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AD5259BRMZ10 Datasheet(PDF) 5 Page - Analog Devices

Part No. AD5259BRMZ10
Description  Nonvolatile, I2C-Compatible 256-Position, Digital Potentiometer
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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AD5259
Preliminary Technical Data
Rev. PrJ 7/22/04 | Page 5 of 14
I2C INTERFACE
Table 3. Generic Interface Format
S
Device Address*
(7-bit)
R/W SA C2 C1 C0 A4 A3 A2 A1 A0 SA D7 D6 D5 D4 D3 D2 D1 D0 SA
P
Slave Address Byte
Instruction Byte
Data Byte
Table 4. Device Address Lookup*
(Note that AD1 and AD0 are tri-state address pins)
Device
Address
0011000
0
0
0011001
NC
0
0011010
1
0
0101001
0
NC
0101010
NC
NC
0101011
1
NC
1001100
0
1
1001101
NC
1
1001110
1
1
AD1
AD0
S = Start Condition
P = Stop Condition
SA = Slave Acknowledge
MA = Master Acknowledge
NA = No Acknowledge
X = Donā€™t Care
W = Write
R = Read
Table 5. RDAC-to-EEMEM Interface Command Descriptions
C2
C1
C0
Command Description
0
0
0
Operation between I
2C and RDAC
0
0
1
Operation between I
2C and EEPROM
0
1
0
Operation between I
2C and WP register
1
0
0
NOP
1
0
1
Restore EEPROM to RDAC
1
1
0
Store RDAC to EEPROM




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