X9418_06 Datasheet, PDF (6/20 Pages) Intersil Corporation – Dual Digitally Controlled Potentiometers

X9418
Table 1. Instruction Set
Instruction Set
Instruction
Read Wiper Counter
Register
Write Wiper Counter
Register
Read Data Register
Write Data Register
XFR Data Register to
Wiper Counter Register
I₃ I₂ I₁ I₀ R₁ R₀ P₁ P₀
Operation
1 0 0 1 0 0 0 1/0 Read the contents of the Wiper Counter Register
pointed to by P₀
1 0 1 0 0 0 0 1/0 Write new value to the Wiper Counter Register
pointed to by P₀
1 0 1 1 1/0 1/0 0 1/0 Read the contents of the Data Register pointed to by
P₀ and R₁ - R₀
1 1 0 0 1/0 1/0 0 1/0 Write new value to the Data Register pointed to by
P₀ and R₁ - R₀
1 1 0 1 1/0 1/0 0 1/0 Transfer the contents of the Data Register pointed to
by P₀ and R₁ - R₀ to its associated Wiper Counter
Register
XFR Wiper Counter
1 1 1 0 1/0 1/0 0 1/0 Transfer the contents of the Wiper Counter Register
Register to Data Register
pointed to by P₀ to the Data Register pointed to by
R₁ - R₀
Global XFR Data
0 0 0 1 1/0 1/0 0 0 Transfer the contents of the Data Registers pointed
Registers to Wiper
Counter Registers
to by R₁ - R₀ of both pots to their respective Wiper
Counter Registers
Global XFR Wiper
Counter Registers to
Data Register
Increment/Decrement
Wiper Counter 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 R₁ - R₀ of both pots
0 0 1 0 0 0 0 1/0 Enable Increment/decrement of the Wiper Counter
Register pointed to by P₀
Note: (7) 1/0 = data is one or zero
Figure 4. Three-Byte Instruction Sequence
SCL
SDA
S 0 1 0 1 A3 A2 A1 A0 A I3 I2 I1 I0 R1 R0 0 P0 A 0 0 D5 D4 D3 D2 D1 D0 A S
T
C
C
CT
A
K
K
KO
R
P
T
Figure 5. Increment/Decrement Instruction Sequence
SCL
SDA
XX
S 0 1 0 1 A3 A2 A1 A0 A I3 I2 I1 I0 R1 R0 0 P0 A I I
T
C
CN N
A
K
KCC
R
12
T
ID
N
C
E
C
n1
DS
E
C
T
O
nP
6
FN8194.3
October 12, 2006