i2c 总线规范学习笔记[原创]（I2C bus standard learning notes [original]）.docVIP

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i2c 总线规范学习笔记[原创]（I2C bus standard learning notes [original]）.doc

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i2c 总线规范学习笔记[原创]（I2C bus standard learning notes [original]）

i2c 总线规范学习笔记[原创]（I2C bus standard learning notes [original]） I2C bus specification study notes [original] 1, the definition of I2C bus terminology The term description The transmitter sends data to the bus device The receiver device receives the data from the bus The sending host initialization clock signal and sends the termination device From the host machine is device addressing At the same time, there are more than one multi host host attempts to control bus but not failure message Arbitration is a multi host while attempting to control the bus but allow only one control bus and the message without destroying process The process of synchronization of two or more devices of synchronous clock signals The process of data transmission on the I2C bus, 2 I2C bus is a multi host, which can connect more than one bus to the bus control device. Because the host is usually the micro controller, let us consider the following data in two connected to the I2C bus transmission micro controller. This highlights the host I2C bus - between the transmitter and the receiver -- from the machine. It should be noted that these relationships are not persistent, only was decided by the direction of data transmission. The process of data transmission: 1) that the micro controller A to send the information to the micro controller B Micro controller A microcontroller B machine from the host address Micro controller A transmitter sends data to the host machine from the micro controller B receiver Micro controller A terminated transmission 2) if the micro controller A to receive information from the micro controller B Micro controller A microcontroller B machine from the host address Micro controller A microcontroller B receiver from the host machine to receive data from the transmitter Micro controller A terminated transmission, even in this case the host microcontroller A also generates timing and termination of transmission 3, I2C bus arbitration Connect more than one micro controller to