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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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VL6524 датащи(PDF) 38 Page - STMicroelectronics |
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VL6524 датащи(HTML) 38 Page - STMicroelectronics |
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38 / 70 page  Host communication - I²C control interface VL6524/VS6524 38/70 Current location, single data read For the master reading from the slave the R/W bit is set to one. The register index of the data returned is that accessed by the previous read or write message. The first data byte returned by a read message is the contents of the internal index value and NOT the index value. This was the case in older V2W implementations. Note that the read message is terminated with a negative acknowledge (A) from the master: it is not guaranteed that the master will be able to issue a stop condition at any other time during a read message. This is because if the data sent by the slave is all zeros, the SDA line cannot rise, which is part of the stop condition. Figure 26. Current location, single read DATA DATA[7:0] DATA[7:0] S DEV ADDR R/W A ‘1’ (Read) P A 16-bit index, 8-bit data current location, single data read From Master to Slave From Slave to Master S = START Condition Sr = repeated START P = STOP Condition A = Acknowledge A = Negative Acknowledge Previous Index Value, K |
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