X9241A Xicor, X9241A Datasheet - Page 5

• Manufacturer Part Number: X9241A
• Description: Quad Digitally Controlled Potentiometer (XDCP)
• Manufacturer: Xicor

X9241A
The Increment/Decrement command is different from
the other commands. Once the command is issued and
the X9241A has responded with an acknowledge, the
master can clock the selected wiper up and/or down in
one segment steps; thereby, providing a fine tuning
capability to the host. For each SCL clock pulse (t
while SDA is HIGH, the selected wiper will move one
Figure 3. Two-Byte Instruction Sequence
Figure 4. Three-Byte Instruction Sequence
Figure 5. Increment/Decrement Instruction Sequence
REV 1.1.13 12/09/02
SDA
SCL
SDA
SCL
S
T
A
R
T
S
A
R
T
T
SDA
SCL
0
0
1
1
0
S
A
R
T
T
0
1
0
1
A3 A2 A1 A0 A
A3 A2 A1 A0
1
0
1
A3 A2 A1 A0
C
K
A
C
K
I3 I2
I3
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HIGH
I2
I1 I0
)
I1 I0
A
C
K
P1 P0 R1 R0
resistor segment towards the V
for each SCL clock pulse while SDA is LOW, the
selected wiper will move one resistor segment towards
the V
sequence and timing for this operation are shown in
Figures 5 and 6 respectively.
I3
P1 P0 R1 R0
I2
L
/R
I1
L
X
terminal. A detailed illustration of the
I0
C
A
K
X
CM DW D5 D4 D3 D2 D1 D0
P1 P0 R1 R0
Characteristics subject to change without notice.
A
C
K
N
C
1
I
N
C
2
I
H
/R
A
C
K
N
C
H
n
I
terminal. Similarly,
S
O
P
T
D
E
C
1
D
C
E
n
A
C
K
5 of 18
O
S
T
P
S
O
P
T