AD5251 Analog Devices, AD5251 Datasheet - Page 10

• Manufacturer Part Number: AD5251
• Description: (AD5251 / AD5252) Dual 64-and 256-Position I2C Nonvolatile Memory Digital Potentiometers
• Manufacturer: Analog Devices

AD5251/AD5252
I
2
C INTERFACE GENERAL DESCRIPTION
S
SLAVE ADDRESS
S = START CONDITION
P = STOP CONDITION
A = ACKNOWLEDGE (SDA LOW)
A = NOT ACKNOWLEDGE (SDA HIGH)
R/W = READ ENABLE AT HIGH AND WRITE ENABLE AT LOW
S
S
(7-BIT)
FROM MASTER TO SLAVE
FROM SLAVE TO MASTER
SLAVE ADDRESS
SLAVE ADDRESS
READ OR WRITE
(7-BIT)
(7-BIT)
R/W
A
0 WRITE
1 READ
ACKNOWLEDGE)
R/W
R/W
DATA
(N BYTES +
Figure 5. I
Figure 4. I
A
A
Figure 6. I
2
C—Master Reading Data from Slave
2
C—Master Writing Data to Slave
Rev. 0 | Page 10 of 28
2
INSTRUCTIONS
C—Combined Write/Read
A/A
REPEATED START
(8-BIT)
(8-BIT)
DATA
S
SLAVE ADDRESS
(N BYTES + ACKNOWLEDGE)
(N BYTES + ACKNOWLEDGE)
DATA TRANSFERRED
DATA TRANSFERRED
A
A
DIRECTION OF TRANSFER MAY
CHANGE AT THIS POINT
OR WRITE
READ
R/W
(8-BIT)
(8-BIT)
DATA
DATA
A
ACKNOWLEDGE)
DATA
(N BYTES +
A/A
A
P
P
A/A
P