AD5170BRM2.5-RL7(RevA) View Datasheet(PDF) - Analog Devices

Part Name

Description

Manufacturer

AD5170BRM2.5-RL7
(Rev.:RevA)

256-Position Two-Time Programmable I2C Digital Potentiometer

Analog Devices 

AD5170

SCL

t2

SDA

t1

P

S

t8

t6

t9

t3

t4

t7

t8

t9

t2

t5

S

Figure 44. I2C Interface Detailed Timing Diagram

t10

P

SCL

SDA

START BY

MASTER

1

91

91

9

0 1 0 1 1 AD1 AD0 R/W

A0 SD T 0 OW X X

FRAME 1

SLAVE ADDRESS BYTE

ACK BY

AD5170

FRAME 2

INSTRUCTION BYTE

X

D7 D6 D5 D4 D3 D2 D1 D0

ACK BY

AD5170

FRAME 3

DATA BYTE

ACK BY

AD5170

STOP BY

MASTER

Figure 45. Writing to the RDAC Register

SCL

SDA

START BY

MASTER

1

91

91

9

0 1 0 1 1 AD1 AD0 R/W

D7 D6 D5 D4 D3 D2 D1 D0

E1 E0 X X X X X X

ACK BY

AD5170

ACK BY

MASTER

NO ACK

BY MASTER

FRAME 1

SLAVE ADDRESS BYTE

FRAME 2

INSTRUCTION BYTE

FRAME 3

DATA BYTE

STOP BY

MASTER

Figure 46. Reading Data from the RDAC Register

Rev. A | Page 19 of 24

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