X9428_06 Datasheet, PDF (11/21 Pages) Intersil Corporation – Single Digitally Controlled Potentiometer

X9428
Instruction Format
Notes: (1) “MACK”/”SACK”: stands for the acknowledge sent by the master/slave.
(2) “A3 ~ A0”: stands for the device addresses sent by the master.
(3) “X”: indicates that it is a “0” for testing purpose but physically it is a “don’t care” condition.
(4) “I”: stands for the increment operation, SDA held high during active SCL phase (high).
(5) “D”: stands for the decrement operation, SDA held low during active SCL phase (high).
Read Wiper Counter Register (WCR)
S
T
A
R
T
device type
identifier
0101
device
addresses
A
3
A
2
0
A
0
S
A
C
K
instruction
opcode
1001
0
0
0
0
S
A
C
K
wiper position
(sent by slave on SDA)
MS
AT
0
0
WWWWWW
PPPPPP
543210
C
K
O
P
Write Wiper Counter Register (WCR)
S
T
A
R
T
device type
identifier
0101
device
addresses
A
3
A
2
0
A
0
S
A
C
K
instruction
opcode
1010
0
0
0
0
S
A
C
K
wiper position
(sent by master on SDA)
S
A
0
0
W
P
5
W
P
4
W
P
3
W
P
2
W
P
1
W
P
0
C
K
S
T
O
P
Read Data Register (DR)
S
T
A
R
T
device type
identifier
0101
device
addresses
A
3
A
2
0
A
0
S
A
C
K
instruction
opcode
1011
register
addresses
R
1
R
0
0
0
S
A
C
K
wiper position/data
(sent by slave on SDA)
M
A
WWWWWWC
0
0
P
5
P
4
P
3
P
2
P
1
P
0
K
S
T
O
P
Write Data Register (DR)
S
T
A
R
T
device type
identifier
0101
device
addresses
A
3
A
2
0
A
0
S
A
C
K
instruction
opcode
1100
register
addresses
R
1
R
0
0
0
S
A
wiper position/data
(sent by master on SDA)
S
A
S
T
C
WWWWWWC _O
K
0
0
P
5
P
4
P
3
P
2
P
1
P
0
K
P
HIGH-VOLTAGE
WRITE CYCLE
XFR Data Register (DR) to Wiper Counter Register (WCR)
S
T
A
R
T
device type
identifier
0101
device
addresses
A
3
A
2
0
A
0
S
A
C
K
instruction
opcode
1101
register
addresses
R
1
R
0
0
0
S
A
C
K
S
T
O
P
11
FN8197.1
April 26, 2006