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VS6624P0LP 데이터시트(PDF) 39 Page - STMicroelectronics |
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VS6624P0LP 데이터시트(HTML) 39 Page - STMicroelectronics |
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39 / 100 page ![]() VS6624 Host communication - I²C control interface Rev 1 39/100 10.5 Acknowledge After every byte transferred the receiver must output an acknowledge bit. To acknowledge the data byte receiver pulls SDA during the 9th SCL clock cycle generated by the master. If SDA is not pulled low then the transmitter stops the output of data and releases control of the bus back to the master so that it can either generate a STOP or a repeated START condition. Figure 24. Data acknowledge 10.6 Index space Communication using the serial bus centres around a number of registers internal to the either the sensor or the co-processor. These registers store sensor status, set-up, exposure and system information. Most of the registers are read/write allowing the receiving equipment to change their contents. Others (such as the chip id) are read only. The internal register locations are organized in a 64k by 8-bit wide space. This space includes “real” registers, SRAM, ROM and/or micro controller values. S 12 89 START Condition Negative Acknowledge (A) Acknowledge (A) Clock Pulse for Acknowledge SDA data transmitter output by SDA data receiver output by SCL clock from master |
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