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AK7735EQ 데이터시트(PDF) 86 Page - Asahi Kasei Microsystems |
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AK7735EQ 데이터시트(HTML) 86 Page - Asahi Kasei Microsystems |
86 / 142 page [AK7735] 016014707-E-00 2016/12 - 86 - 1-3. Repeated Start Condition When a Start condition is received again instead of a Stop condition, the bus changes to a Repeated Start condition. A Repeated Start condition is functionally the same as a Start condition. Figure 63. Repeated Start Condition (I 2C) 1-4. Acknowledge The IC device that sends data releases the SDA line (“H”) after sending one byte of data. The IC device that receives data then sets the SDA line to “L” at the next clock. This operation is called “acknowledgement”, and it enables verification that the data transfer has been properly executed. The AK7735 generates an acknowledgement upon receipt of a Start condition and a Slave address. For a write instruction, an acknowledgement is generated whenever receipt of each byte is completed. For a read instruction, succeeded by generation of an acknowledgement, the AK7735 releases the SDA line after outputting data at the designated address, and it monitors the SDA line condition. When the Master side generates an acknowledgement without sending a Stop condition, the AK7735 outputs data at the next address location. When no acknowledgement is generated, the AK7735 ends data output (not acknowledged). Figure 64. Generation of Acknowledgement (I 2C) SCL SDA Repeated Start CONDITION START CONDITION SCL FROM MASTER acknowledge DATA OUTPUT BY TRANSMITTER DATA OUTPUT BY RECEIVER 1 9 8 START CONDITION Clock pulse for acknowledge not acknowledge |
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