X9251 Datasheet, PDF (9/25 Pages) Xicor Inc. – Quad Digitally-Controlled (XDCP) Potentiometer

X9251
Table 5. 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 Counter Register
1 1 0 1 1/0 1/0 1/0 1/0 Transfer the contents of the Data Register
pointed to by P1-P0 and RB-RA to its
associated Wiper Counter Register
XFR Wiper Counter
Register to Data Register
1 1 1 0 1/0 1/0 1/0 1/0 Transfer the contents of the Wiper Counter
Register pointed to by P1-P0 to the Data
Register pointed to by RB-RA
Global XFR Data Registers 0 0 0 1 1/0 1/0 0
to Wiper Counter Registers
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 1 0 0 0 1/0 1/0 0
Registers to Data Register
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 Counter Register
0 0 1 0 0 0 1/0 1/0 Enable Increment/decrement of the Control
Latch pointed to by P1-P0
Note: 1/0 = data is one or zero
REV 1.3.3 2/10/04
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Characteristics subject to change without notice. 9 of 25