X9418 Datasheet, PDF (9/21 Pages) Xicor Inc. – Dual Digitally Controlled Potentiometers

X9418
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
AAAA
3210
S
A
C
K
instruction
opcode
1001
WCR
addresses
0
0
0
P
0
S
A
C
K
wiper position
(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 device
instruction WCR
wiper position
T
A
R
T
identifier
0101
addresses
AAAA
3210
S
A
C
K
opcode
1010
addresses
0
0
0
P
0
S
A
C
K
(sent by master on SDA)
S
A
WWWWWW _C
0
0
P
5
P
4
P
3
P
2
P
1
P
0
K
S
T
O
P
Read Data Register (DR)
S
T
A
R
T
device type
identifier
0101
device
addresses
AAAA
3210
S
A
C
K
instruction
opcode
1011
DR and WCR
addresses
R
1
R
0
0
P
0
S
A
C
K
wiper position/data
(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 Data Register (DR)
S device type
T identifier
A
device
addresses
S
A
instruction
opcode
R
T
0
1
0
1
A
3
A
2
A
1
A
0
C
K
1
1
0
0
DR and WCR
addresses
S
A
wiper position/data
(sent by master on SDA)
S
A
S
T
R
1
R
0
C
WWWWWWC _O
0
P0 _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
T identifier
device
addresses
S
A
instruction
opcode
DR and WCR
addresses
SS
AT
A
R
T
0
1
0
1
AA
32
A
1
AC
0K
1
1
0
1
R
1
R
0
0
P ^CO
0 KP
9
FN8194.0
March 7, 2005