Addressable Digital Potentiometer

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implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

© 2002 Maxim Integrated Products

Printed USA

is a registered trademark of Maxim Integrated Products.

Figure 5. 2-Wire Write Protocols

Figure 6. Timing Diagram

MSB

OPTIONAL

DATA

BYTE

LSB

POT-1

MSB

CONTROL

BYTE

LSB

MSB

COMMAND

BYTE

LSB

MSB

DATA

BYTE

LSB

POT-1

R/W = 0

MSB

REGISTER-0

WRITE POT-1

WRITE REGISTER-0 AND POT-1 (SAME VALUE)

CONTROL

BYTE

LSB

MSB

COMMAND

BYTE

LSB

MSB

DATA

BYTE

LSB

REG-0

R/W = 0

01

0

1

A2

A1

A0

0

01

0

1

A2

A1

A0

0

01

0

1

A2

A1

A0

0

10

1

0

1

0

0

1

10

1

0

1

0

1

0

MSB

CONTROL

BYTE

LSB

MSB

COMMAND

BYTE

LSB

MSB

DATA

BYTE

LSB

REG-0/POT-1 VALUE

R/W = 0

10

1

0

1

1

1

1

SDA

SCL

REPEATED

START

STOP

START