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參數資料
| 型號： | X9409WV24I-2.7 |
| 廠商： | INTERSIL CORP |
| 元件分類： | 數字電位計 |
| 英文描述： | Low Noise/Low Power/2-Wire Bus |
| 中文描述： | QUAD 10K DIGITAL POTENTIOMETER, 2-WIRE SERIAL CONTROL INTERFACE, 64 POSITIONS, PDSO24 |
| 封裝： | 4.4 MM, PLASTIC, TSSOP-24 |
| 文件頁數： | 5/21頁 |
| 文件大?。?/td> | 407K |
| 代理商： | X9409WV24I-2.7 |
X9409 – Preliminary Information
Characteristics subject to change without notice.
5 of 21
REV 1.6 1/30/03
www.xicor.com
Figure 3. Two-Byte Instruction Sequence
S
T
A
R
T
0
1
0
1
A3
A2
A1
A0
A
C
K
I3
I2
I1
I0
R1
R0
P1
P0
A
C
K
SCL
SDA
S
T
O
P
The Increment/Decrement command is different from
the other commands. Once the command is issued and
the X9409 has responded with an acknowledge, the
master can clock the selected wiper up and/or down in
one segment steps; thereby, providing a fine tuning
capability to the host. For each SCL clock pulse (t
HIGH
)
while SDA is HIGH, the selected wiper will move one
resistor segment towards the V
H
/R
H
terminal. Similarly,
for each SCL clock pulse while SDA is LOW, the
selected wiper will move one resistor segment towards
the V
L
/R
L
terminal. A detailed illustration of the
sequence and timing for this operation are shown in
Figures 5 and 6 respectively.
Table 1. Instruction Set
Note:
(7) 1/0 = data is one or zero
Instruction
Read Wiper Counter
Register
Write Wiper Counter
Register
Read Data Register
Instruction Set
I
0
1
Operation
I
3
1
I
2
0
I
1
0
R
1
0
R
0
0
P
1
P
1
P
0
P
0
Read the contents of the Wiper Counter
Register pointed to by P
1
–P
0
Write new value to the Wiper Counter Register
pointed to by P
1
–P
0
Read the contents of the Data Register pointed
to by P
1
–P
0
and R
1
–R
0
Write new value to the Data Register pointed to
by P
1
–P
0
and R
1
–R
0
Transfer the contents of the Data Register
pointed to by P
1
–P
0
and R
1
–R
0
to its associated
Wiper Counter Register
Transfer the contents of the Wiper Counter
Register pointed to by P
1
–P
0
to the Data
Register pointed to by R
1
–R
0
Transfer the contents of the Data Registers
pointed to by R
1
–R
0
of all four pots to their
respective Wiper Counter Registers
Transfer the contents of both Wiper Counter
Registers to their respective Data Registers
pointed to by R
1
–R
0
of all four pots
Enable Increment/decrement of the WCR Latch
pointed to by P
1
–P
0
1
0
1
0
0
0
P
1
P
0
1
0
1
1
R
1
R
0
P
1
P
0
Write Data Register
1
1
0
0
R
1
R
0
P
1
P
0
XFR Data Register to
Wiper Counter Register
1
1
0
1
R
1
R
0
P
1
P
0
XFR Wiper Counter
Register to Data
Register
Global XFR Data
Registers to Wiper
Counter Registers
Global XFR Wiper
Counter Registers to
Data Register
Increment/Decrement
Wiper Counter Register
1
1
1
0
R
1
R
0
P
1
P
0
0
0
0
1
R
1
R
0
0
0
1
0
0
0
R
1
R
0
0
0
0
0
1
0
0
0
P
1
P
0
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PDF描述 |
|---|---|
| X9409WV24IZ | Low Noise/Low Power/2-Wire Bus |
| X9409WV24IZ-2.7 | Low Noise/Low Power/2-Wire Bus |
| X9409WV24Z | Low Noise/Low Power/2-Wire Bus |
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