X9438 Datasheet, PDF (6/18 Pages) Intersil Corporation – Dual Digitally Controlled Potentiometer (XDCP) with Operational Amplifier

X9438
Figure 6. Instruction Set
Read Wiper Counter Register (WCR)
Read the contents of the Wiper Counter Register P₀.
S device type
T identifier
A
device
addresses
S
A
instruction
opcode
WCR
addresses
S
A
register data
(sent by slave on SDA)
MS
AT
R
T
0
1
0
1
A
3
A
2
A
1
A
0
C
K
1
0
0
1
0
0
0
P
0
C
K
0
0
D
5
D
4
D
3
D
2
D
1
D
0
C
K
O
P
P0: 0 - WCR0, 1 - WCR1
Write Wiper Counter Register (WCR)
Write new value to the Wiper Counter Register P₀.
S device type device
instruction WCR
register data
T
A
R
T
identifier
0101
addresses
AAAA
3210
S
A
C
K
opcode
1010
addresses
0
0
0
P
0
S
A
(sent by master on SDA)
S
A
C
K
0
0
D
5
D
4
D
3
D
2
D
1
D
0
C
K
S
T
O
P
P0: 0 - WCR0, 1 - WCR1
Read Data Register (DR)
Read the contents of the Register pointed to by P₀ and R₁ - R₀.
S device type device
instruction WCR/DR
register data
T
A
R
T
identifier
0101
addresses
AAAA
3210
S
A
C
K
opcode
1011
addresses
R
1
R
0
0
P
0
S
A
C
K
(sent by master on SDA)
0
0
D
5
D
4
D
3
D
2
D
1
D
0
MS
AT
CO
KP
R1 R0:
00 - R0,
01 - R2,
10 - R1
11 - R3
Write Data Register (DR)
Write new value to the Register pointed to by P₀ and R₁ - R₀.
S device type
T identifier
A
device
addresses
S
A
R
T
0
1
0
1
A
3
A
2
A
1
A
0
C
K
instruction
opcode
1100
WCR/DR
addresses
R
1
R
0
0
P
0
S
A
register data
(sent by master on SDA)
S
A
S
T
C
K
0
0
D
5
D
4
D
3
D
2
D
1
D
0
C
K
O
P
HIGH-VOLTAGE
WRITE CYCLE
Definitions:
SACK - Slave acknowledge, MACK - Master acknowledge, I/D - Increment/Decrement (1/0), R - Register,
P - Potentiometer
6
FN8199.0
March 11, 2005