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AD5161BRM5 Datasheet(PDF) 14 Page - Analog Devices |
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AD5161BRM5 Datasheet(HTML) 14 Page - Analog Devices |
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14 / 20 page 
AD5161 Data Sheet Rev. B | Page 14 of 20 I2C INTERFACE Table 7. Write Mode S 0 1 0 1 1 0 AD0 W A X RS SD X X X X X A D7 D6 D5 D4 D3 D2 D1 D0 A P Slave Address Byte Instruction Byte Data Byte Table 8. Read Mode S 0 1 0 1 1 0 AD0 R A D7 D6 D5 D4 D3 D2 D1 D0 A P Slave Address Byte Data Byte S = Start Condition P = Stop Condition A = Acknowledge X = Don’t Care W = Write R = Read RS = Reset wiper to Midscale 80H SD = Shutdown connects wiper to B terminal and open circuits A terminal. It does not change contents of wiper register. D7, D6, D5, D4, D3, D2, D1, D0 = Data Bits. t1 t3 t4 t2 t7 t8 t9 P S P S t10 t5 t9 t8 SCL SDA t2 t6 Figure 39. I2C Interface Detailed Timing Diagram SCL FRAME 1 FRAME 2 START BY MASTER ACK BY AD5161 SLAVE ADDRESS BYTE STOP BY MASTER INSTRUCTION BYTE SDA 0 1 0 1 1 0 AD0 R/W X RS X X X X X 1 9 1 9 D7 D6 D5 D4 D3 D2 D1 D0 ACK BY AD5161 FRAME 3 DATA BYTE 1 9 ACK BY AD5161 SD Figure 40. Writing to the RDAC Register NO ACK BY MASTER SCL SDA 0 1 0 1 1 0 AD0 R/W D7 D6 D5 D4 D3 D2 D1 D0 1 9 1 9 FRAME 1 FRAME 2 START BY MASTER ACK BY AD5161 SLAVE ADDRESS BYTE RDAC REGISTER STOP BY MASTER Figure 41. Reading Data from a Previously Selected RDAC Register in Write Mode |
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