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interface devices can be connected to the same I C bus, through the device address to distinguish

between them. I C bus addressing procedure is usually starting at the first byte determines the

conditions to choose which one from the host machine, the seven addressable address (the other is a

10-bit addressing addresses differ the sensor uses seven addressable address). Bit of the first byte of

the definition shown in Figure 10, the first byte of the first seven constitute the slave address, the

least significant bit (LSB) is the first 8. It determines the direction of the packet, the lowest bit of the

first byte (LSB) is "0": Indicates that the host will write information to the selected slave; "1"

indicates that the host will read information from the machine to.

Figure 10: The first byte after the START condition

After sending an address, each device in the system after the initial conditions, the head seven

comparison with its own address, if different, the device will think it is the host address, as a slave on

the receiver or from a machine the transmitter consists of R / W bits. The host is the master device, it

does not require the device address, other devices are all slaves, to have the device address. Must

ensure that the same I C bus address all slaves are uniquely determined, can’t be duplicated,

otherwise I C-bus will not work properly.

◎The basic data format diagram

Figure 11, Figure 12 shows the basic format of each of I C transmission and reception of

data. It should be noted that the situation in Figure 11 and Figure 12 is different, in Figure 11, the

host at the time of sending the last byte of data to the slave, the slave may also be a non-answer

answer, but in any case the host can generate stop condition. If the host sends data to the machine

(even including slave address) from the detection of non-response from the machine, you should

promptly stop transmission.

Figure 11: C bus master sends the data to the machine from the basic format

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