3b\u8bbe\u5907\uff3d\u628a\u4fe1\u53f7\u53d1\u5230MOSI\u5b9e\u73b0\u201c\u5199\u201d\uff0c\u540c\u65f6\u53ef\u5bf9MISO\u91c7\u6837\u800c\u5b9e\u73b0\u201c\u8bfb\u201d\uff0c\u5982\u4e0b\u56fe\uff1a<\/p>\n
\n\t<\/p>\n
\n\tSPI\u6709\u56db\u79cd\u64cd\u4f5c\u6a21\u5f0f\u2014\u2014\u6a21\u5f0f0\u3001\u6a21\u5f0f1\u3001\u6a21\u5f0f2\u548c\u6a21\u5f0f3\uff0c\u5b83\u4eec\u7684\u533a\u522b\u662f\u5b9a\u4e49\u4e86\u5728\u65f6\u949f\u8109\u51b2\u7684\u54ea\u6761\u8fb9\u6cbf\u8f6c\u6362\uff08toggles\uff09\u8f93\u51fa\u4fe1\u53f7\uff0c\u54ea\u6761\u8fb9\u6cbf\u91c7\u6837\u8f93\u5165\u4fe1\u53f7\uff0c\u8fd8\u6709\u65f6\u949f\u8109\u51b2\u7684\u7a33\u5b9a\u7535\u5e73\u503c\uff08\u5c31\u662f\u65f6\u949f\u4fe1\u53f7\u65e0\u6548\u65f6\u662f\u9ad8\u8fd8\u662f\u4f4e\uff09\u3002\u6bcf\u79cd\u6a21\u5f0f\u7531\u4e00\u5bf9\u53c2\u6570\u523b\u753b\uff0c\u5b83\u4eec\u79f0\u4e3a\u65f6\u949f\u6781\uff08clock polarity\uff09CPOL\u4e0e\u65f6\u949f\u671f\uff08clock phase\uff09CPHA\u3002<\/p>\n
\n\t<\/p>\n
\n\t\uff3b\u4e3b\u4ece\u8bbe\u5907\uff3d\u5fc5\u987b\u4f7f\u7528\u76f8\u540c\u7684\u5de5\u4f5c\u53c2\u6570\u2014\u2014SCLK\u3001CPOL \u548c CPHA\uff0c\u624d\u80fd\u6b63\u5e38\u5de5\u4f5c\u3002\u5982\u679c\u6709\u591a\u4e2a\uff3b\u4ece\u8bbe\u5907\uff3d\uff0c\u5e76\u4e14\u5b83\u4eec\u4f7f\u7528\u4e86\u4e0d\u540c\u7684\u5de5\u4f5c\u53c2\u6570\uff0c\u90a3\u4e48\uff3b\u4e3b\u8bbe\u5907\uff3d\u5fc5\u987b\u5728\u8bfb\u5199\u4e0d\u540c\uff3b\u4ece\u8bbe\u5907\uff3d\u95f4\u91cd\u65b0\u914d\u7f6e\u8fd9\u4e9b\u53c2\u6570\u3002\u4ee5\u4e0aSPI\u603b\u7ebf\u534f\u8bae\u7684\u4e3b\u8981\u5185\u5bb9\u3002SPI\u4e0d\u89c4\u5b9a\u6700\u5927\u4f20\u8f93\u901f\u7387\uff0c\u6ca1\u6709\u5730\u5740\u65b9\u6848\uff1bSPI\u4e5f\u6ca1\u89c4\u5b9a\u901a\u4fe1\u5e94\u7b54\u673a\u5236\uff0c\u6ca1\u6709\u89c4\u5b9a\u6d41\u63a7\u5236\u89c4\u5219\u3002\u4e8b\u5b9e\u4e0a\uff0cSPI\uff3b\u4e3b\u8bbe\u5907\uff3d\u751a\u81f3\u5e76\u4e0d\u77e5\u9053\u6307\u5b9a\u7684\uff3b\u4ece\u8bbe\u5907\uff3d\u662f\u5426\u5b58\u5728\u3002\u8fd9\u4e9b\u901a\u4fe1\u63a7\u5236\u90fd\u5f97\u901a\u8fc7SPI\u534f\u8bae\u4ee5\u5916\u81ea\u884c\u5b9e\u73b0\u3002\u4f8b\u5982\uff0c\u8981\u7528SPI\u8fde\u63a5\u4e00\u652f\uff3b\u547d\u4ee4-\u54cd\u5e94\u63a7\u5236\u578b\uff3d\u89e3\u7801\u82af\u7247\uff0c\u5219\u5fc5\u987b\u5728SPI\u7684\u57fa\u7840\u4e0a\u5b9e\u73b0\u66f4\u9ad8\u7ea7\u7684\u901a\u4fe1\u534f\u8bae\u3002SPI\u5e76\u4e0d\u5173\u5fc3\u7269\u7406\u63a5\u53e3<\/u>\u7684\u7535\u6c14\u7279\u6027\uff0c\u4f8b\u5982\u4fe1\u53f7\u7684\u6807\u51c6\u7535\u538b\u3002\u5728\u6700\u521d\uff0c\u5927\u591a\u6570SPI\u5e94\u7528\u90fd\u662f\u4f7f\u7528\u95f4\u65ad\u6027\u65f6\u949f\u8109\u51b2\u548c\u4ee5\u5b57\u8282\u4e3a\u5355\u4f4d\u4f20\u8f93\u6570\u636e\u7684\uff0c\u4f46\u73b0\u5728\u6709\u5f88\u591a\u53d8\u79cd\u5b9e\u73b0\u4e86\u8fde\u7eed\u6027\u65f6\u95f4\u8109\u51b2\u548c\u4efb\u610f\u957f\u5ea6\u7684\u6570\u636e\u5e27\u3002<\/p>\n
\n\tIIC<\/p>\n
\n\t\u4e0eSPI\u7684\u5355\u4e3b\u8bbe\u5907\u4e0d\u540c\uff0cIIC \u662f\u591a\u4e3b\u8bbe\u5907\u7684\u603b\u7ebf\uff0cIIC\u6ca1\u6709\u7269\u7406\u7684\u82af\u7247\u9009\u62e9\u4fe1\u53f7\u7ebf\uff0c\u6ca1\u6709\u4ef2\u88c1\u903b\u8f91\u7535\u8def<\/u>\uff0c\u53ea\u4f7f\u7528\u4e24\u6761\u4fe1\u53f7\u7ebf\u2014\u2014 \u2018serial data\u2019 \uff08SDA\uff09 \u548c \u2018serial clock\u2019 \uff08SCL\uff09\u3002IIC\u534f\u8bae\u89c4\u5b9a\uff1a<\/p>\n
\n\t\u7b2c\u4e00\uff0c\u6bcf\u4e00\u652fIIC\u8bbe\u5907\u90fd\u6709\u4e00\u4e2a\u552f\u4e00\u7684\u4e03\u4f4d\u8bbe\u5907\u5730\u5740\uff1b<\/p>\n
\n\t\u7b2c\u4e8c\uff0c\u6570\u636e\u5e27\u5927\u5c0f\u4e3a8\u4f4d\u7684\u5b57\u8282\uff1b<\/p>\n
\n\t\u7b2c\u4e09\uff0c\u6570\u636e\uff08\u5e27\uff09\u4e2d\u7684\u67d0\u4e9b\u6570\u636e\u4f4d\u7528\u4e8e\u63a7\u5236\u901a\u4fe1\u7684\u5f00\u59cb\u3001\u505c\u6b62\u3001\u65b9\u5411\uff08\u8bfb\u5199\uff09\u548c\u5e94\u7b54\u673a\u5236\u3002<\/p>\n
\n\tIIC \u6570\u636e\u4f20\u8f93\u901f\u7387\u6709\u6807\u51c6\u6a21\u5f0f\uff08100 kbps\uff09\u3001\u5feb\u901f\u6a21\u5f0f\uff08400 kbps\uff09\u548c\u9ad8\u901f\u6a21\u5f0f\uff083.4 Mbps\uff09\uff0c\u53e6\u5916\u4e00\u4e9b\u53d8\u79cd\u5b9e\u73b0\u4e86\u4f4e\u901f\u6a21\u5f0f\uff0810 kbps\uff09\u548c\u5feb\u901f+\u6a21\u5f0f\uff081 Mbps\uff09\u3002<\/p>\n
\n\t\u7269\u7406\u5b9e\u73b0\u4e0a\uff0cIIC \u603b\u7ebf\u7531\u4e24\u6839\u4fe1\u53f7\u7ebf\u548c\u4e00\u6839\u5730\u7ebf\u7ec4\u6210\u3002\u4e24\u6839\u4fe1\u53f7\u7ebf\u90fd\u662f\u53cc\u5411\u4f20\u8f93\u7684\uff0c\u53c2\u8003\u4e0b\u56fe\u3002IIC\u534f\u8bae\u6807\u51c6\u89c4\u5b9a\u53d1\u8d77\u901a\u4fe1\u7684\u8bbe\u5907\u79f0\u4e3a\u4e3b\u8bbe\u5907\uff0c\u4e3b\u8bbe\u5907\u53d1\u8d77\u4e00\u6b21\u901a\u4fe1\u540e\uff0c\u5176\u5b83\u8bbe\u5907\u5747\u4e3a\u4ece\u8bbe\u5907\u3002<\/p>\n
\n\t<\/p>\n
\n\tIIC \u901a\u4fe1\u8fc7\u7a0b\u5927\u6982\u5982\u4e0b\u3002\u9996\u5148\uff0c\u4e3b\u8bbe\u5907\u53d1\u4e00\u4e2aSTART\u4fe1\u53f7\uff0c\u8fd9\u4e2a\u4fe1\u53f7\u5c31\u50cf\u5bf9\u6240\u6709\u5176\u5b83\u8bbe\u5907\u558a\uff1a\u8bf7\u5927\u5bb6\u6ce8\u610f\uff01\u7136\u540e\u5176\u5b83\u8bbe\u5907\u5f00\u59cb\u76d1\u542c\u603b\u7ebf\u4ee5\u51c6\u5907\u63a5\u6536\u6570\u636e\u3002\u63a5\u7740\uff0c\u4e3b\u8bbe\u5907\u53d1\u9001\u4e00\u4e2a7\u4f4d\u8bbe\u5907\u5730\u5740\u52a0\u4e00\u4f4d\u7684\u8bfb\u5199\u64cd\u4f5c\u7684\u6570\u636e\u5e27\u3002\u5f53\u6240\u8bbe\u5907\u63a5\u6536\u6570\u636e\u540e\uff0c\u6bd4\u5bf9\u5730\u5740\u81ea\u5df1\u662f\u5426\u76ee\u6807\u8bbe\u5907\u3002\u5982\u679c\u6bd4\u5bf9\u4e0d\u7b26\uff0c\u8bbe\u5907\u8fdb\u5165\u7b49\u5f85\u72b6\u6001\uff0c\u7b49\u5f85STOP\u4fe1\u53f7\u7684\u6765\u4e34\uff1b\u5982\u679c\u6bd4\u5bf9\u76f8\u7b26\uff0c\u8bbe\u5907\u4f1a\u53d1\u9001\u4e00\u4e2a\u5e94\u7b54\u4fe1\u53f7\u2014\u2014ACKNOWLED<\/u>GE\u4f5c\u56de\u5e94\u3002<\/p>\n
\n\t\u5f53\u4e3b\u8bbe\u5907\u6536\u5230\u5e94\u7b54\u540e\u4fbf\u5f00\u59cb\u4f20\u9001\u6216\u63a5\u6536\u6570\u636e\u3002\u6570\u636e\u5e27\u5927\u5c0f\u4e3a8\u4f4d\uff0c\u5c3e\u968f\u4e00\u4f4d\u7684\u5e94\u7b54\u4fe1\u53f7\u3002\u4e3b\u8bbe\u5907\u53d1\u9001\u6570\u636e\uff0c\u4ece\u8bbe\u5907\u5e94\u7b54\uff1b\u76f8\u53cd\u4e3b\u8bbe\u5907\u63a5\u6570\u636e\uff0c\u4e3b\u8bbe\u5907\u5e94\u7b54\u3002\u5f53\u6570\u636e\u4f20\u9001\u5b8c\u6bd5\uff0c\u4e3b\u8bbe\u5907\u53d1\u9001\u4e00\u4e2aSTOP\u4fe1\u53f7\uff0c\u5411\u5176\u5b83\u8bbe\u5907\u5ba3\u544a\u91ca\u653e\u603b\u7ebf\uff0c\u5176\u5b83\u8bbe\u5907\u56de\u5230\u521d\u59cb\u72b6\u6001\u3002<\/p>\n
\n\t<\/p>\n
\n\t\u57fa\u4e8eIIC\u603b\u7ebf\u7684\u7269\u7406\u7ed3\u6784\uff0c\u603b\u7ebf\u4e0a\u7684START\u548cSTOP\u4fe1\u53f7\u5fc5\u5b9a\u662f\u552f\u4e00\u7684\u3002\u53e6\u5916\uff0cIIC\u603b\u7ebf\u6807\u51c6\u89c4\u5b9aSDA\u7ebf\u7684\u6570\u636e\u8f6c\u6362\u5fc5\u987b\u5728SCL\u7ebf\u7684\u4f4e\u7535\u5e73\u671f\uff0c\u5728SCL\u7ebf\u7684\u9ad8\u7535\u5e73\u671f\uff0cSDA\u7ebf\u7684\u4e0a\u6570\u636e\u662f\u7a33\u5b9a\u7684\u3002<\/p>\n
\n\t<\/p>\n
\n\t\u5728\u7269\u7406\u5b9e\u73b0\u4e0a\uff0cSCL\u7ebf\u548cSDA\u7ebf\u90fd\u662f\u6f0f\u6781\u5f00\u8def\uff08open-drain\uff09\uff0c\u901a\u8fc7\u4e0a\u62c9\u7535\u963b<\/u>\u5916\u52a0\u4e00\u4e2a\u7535\u538b\u6e90\u3002\u5f53\u628a\u7ebf\u8def\u63a5\u5730\u65f6\uff0c\u7ebf\u8def\u4e3a\u903b\u8f910\uff0c\u5f53\u91ca\u653e\u7ebf\u8def\uff0c\u7ebf\u8def\u7a7a\u95f2\u65f6\uff0c\u7ebf\u8def\u4e3a\u903b\u8f911\u3002\u57fa\u4e8e\u8fd9\u4e9b\u7279\u6027\uff0cIIC\u8bbe\u5907\u5bf9\u603b\u7ebf\u7684\u64cd\u4f5c\u4ec5\u6709\u201c\u628a\u7ebf\u8def\u63a5\u5730\u201d\u2014\u2014\u8f93\u51fa\u903b\u8f910\u3002<\/p>\n
\n\tIIC\u603b\u7ebf\u8bbe\u8ba1\u53ea\u4f7f\u7528\u4e86\u4e24\u6761\u7ebf\uff0c\u4f46\u76f8\u5f53\u4f18\u96c5\u5730\u5b9e\u73b0\u4efb\u610f\u6570\u76ee\u8bbe\u5907\u95f4\u65e0\u7f1d\u901a\u4fe1\uff0c\u582a\u79f0\u5b8c\u7f8e\u3002\u6211\u4eec\u8bbe\u60f3\u4e00\u4e0b\uff0c\u5982\u679c\u6709\u4e24\u652f\u8bbe\u5907\u540c\u65f6\u5411SCL\u7ebf\u548cSDA\u7ebf\u53d1\u9001\u4fe1\u606f\u4f1a\u51fa\u73b0\u4ec0\u4e48\u60c5\u51b5\u3002<\/p>\n
\n\t\u57fa\u4e8eIIC\u603b\u7ebf\u7684\u8bbe\u8ba1\uff0c\u7ebf\u8def\u4e0a\u4e0d\u53ef\u80fd\u51fa\u73b0\u7535\u5e73\u51b2\u7a81\u73b0\u8c61\u3002\u5982\u679c\u4e00\u652f\u8bbe\u5907\u53d1\u9001\u903b\u8f910\uff0c\u5176\u5b83\u53d1\u9001\u903b\u8f911\uff0c\u90a3\u4e48\u7ebf\u8def\u770b\u5230\u7684\u53ea\u6709\u903b\u8f910\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5982\u679c\u51fa\u73b0\u7535\u5e73\u51b2\u7a81\uff0c\u53d1\u9001\u903b\u8f910\u7684\u59cb\u7ec8\u662f\u201c\u8d62\u5bb6\u201d\u3002<\/p>\n
\n\t\u603b\u7ebf\u7684\u7269\u7406\u7ed3\u6784\u4ea6\u5141\u8bb8\u4e3b\u8bbe\u5907\u5728\u5f80\u603b\u7ebf\u5199\u6570\u636e\u7684\u540c\u65f6\u8bfb\u53d6\u6570\u636e\u3002\u8fd9\u6837\uff0c\u4efb\u4f55\u8bbe\u5907\u90fd\u53ef\u4ee5\u68c0\u6d4b\u51b2\u7a81\u7684\u53d1\u751f\u3002\u5f53\u4e24\u652f\u4e3b\u8bbe\u5907\u7ade\u4e89\u603b\u7ebf\u7684\u65f6\u5019\uff0c\u201c\u8d62\u5bb6\u201d\u5e76\u4e0d\u77e5\u9053\u7ade\u4e89\u7684\u53d1\u751f\uff0c\u53ea\u6709\u201c\u8f93\u5bb6\u201d\u53d1\u73b0\u4e86\u51b2\u7a81\u2014\u2014\u5f53\u5b83\u5199\u4e00\u4e2a\u903b\u8f911\uff0c\u5374\u8bfb\u52300\u65f6\u2014\u2014\u800c\u9000\u51fa\u7ade\u4e89\u3002<\/p>\n
\n\t10\u4f4d\u8bbe\u5907\u5730\u5740<\/p>\n
\n\t\u4efb\u4f55IIC\u8bbe\u5907\u90fd\u6709\u4e00\u4e2a7\u4f4d\u5730\u5740\uff0c\u7406\u8bba\u4e0a\uff0c\u73b0\u5b9e\u4e2d\u53ea\u80fd\u6709127\u79cd\u4e0d\u540c\u7684IIC\u8bbe\u5907\u3002\u5b9e\u9645\u4e0a\uff0c\u5df2\u6709IIC\u7684\u8bbe\u5907\u79cd\u7c7b\u8fdc\u8fdc\u591a\u4e8e\u8fd9\u4e2a\u9650\u5236\uff0c\u5728\u4e00\u6761\u603b\u7ebf\u4e0a\u51fa\u73b0\u76f8\u540c\u7684\u5730\u5740\u7684IIC\u8bbe\u5907\u7684\u6982\u7387\u76f8\u5f53\u9ad8\u3002\u4e3a\u4e86\u7a81\u7834\u8fd9\u4e2a\u9650\u5236\uff0c\u5f88\u591a\u8bbe\u5907\u4f7f\u7528\u4e86\u53cc\u91cd\u5730\u5740\u2014\u20147\u4f4d\u5730\u5740\u52a0\u5f15\u811a\u5730\u5740\uff08external configurati<\/u>on pins\uff09\u3002IIC \u6807\u51c6\u4e5f\u9884\u77e5\u4e86\u8fd9\u79cd\u9650\u5236\uff0c\u63d0\u51fa10\u4f4d\u7684\u5730\u5740\u65b9\u6848\u3002<\/p>\n
\n\t10\u4f4d\u7684\u5730\u5740\u65b9\u6848\u5bf9 IIC\u534f\u8bae\u7684\u5f71\u54cd\u6709\u4e24\u70b9\uff1a<\/p>\n
\n\t\u7b2c\u4e00\uff0c\u5730\u5740\u5e27\u4e3a\u4e24\u4e2a\u5b57\u8282\u957f\uff0c\u539f\u6765\u7684\u662f\u4e00\u4e2a\u5b57\u8282\uff1b<\/p>\n
\n\t\u7b2c\u4e8c\uff0c\u7b2c\u4e00\u4e2a\u5b57\u8282\u524d\u4e94\u4f4d\u6700\u9ad8\u6709\u6548\u4f4d\u7528\u4f5c10\u4f4d\u5730\u5740\u6807\u8bc6\uff0c\u7ea6\u5b9a\u662f\u201c11110\u201d\u3002<\/p>\n
\n\t<\/p>\n
\n\t\u9664\u4e8610\u4f4d\u5730\u5740\u6807\u8bc6\uff0c\u6807\u51c6\u8fd8\u9884\u7559\u4e86\u4e00\u4e9b\u5730\u5740\u7801\u7528\u4f5c\u5176\u5b83\u7528\u9014\uff0c\u5982\u4e0b\u8868\uff1a<\/p>\n
\n\t<\/p>\n
\n\t\u65f6\u949f\u62c9\u4f38<\/p>\n
\n\t\u5728 IIC \u901a\u4fe1\u4e2d\uff0c\u4e3b\u8bbe\u5907\u51b3\u5b9a\u4e86\u65f6\u949f\u901f\u5ea6\u3002\u56e0\u4e3a\u65f6\u949f\u8109\u51b2\u4fe1\u53f7\u662f\u7531\u4e3b\u8bbe\u5907\u663e\u5f0f\u53d1\u51fa\u7684\u3002\u4f46\u662f\uff0c\u5f53\u4ece\u8bbe\u5907\u6ca1\u529e\u6cd5\u8ddf\u4e0a\u4e3b\u8bbe\u5907\u7684\u901f\u5ea6\u65f6\uff0c\u4ece\u8bbe\u5907\u9700\u8981\u4e00\u79cd\u673a\u5236\u6765\u8bf7\u6c42\u4e3b\u8bbe\u5907\u6162\u4e00\u70b9\u3002\u8fd9\u79cd\u673a\u5236\u79f0\u4e3a\u65f6\u949f\u62c9\u4f38\uff0c\u800c\u57fa\u4e8eI\u00b2C\u7ed3\u6784\u7684\u7279\u6b8a\u6027\uff0c\u8fd9\u79cd\u673a\u5236\u5f97\u5230\u5b9e\u73b0\u3002\u5f53\u4ece\u8bbe\u5907\u9700\u8981\u964d\u4f4e\u4f20\u8f93\u7684\u901f\u5ea6\u7684\u65f6\u5019\uff0c\u5b83\u53ef\u4ee5\u6309\u4e0b\u65f6\u949f\u7ebf\uff0c\u903c\u8feb\u4e3b\u8bbe\u5907\u8fdb\u5165\u7b49\u5f85\u72b6\u6001\uff0c\u76f4\u5230\u4ece\u8bbe\u5907\u91ca\u653e\u65f6\u949f\u7ebf\uff0c\u901a\u4fe1\u624d\u7ee7\u7eed\u3002<\/p>\n
\n\t\u9ad8\u901f\u6a21\u5f0f<\/p>\n
\n\t\u539f\u7406\u4e0a\u8bb2\uff0c\u4f7f\u7528\u4e0a\u62c9\u7535\u963b\u6765\u8bbe\u7f6e\u903b\u8f911\u4f1a\u9650\u5236\u603b\u7ebf\u7684\u6700\u5927\u4f20\u8f93\u901f\u5ea6\u3002\u800c\u901f\u5ea6\u662f\u9650\u5236\u603b\u7ebf\u5e94\u7528\u7684\u56e0\u7d20\u4e4b\u4e00\u3002\u8fd9\u4e5f\u8bf4\u660e\u4e3a\u4ec0\u4e48\u8981\u5f15\u5165\u9ad8\u901f\u6a21\u5f0f\uff083.4 Mbps\uff09\u3002\u5728\u53d1\u8d77\u4e00\u6b21\u9ad8\u901f\u6a21\u5f0f\u4f20\u8f93\u524d\uff0c\u4e3b\u8bbe\u5907\u5fc5\u987b\u5148\u5728\u4f4e\u901f\u7684\u6a21\u5f0f\u4e0b\uff08\u4f8b\u5982\u5feb\u901f\u6a21\u5f0f\uff09\u53d1\u51fa\u7279\u5b9a\u7684\u201cHigh Speed Master\u201d\u4fe1\u53f7\u3002\u4e3a\u7f29\u77ed\u4fe1\u53f7\u7684\u5468\u671f\u548c\u63d0\u9ad8\u603b\u7ebf\u901f\u5ea6\uff0c\u9ad8\u901f\u6a21\u5f0f\u5fc5\u987b\u4f7f\u7528\u989d\u5916\u7684I\/O\u7f13\u51b2\u533a\u3002\u53e6\u5916\uff0c\u603b\u7ebf\u4ef2\u88c1\u5728\u9ad8\u901f\u6a21\u5f0f\u4e0b\u53ef\u5c4f\u853d\u6389\u3002\u66f4\u591a\u7684\u4fe1\u606f\u8bf7\u53c2\u4e0e\u603b\u7ebf\u6807\u51c6\u6587\u6863\u3002<\/p>\n
\n\tIIC vs SPI\uff1a \u54ea\u4f4d\u662f\u8d62\u5bb6\uff1f<\/p>\n
\n\t\u6211\u4eec\u6765\u5bf9\u6bd4\u4e00\u4e0bIIC \u548c SPI\u7684\u4e00\u4e9b\u5173\u952e\u70b9\uff1a<\/p>\n
\n\t\u7b2c\u4e00\uff0c\u603b\u7ebf\u62d3\u6251\u7ed3\u6784\/\u4fe1\u53f7\u8def\u7531\/\u786c\u4ef6\u8d44\u6e90\u8017\u8d39<\/p>\n
\n\tIIC \u53ea\u9700\u4e24\u6839\u4fe1\u53f7\u7ebf\uff0c\u800c\u6807\u51c6SPI\u81f3\u5c11\u56db\u6839\u4fe1\u53f7\uff0c\u5982\u679c\u6709\u591a\u4e2a\u4ece\u8bbe\u5907\uff0c\u4fe1\u53f7\u9700\u8981\u66f4\u591a\u3002\u4e00\u4e9bSPI\u53d8\u79cd\u867d\u7136\u53ea\u4f7f\u7528\u4e09\u6839\u7ebf\u2014\u2014SCLK\uff0c SS\u548c\u53cc\u5411\u7684MISO\/MOSI\uff0c\u4f46SS\u7ebf\u8fd8\u662f\u8981\u548c\u4ece\u8bbe\u5907\u4e00\u5bf9\u4e00\u6839\u3002\u53e6\u5916\uff0c\u5982\u679cSPI\u8981\u5b9e\u73b0\u591a\u4e3b\u8bbe\u5907\u7ed3\u6784\uff0c\u603b\u7ebf\u7cfb\u7edf\u9700\u989d\u5916\u7684\u903b\u8f91\u548c\u7ebf\u8def\u3002\u7528IIC \u6784\u5efa\u7cfb\u7edf\u603b\u7ebf\u552f\u4e00\u7684\u95ee\u9898\u662f\u6709\u9650\u76847\u4f4d\u5730\u5740\u7a7a\u95f4\uff0c\u4f46\u8fd9\u4e2a\u95ee\u9898\u65b0\u6807\u51c6\u5df2\u7ecf\u89e3\u51b3\u2014\u2014\u4f7f\u752810\u4f4d\u5730\u5740\u3002\u4ece\u7b2c\u4e00\u70b9\u4e0a\u770b\uff0cIIC\u662f\u660e\u663e\u7684\u5927\u8d62\u5bb6\u3002<\/p>\n
\n\t\u7b2c\u4e8c\uff0c\u6570\u636e\u541e\u5410\/\u4f20\u8f93\u901f\u5ea6<\/p>\n
\n\t\u5982\u679c\u5e94\u7528\u4e2d\u5fc5\u987b\u4f7f\u7528\u9ad8\u901f\u6570\u636e\u4f20\u8f93\uff0c\u90a3\u4e48SPI\u662f\u5fc5\u7136\u7684\u9009\u62e9\u3002\u56e0\u4e3aSPI\u662f\u5168\u53cc\u5de5\uff0cIIC \u7684\u4e0d\u662f\u3002SPI\u6ca1\u6709\u5b9a\u4e49\u901f\u5ea6\u9650\u5236\uff0c\u4e00\u822c\u7684\u5b9e\u73b0\u901a\u5e38\u80fd\u8fbe\u5230\u751a\u81f3\u8d85\u8fc710 Mbps\u3002IIC \u6700\u9ad8\u7684\u901f\u5ea6\u4e5f\u5c31\u5feb\u901f+\u6a21\u5f0f\uff081 Mbps\uff09\u548c\u9ad8\u901f\u6a21\u5f0f\uff083.4 Mbps\uff09\uff0c\u540e\u9762\u7684\u6a21\u5f0f\u8fd8\u9700\u8981\u989d\u5916\u7684I\/O\u7f13\u51b2\u533a\uff0c\u8fd8\u5e76\u4e0d\u662f\u603b\u662f\u5bb9\u6613\u5b9e\u73b0\u7684\u3002<\/p>\n
\n\t\u7b2c\u4e09\uff0c\u4f18\u96c5\u6027<\/p>\n
\n\tIIC \u5e38\u88ab\u79f0\u66f4\u4f18\u96c5\u4e8eSPI\u3002\u516c\u6b63\u7684\u8bf4\uff0c\u6211\u4eec\u66f4\u503e\u5411\u4e8e\u8ba4\u4e3a\u4e24\u8005\u540c\u7b49\u4f18\u96c5\u548c\u5065\u58ee\u3002IIC\u7684\u4f18\u96c5\u5728\u4e8e\u5b83\u7684\u7279\u8272\u2014\u2014\u7528\u5f88\u8f7b\u76c8\u7684\u67b6\u6784\u5b9e\u73b0\u4e86\u591a\u4e3b\u8bbe\u5907\u4ef2\u88c1\u548c\u8bbe\u5907\u8def\u7531\u3002\u4f46\u662f\u5bf9\u4f7f\u7528\u7684\u5de5\u7a0b\u5e08\u6765\u8bb2\uff0c\u7406\u89e3\u603b\u7ebf\u7ed3\u6784\u66f4\u8d39\u52b2\uff0c\u800c\u4e14\u603b\u7ebf\u7684\u6027\u80fd\u4e0d\u9ad8\u3002<\/p>\n
\n\tSPI\u7684\u4f18\u70b9\u5728\u4e8e\u5b83\u7684\u7ed3\u6784\u76f8\u5f53\u7684\u76f4\u89c2\u7b80\u5355\uff0c\u5bb9\u6613\u5b9e\u73b0\uff0c\u5e76\u4e14\u6709\u5f88\u597d\u6269\u5c55\u6027\u3002SPI\u7684\u7b80\u5355\u6027\u4e0d\u8db3\u79f0\u5176\u4f18\u96c5\uff0c\u56e0\u4e3a\u8981\u7528SPI\u642d\u5efa\u4e00\u4e2a\u6709\u7528\u7684\u901a\u4fe1\u5e73\u53f0\uff0c\u8fd8\u9700\u8981\u5728SPI\u4e4b\u4e0a\u6784\u5efa\u7279\u5b9a\u7684\u901a\u4fe1\u534f\u8bae\u8f6f\u4ef6\u3002\u4e5f\u5c31\u662f\u8bf4\u8981\u60f3\u83b7\u5f97SPI\u7279\u6709\u800cIIC\u6ca1\u6709\u7684\u7279\u6027\u2014\u2014\u9ad8\u901f\u6027\u80fd\uff0c\u5de5\u7a0b\u5e08\u4eec\u9700\u8981\u4ed8\u51fa\u66f4\u591a\u7684\u52b3\u52a8\u3002\u53e6\u5916\uff0c\u8fd9\u79cd\u81ea\u5b9a\u7684\u5de5\u4f5c\u662f\u5b8c\u5168\u81ea\u7531\u7684\uff0c\u8fd9\u4e5f\u8bf4\u660e\u4e3a\u4ec0\u4e48SPI\u6ca1\u6709\u5b98\u65b9\u6807\u51c6\u3002IIC\u548cSPI\u90fd\u5bf9\u4f4e\u901f\u8bbe\u5907\u901a\u4fe1\u63d0\u4f9b\u4e86\u5f88\u597d\u7684\u652f\u6301\uff0c\u4e0d\u8fc7\uff0cSPI\u9002\u5408\u6570\u636e\u6d41\u5e94\u7528\uff0c\u800cIIC\u66f4\u9002\u5408\u201c\u5b57\u8282\u8bbe\u5907\u201d\u7684\u591a\u4e3b\u8bbe\u5907\u5e94\u7528\u3002<\/p>\n
\n\t\u5c0f\u7ed3<\/p>\n
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