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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TDA7801PDTR датащи(PDF) 34 Page - STMicroelectronics |
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TDA7801PDTR датащи(HTML) 34 Page - STMicroelectronics |
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34 / 48 page  I2C bus interface TDA7801 34/48 DocID022674 Rev 4 8 I2C bus interface Data transmission from microprocessor to the TDA7801 and viceversa takes place through the 2 wires I2C bus interface, consisting of the two lines SDA and SCL (pull-up resistors to positive supply voltage must be connected). When I2C bus is active any operating mode of the IC may be modified and the diagnostic may be controlled and results read back. The protocol used for the bus is depicted in Figure 38 and comprises: a start condition (S) a chip address byte (the LSB bit determines read/write transmission) a subaddress byte a sequence of data (N-bytes + acknowledge) a stop condition (P) Figure 38. I2C bus protocol description Description: S = Start R/W = '0' => Receive-Mode (Chip could be programmed by µP) I = Auto increment; when 1, the address is automatically increased for each byte transferred X: not used A = Acknowledge P = Stop MAX CLOCK SPEED 400kbit/sec * = available in PowerSO36 |
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