X9269 Datasheet, PDF (8/25 Pages) Xicor Inc. – Dual Digitally-Controlled Potentiometers

X9269
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)
0
P0
(LSB)
Table 3. Instruction Set
Instruction Set
Instruction
I3 I2 I1 I0 RB RA 0 P0
Operation
Read Wiper Counter
Register
1 0 0 10 0
0 1/0 Read the contents of the Wiper Counter
Register pointed to by P0
Write Wiper Counter Register 1 0 1 0 0 0
0 1/0 Write new value to the Wiper Counter
Register pointed to by P0
Read Data Register
1 0 1 1 1/0 1/0 0 1/0 Read the contents of the Data Register
pointed to by P0 and RB-RA
Write Data Register
1 1 0 0 1/0 1/0 0 1/0 Write new value to the Data Register
pointed to by P0 and RB-RA
XFR Data Register to Wiper 1 1 0 1 1/0 1/0 0 1/0 Transfer the contents of the Data Register
Counter Register
pointed to by P0 and RB-RA to its
associated Wiper Counter Register
XFR Wiper Counter Register 1 1 1 0 1/0 1/0 0 1/0 Transfer the contents of the Wiper Counter
to Data Register
Register pointed to by P0 to the Data Reg-
ister 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
Counter Register
0 1/0 Enable Increment/decrement of the Control
Latch pointed to by P0
Note: 1/0 = data is one or zero
REV 1.1.11 2/17/03
www.xicor.com
Characteristics subject to change without notice. 8 of 25