X9429_08 Datasheet, PDF (10/20 Pages) Intersil Corporation – Single Digitally Controlled Potentiometer(XDCP™)

X9429
ONE 6-BIT WIPER COUNTER REGISTER FOR EACH
XDCP.
{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)
DEVICE
S
TYPE
DEVICE
INSTRUCTION
T ^{IDENTIFIER ADDRESSES} S ^OPCODE
WIPER POSITION
S ^{(SENT BY SLAVE ON SDA)} M S
A 0 1 0 1 A A 0 A A 1 0 0 1 0 0 0 0 A 0 0 WWWWWW A T
R
32
0C
C
P P P P P P CO
T
K
K
5 4 3 2 1 0KP
Write Wiper Counter Register (WCR)
DEVICE
S
TYPE
DEVICE
INSTRUCTION
T ^{IDENTIFIER ADDRESSES} S ^OPCODE
WIPER POSITION
S ^{(SENT BY MASTER ON SDA)} S S
A 0 1 0 1 A A 0 A A 1 0 1 0 0 0 0 0 A 0 0 WWWWWW A T
R
32
0C
C
P P P P P P CO
T
K
K
5 4 3 2 1 0KP
Read Data Register (DR)
DEVICE
S
TYPE
DEVICE
INSTRUCTION REGISTER
WIPER POSITION/DATA
T ^{IDENTIFIER ADDRESSES} S ^{OPCODE ADDRESSES} S ^{(SENT BY SLAVE ON SDA)} M S
A 0 1 0 1 A A 0 A A 1 0 1 1 R R 0 0 A 0 0 WWWWWW A T
R
32
0C
10
C
P P P P P P CO
T
K
K
5 4 3 2 1 0KP
Write Data Register (DR)
DEVICE
WIPER POSITION/DATA
S
TYPE
DEVICE
INSTRUCTION REGISTER
T ^{IDENTIFIER ADDRESSES} S ^{OPCODE ADDRESSES} S
(SENT BY MASTER ON
SDA)
SS
A 0 1 0 1 A A 0 A A 1 1 0 0 R R 0 0 A 0 0 WWWWWW A T
R
32
0C
10
C
P P P P P P CO
T
K
K
5 4 3 2 1 0KP
HIGH-VOLTAGE
WRITE CYCLE
10
FN8248.3
October 13, 2008