AD5253 datasheet(14/28 Pages) AD

Part #	AD5253

Description	Quad 64-/256-Position I2C Nonvolatile Memory Digital Potentiometers

PDF	28 Pages

Scroll/Zoom	100%

Manufacturer	AD [Analog Devices]

Direct Link	http://www.analog.com

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14 / 28 page

AD5253/AD5254

Rev. 0 | Page 14 of 28

I2C INTERFACE

SCL

SDA

t10

Figure 23. I2C Interface Timing Diagram

I2C INTERFACE GENERAL DESCRIPTION

From Master to Slave

From Slave to Master

S = Start Condition.

P = Stop Condition.

A = Acknowledge (SDA Low).

A = Not Acknowledge (SDA High).

R/W = Read Enable at High; Write Enable at Low.

R/W

A/A

SLAVE ADDRESS

(7-BIT)

0 WRITE

INSTRUCTIONS

(8-BIT)

DATA TRANSFERRED

(N BYTES + ACKNOWLEDGE)

DATA

(8-BIT)

Figure 24. I2C—Master Writing Data to Slave

R/W

SLAVE ADDRESS

(7-BIT)

1 READ

DATA TRANSFERRED

(N BYTES + ACKNOWLEDGE)

DATA

(8-BIT)

DATA

(8-BIT)

Figure 25. I2C—Master Reading Data From Slave

R/W

SLAVE ADDRESS

(7-BIT)

READ OR WRITE

(N BYTES +

ACKNOWLEDGE)

SLAVE ADDRESS

DATA

REPEATED START

READ

OR WRITE

DIRECTION OF TRANSFER MAY

CHANGE AT THIS POINT

A/A

(N BYTES +

ACKNOWLEDGE)

DATA

A/A

Figure 26. I2C—Combined Write/Read

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