X9259 Datasheet, PDF (8/21 Pages) Xicor Inc. – Quad Digitally-Controlled (XDCP) Potentiometers

TABLE 3. IDENTIFICATION BYTE FORMAT
Device Type
Identifier
ID3
ID2
ID1
ID0
0
1
0
1
(MSB)
TABLE 4. INSTRUCTION BYTE FORMAT
Instruction
Opcode
I3
I2
I1
I0
(MSB)
X9259
Slave Address
A3
A2
A1
A0
Logic value of pins A3, A2, A1, and A0
(LSB)
Register
Selection
RB
RA
DCP Selection
(WCR Selection)
P1
P0
(LSB)
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 to Wiper 0 0 0 1 1/0 1/0 0
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
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 DCPs
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
8
FN8169.2
September 16, 2005