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AD7991 датащи(PDF) 21 Page - Analog Devices |
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AD7991 датащи(HTML) 21 Page - Analog Devices |
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21 / 25 page ![]() Preliminary Technical Data AD7991/AD7995/AD7999 Rev. PrB | Page 21 of 25 WRITING TO THE AD7991/AD7995/AD7999 This part can be used in read-only mode if the user wishes to use all 4 channels sequentially as the default on the configure register allows. However, the user must write to the configuration register of the part AD7991/AD7995/AD7999 if they want to change from the default settings on the configuration register. WRITING A SINGLE BYTE OF DATA TO THE CONFIGURATION REGISTER The configuration register is an 8-bit register, so only one byte of data can be written. Writing a single byte of data to this register consists of the serial bus write address, followed by the data byte written to the configuration register. See Figure 16 below. SDA ACK. BY AD7992 START BY MASTER FRAME 1 SERIAL BUS ADDRESS BYTE ACK. BY ADC 19 1 9 D7 D6 D5 D2 D1 D0 R/ 9 A0 0 0 SCL 1 D4 D3 1 0 0 STOP CONTROL REGISTER BYTE Figure 16.Writing to the AD7991/AD7995/AD7999 Configuration Register |
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