X9408_14 Datasheet, PDF (9/20 Pages) Intersil Corporation – Quad Digitally Controlled Potentiometers

X9408
TABLE 3.
WP5
V
(MSB)
WIPER COUNTER REGISTER, (6-BIT), VOLATILE
WP4 WP3 WP2 WP1 WP0
V
V
V
V
V
(LSB)
One 6-bit Wiper Counter Register for each XDCP. (Four 6-bit
registers in total.)
{D5~D0}: These bits specify the wiper position of the
respective XDCP. The Wiper Counter Register is loaded on
power-up by the value in Data Register 0. The contents of
the WCR can be loaded from any of the other Data Register
or directly. The contents of the WCR can be saved in a DR.
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
T IDENTIFIER
ADDRESSES S
OPCODE
A
A
R ^{0 1 0 1 A3 A2 A1 A0} C ^{1 0 0 1}
T
K
WCR
ADDRESSES S
A
0 0 P1 P0 _C 0
K
WIPER POSITION
(SENT BY SLAVE ON SDA)
MS
AT
0 WP WP WP WP WP WP _{C O}
5 4 3 2 1 0 _KP
Write Wiper Counter Register (WCR)
S DEVICE TYPE
DEVICE
T IDENTIFIER
ADDRESSES S
A
A
R ^{0 1 0 1 A3 A2 A1 A0} C
T
K
INSTRUCTION
OPCODE
1010
WCR
ADDRESSES S
A
0 0 P1 P0 _C
K
WIPER POSITION
(SENT BY MASTER ON SDA)
SS
AT
0 0 WWWWWW _{C O}
P5 P4 P3 P2 P1 P0 _{K P}
Read Data Register (DR)
S DEVICE TYPE
DEVICE
T IDENTIFIER
ADDRESSES S
A
A
R ^{0 1 0 1 A3 A2 A1 A0} C
T
K
INSTRUCTION
OPCODE
1011
DR AND WCR
ADDRESSES
S
A
R1 R0 P1 P0 _C
K
WIPER POSITION/DATA
(SENT BY SLAVE ON SDA)
MS
AT
0 0 WWWWWW _{C O}
P5 P4 P3 P2 P1 P0 _{K P}
Write Data Register (DR)
S DEVICE TYPE
DEVICE
T IDENTIFIER ADDRESSES S
A
A
R ^{0 1 0 1 A3 A2 A1 A0} C
T
K
INSTRUCTION
OPCODE
1100
DR AND WCR
ADDRESSES S
A
R1 R0 P1 P0 _C
K
WIPER POSITION/DATA
(SENT BY MASTER ON SDA) S S
AT
0 0 WWWWWW_CO
P5 P4 P3 P2 P1 P0 _{K P}
HIGH-VOLTAGE
WRITE CYCLE
XFR Data Register (DR) to Wiper Counter Register (WCR)
S
DEVICE TYPE
DEVICE
T
IDENTIFIER
ADDRESSES
S
A
A
R
0
1
0
1
A3 A2 A1 A0 _C
T
K
INSTRUCTION
OPCODE
1
1
0
1
DR AND WCR
ADDRESSES
SS
AT
R1
R0
P1
P0
C
O
KP
9
FN8191.4
January 15, 2009