x9438 Intersil Corporation, x9438 Datasheet - Page 6

• Manufacturer Part Number: x9438
• Description: Dual Digitally Controlled Potentiometer Xdcp With Operational Amplifier
• Manufacturer: Intersil Corporation

Figure 6. Instruction Set
Read Wiper Counter Register (WCR)
Read the contents of the Wiper Counter Register P
Write Wiper Counter Register (WCR)
Write new value to the Wiper Counter Register P
Read Data Register (DR)
Read the contents of the Register pointed to by P
Write Data Register (DR)
Write new value to the Register pointed to by P
Definitions:
SACK - Slave acknowledge, MACK - Master acknowledge, I/D - Increment/Decrement (1/0), R - Register,
P - Potentiometer
R
R
R
R
S
T
A
T
S
T
A
T
S
T
A
T
S
T
A
T
device type
device type
device type
device type
0 1 0 1
0 1 0 1
0 1 0 1
0 1 0 1
identifier
identifier
identifier
identifier
A
A
A
3
A
3
3
3
addresses
addresses
addresses
addresses
device
device
device
device
A
A
A
2
2
2
A
2
A
A
A
1
1
1
A
1
A
A
A
0
0
0
A
0
6
C
C
S
A
C
K
S
A
K
S
A
K
C
S
A
K
1 0 1 1
1 0 0 1 0 0 0
1 0 1 0 0 0 0
1 1 0 0
instruction
instruction
instruction
instruction
opcode
opcode
opcode
opcode
R
1
addresses
addresses
addresses
R
0
1
WCR/DR
0
and R
addresses
0
WCR/DR
WCR
WCR
R
0
.
and R
R
0
0
0
.
1
0
P
P
P
0
0
0
- R
1
X9438
- R
C
0
S
A
C
K
S
A
C
K
S
A
K
P
0
P0: 0 - WCR0, 1 - WCR1
P0: 0 - WCR0, 1 - WCR1
R1 R0:
.
0
.
(sent by master on SDA)
(sent by master on SDA)
0 0
0 0
0 0
C
S
A
K
(sent by slave on SDA)
(sent by master on SDA)
0 0
register data
register data
register data
D
D
D
5
5
5
register data
D
D
D
4
4
4
D
5
D
D
D
3
3
3
D
4
00 - R0,
01 - R2,
D
D
D
2
2
2
D
3
D
D
D
1
1
1
D
2
D
D
D
0
0
0
D
1
M
M
A
C
K
A
C
K
S
A
C
K
D
0
O
S
P
O
O
T
S
T
P
S
T
P
S
A
C
K
10 - R1
11 - R3
O
S
T
P
HIGH-VOLTAGE
WRITE CYCLE
March 11, 2005
FN8199.0