X9428 Datasheet, PDF (9/20 Pages) Xicor Inc. – 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 device type device
instruction
wiper position
T
A
R
T
identifier
0101
addresses
A
3
A
2
0
A
0
S
A
C
K
opcode
1001
0
0
0
0
S
A
C
K
(sent by slave on SDA)
MS
AT
WWWWWWC _O
0
0
P
5
P
4
P
3
P
2
P
1
P
0
K
P
Write Wiper Counter Register (WCR)
S device type
T identifier
device
addresses
S
instruction
opcode
S
wiper position
(sent by master on SDA)
S
S
A
R
T
0
1
0
1
A
3
A
2
0
A
0
A
C
K
1
0
1
0
0
0
0
0
A
C
K
0
0
AT
WWWWWWC _O
P
5
P
4
P
3
P
2
P
1
P
0
K
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 device type device _S instruction register _{S S}
T
A
R
T
identifier
0101
addresses
A
3
A
2
0
A
0
A
C
K
opcode
1101
addresses
RR
10
0
0
A
C
K
T
O
P
REV 1.1.5 7/8/03
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Characteristics subject to change without notice. 9 of 20