Datasheet > AD5245BRJ5-R2

AD5245BRJ5-R2

更新时间： 2024-02-16 13:49:34

品牌	Logo	应用领域
亚德诺 - ADI		数字电位计
页数	文件大小	规格书
16页	853K
描述
256-Position I2C Compatible Digital Potentiometer

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数据手册

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AD5245BRJ5-R2 数据手册

AD5245

I²C INTERFACE

Table 5. Write Mode

AD0 W

RS SD

Dꢀ D6 D5 D4 D3 D2 D1 D0

Data Byte

Slave Address Byte

Instruction Byte

Table 6. Read Mode

AD0

Dꢀ D6 D5 D4 D3 D2 D1 D0

Data Byte

Slave Address Byte

S = Start Condition

P = Stop Condition

A = Acknowledge

X = Don’t Care

R = Read

RS = Reset wiper to Midscale 80_H

SD = Shutdown connects wiper to B terminal and open

circuits A terminal. It does not change contents of wiper

= Write

D7, D6, D5, D4, D3, D2, D1, D0 = Data Bits

t₂

t₈

t₉

SCL

SDA

t₆

t₇

t₅

t₁₀

t₂

t₃

t₄

t₉

t₈

t₁

Figure 36. I²C Interface Detailed Timing Diagram

SCL

AD0 R/W

SDA

ACK BY

AD5245

ACK BY

AD5245

ACK BY

AD5245

FRAME 1

FRAME 2

INSTRUCTION BYTE

FRAME 3

STOP BY

START BY

MASTER

SLAVE ADDRESS BYTE

DATA BYTE

MASTER

Figure 37. Writing to the RDAC Register

SCL

AD0 R/W

SDA

ACK BY

AD5245

NO ACK

BY MASTER

FRAME 1

FRAME 2

RDAC REGISTER

START BY

MASTER

STOP BY

MASTER

SLAVE ADDRESS BYTE

Figure 38. Reading Data from a Previously Selected RDAC Register in Write Mode

Rev. 0 | Page 11 of 16

1...8 9 101112 13 14...16

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