X9259 Datasheet, PDF (8/25 Pages) Xicor Inc. – Quad Digitally-Controlled (XDCP) Potentiometers

X9259
Table 1. Identification Byte Format
Device Type
Identifier
Slave Address
ID3
ID2
ID1
ID0
A3
A2
A1
A0
0
1
0
1
(MSB)
(LSB)
Table 2. Instruction Byte Format
Instruction
Opcode
I3
I2
I1
I0
(MSB)
Register
Selection
RB
RA
Pot Selection
(WCR Selection)
P1
P0
(LSB)
Table 3. Instruction Set
Instruction Set
Instruction
I3 I2 I1 I0 RB RA P1 P0
Operation
Read Wiper Counter
Register
1 0 0 1 0 0 1/0 1/0 Read the contents of the Wiper Counter
Register pointed to by P1-P0
Write Wiper Counter Register 1 0 1 0 0 0 1/0 1/0 Write new value to the Wiper Counter
Register pointed to by P1-P0
Read Data Register
1 0 1 1 1/0 1/0 1/0 1/0 Read the contents of the Data Register
pointed to by P1-P0 and RB-RA
Write Data Register
1 1 0 0 1/0 1/0 1/0 1/0 Write new value to the Data Register
pointed to by P1-P0 and RB-RA
XFR Data Register to Wiper 1 1 0 1 1/0 1/0 1/0 1/0 Transfer the contents of the Data Register
Counter Register
pointed to by P1-P0 and RB-RA to its
associated Wiper Counter Register
XFR Wiper Counter Register 1 1 1 0 1/0 1/0 1/0 1/0 Transfer the contents of the Wiper Counter
to Data Register
Register pointed to by P1-P0 to the Data
Register pointed to by RB-RA
Global XFR Data Registers
to Wiper Counter Registers
0 0 0 1 1/0 1/0 0
0 Transfer the contents of the Data Registers
pointed to by RB-RA of all four pots to their
respective Wiper Counter Registers
Global XFR Wiper Counter
Registers to Data Register
1 0 0 0 1/0 1/0 0
0 Transfer the contents of both Wiper Counter
Registers to their respective data Registers
pointed to by RB-RA of all four pots
Increment/Decrement Wiper 0 0 1 0 0 0 1/0 1/0 Enable Increment/decrement of the Control
Counter Register
Latch pointed to by P1-P0
Note: 1/0 = data is one or zero
REV 1.2.3 4/30/02
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Characteristics subject to change without notice. 8 of 25