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參數(shù)資料
| 型號： | X9408YB24I-2.7 |
| 廠商： | INTERSIL CORP |
| 元件分類： | 數(shù)字電位計 |
| 英文描述： | QUAD 2.5K DIGITAL POTENTIOMETER, 2-WIRE SERIAL CONTROL INTERFACE, 64 POSITIONS, BGA24 |
| 封裝： | BUMP, CSP-24 |
| 文件頁數(shù)： | 18/22頁 |
| 文件大?。?/td> | 395K |
| 代理商： | X9408YB24I-2.7 |
5
FN8191.0
March 3, 2005
Figure 3. Two-Byte Instruction Sequence
The Increment/Decrement command is different from
the other commands. Once the command is issued
and the X9408 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
(tHIGH) while SDA is HIGH, the selected wiper will
move one resistor segment towards the RH terminal.
Similarly, for each SCL clock pulse while SDA is LOW,
the selected wiper will move one resistor segment
towards the RL 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
S
T
A
R
T
0101
A3
A2
A1
A0
A
C
K
I3
I2
I1
I0
R1
R0
P1 P0
A
C
K
SCL
SDA
S
T
O
P
Instruction
Instruction Set
Operation
I3
I2
I1
I0 R1 R0
P1
P0
Read Wiper Counter
Register
1
001
0
P1
P0 Read the contents of the Wiper Counter Register
pointed to by P1 - P0
Write Wiper Counter
Register
1
010
0
P1
P0 Write new value to the Wiper Counter Register pointed
to by P1 - P0
Read Data Register
1
0
1
R1 R0
P1
P0 Read the contents of the Data Register pointed to by
P1 - P0 and R1 - R0
Write Data Register
1
0
R1 R0
P1
P0 Write new value to the Data Register pointed to by
P1 - P0 and R1 - R0
XFR Data Register to
Wiper Counter Register
1
101
R1 R0
P1
P0 Transfer the contents of the Data Register pointed to
by P1 - P0 and R1 - R0 to its associated Wiper Counter
Register
XFR Wiper Counter
Register to Data
Register
1
110
R1 R0
P1
P0 Transfer the contents of the Wiper Counter Register
pointed to by P1 - P0 to the Data Register pointed to
by R1 - R0
Global XFR Data Regis-
ters to Wiper Counter
Registers
0
001
R1 R0
0
Transfer the contents of the Data Registers pointed to by
R1 - R0 of all four pots to their respective Wiper Counter
Registers
Global XFR Wiper
Counter Registers to
Data Register
1
000
R1 R0
0
Transfer the contents of both Wiper Counter Registers
to their respective Data Registers pointed to by
R1 - R0 of all four pots
Increment/Decrement
Wiper Counter Register
0
010
0
P1
P0 Enable Increment/decrement of the Wiper Counter
Register pointed to by P1 - P0
X9408
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