X9259 Xicor, X9259 Datasheet - Page 8

• Manufacturer Part Number: X9259
• Description: Quad Digitally-Controlled (XDCP) Potentiometers
• Manufacturer: Xicor

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