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AD5231BRU10 Datasheet(PDF) 9 Page - Analog Devices

Part # AD5231BRU10
Description  Nonvolatile Memory Digital Potentiometers
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD5231BRU10 Datasheet(HTML) 9 Page - Analog Devices

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PRELIMINARY TECHNICAL DATA
Nonvolatile Memory Digital Potentiometers
AD5231/AD5232/AD5233
REV PrF
9
22 MAR '01
Information contained in this Preliminary data sheet describes a product in the early definition stage. There is no guarantee that the
information contained here will become a final product in its present form. For latest information contact Walt Heinzer/Analog Devices, Santa
Clara, CA. TEL(408)382-3107; FAX (408)382-2708; walt.heinzer@analog.com
Table 3. AD5231 Instruction/Operation Truth Table
Inst
No.
Instruction Byte 1
B15 •••••••••••••••• B8
Data Byte 1
B15 •••• B8
Data Byte 0
B7 ••• B0
Operation
C3 C2 C1 C0 A3 A2 A1 A0
X ••• D9 D8
D7 ••• D0
0
0
0
0
0
X
X
X
X
X ••• X
X
X
••• X
No Operation (NOP): Do nothing
1
0
0
0
1
<< ADDR >>
X ••• X
X
X
••• X
Write contents of EEMEM(ADDR) to RDAC(ADDR)
Register
2
0
0
1
0
<< ADDR >>
X ••• X
X
X
••• X
SAVE WIPER SETTING: Write contents of
RDAC(ADDR) to EEMEM(ADDR)
3
0
0
1
1
<< ADDR >>
X ••• D9 D8
D7 ••• D0
Write contents of Serial Register Data Byte 0 & 1 to
EEMEM(ADDR)
4
0
1
0
0
<< ADDR >>
X ••• X
X
X
••• X
Decrement 6dB: Right Shift contents of
RDAC(ADDR), stops at all "Zeros".
5
0
1
0
1
X
X
X
X
X ••• X
X
X
••• X
Decrement All 6dB: Right Shift contents of all
RDAC Registers, stops at all "Zeros".
6
0
1
1
0
<< ADDR >>
X ••• X
X
X
••• X
Decrement contents of RDAC(ADDR) by "One",
stops at all "Zeros".
7
0
1
1
1
X
X
X
X
X ••• X
X
X
••• X
Decrement contents of RDAC Register by "One",
stops at all "Zeros".
8
1
0
0
0
0
0
0
0
X ••• X
X
X
••• X
RESET: Load all RDACs with their corresponding
EEMEM previously-saved values
9
1
0
0
1
<< ADDR >>
X ••• X
X
X
••• X
Write contents of EEMEM(ADDR) to Serial Register
Data Byte 0 & 1
10
1
0
1
0
<< ADDR >>
X ••• X
X
X
••• X
Write contents of RDAC(ADDR) to Serial Register
Data Byte 0 & 1
11
1
0
1
1
<< ADDR >>
X ••• D9 D8
D7 ••• D0
Write contents of Serial Register Data Byte 0 &1 to
RDAC(ADDR)
12
1
1
0
0
<< ADDR >>
X ••• X
X
X
••• X
Increment 6dB: Left Shift contents of
RDAC(ADDR), stops at all "Ones".
13
1
1
0
1
X
X
X
X
X ••• X
X
X
••• X
Increment All 6dB: Left Shift contents of all RDAC
Registers, stops at all "Ones".
14
1
1
1
0
<< ADDR >>
X ••• X
X
X
••• X
Increment contents of RDAC(ADDR) by "One",
stops at all "Ones".
15
1
1
1
1
X
X
X
X
X ••• X
X
X
••• X
Increment contents of RDAC Register by "One",
stops at all "Ones".
NOTES:
1.
The SDO output shifts-out the last 16-bits of data clocked into the serial register for daisy chain operation. Exception:
following Instruction #9 or #10 the selected internal register data will be present in data byte 0 & 1. Instructions
following #9 & #10 must be a full 24-bit data word to completely clock out the contents of the serial register.
2.
The RDAC register is a volatile scratch pad register that is refreshed at power ON from the corresponding non-volatile
EEMEM register.
3.
The increment, decrement and shift commands ignore the contents of the shift register Data Byte 0.
4.
Execution of the Operation column noted in the table takes place when the
CS strobe returns to logic high.


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