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參數(shù)資料
| 型號(hào)： | X9118TV14-2.7 |
| 廠商： | INTERSIL CORP |
| 元件分類： | 數(shù)字電位計(jì) |
| 英文描述： | Dual Suply/Low Power/1024-Tap/2-Wire Bus |
| 中文描述： | 100K DIGITAL POTENTIOMETER, 2-WIRE SERIAL CONTROL INTERFACE, 1024 POSITIONS, PDSO14 |
| 封裝： | PLASTIC, MO-153AC, TSSOP-14 |
| 文件頁數(shù)： | 8/20頁 |
| 文件大?。?/td> | 348K |
| 代理商： | X9118TV14-2.7 |
8
FN8161.1
March 25, 2005
Table 4. Wiper Control Register, WCR (10-bit), WCR9–WCR0:
Used to store the current wiper position (Volatile, V)
Table 5. Data Register, DR (10-bit), Bit 9–Bit 0:
Used to store wiper positions or data (Non-Volatile, NV)
Four of the six instructions are four bytes in length.
These instructions are:
–
Read Wiper Counter Register
– read the current
wiper position of the potentiometer,
–
Write Wiper Counter Register
– change current
wiper position of the potentiometer,
–
Read Data Register
– read the contents of the
selected Data Register;
–
Write Data Register
– write a new value to the
selected Data Register.
The basic sequence of the four byte instructions is
illustrated in Figure 3. These four-byte instructions
exchange data between the WCR and one of the Data
Registers. A transfer from a data register to a WCR is
essentially a write to a static RAM, with the static RAM
controlling the wiper position. The response of the
wiper to this action will be delayed by t
WRL
. A transfer
from the WCR (current wiper position), to a data
register is a write to nonvolatile memory and takes a
minimum of t
WR
to complete. The transfer can occur
between the potentiometer and one of its associated
registers.
Two instructions (see Figure 4) require a two-byte
sequence to complete. These instructions transfer
data between the host and the X9118; either between
the host and one of the Data Registers or directly
between the host and the Wiper Counter Register.
These instructions are:
–
XFR Data Register to Wiper Counter Register
–
This transfers the contents of one specified Data
Register to the Wiper Counter Register.
–
XFR Wiper Counter Register to Data Register
–
This transfers the contents of the specified Wiper
Counter Register to the specified Data Register.
See Instruction format for more details.
Other
P
OWER
U
P
AND
D
OWN
R
EQUIREMENTS
At all times, the V+ voltage must be greater than or
equal to the voltage at R
H
or R
L
, and the voltage at R
H
or R
L
must be greater than or equal to the voltage at
V-. During power up and power down, V
CC
, V+, and
V- must reach their final values with 1msec of each
other.
Figure 3. Two-Byte Instruction Sequence
WCR9
WCR8
WCR7
WCR6
WCR5
WCR4
WCR3
WCR2
WCR1
WCR0
V
V
V
V
V
V
V
V
V
V
(MSB)
(LSB)
Bit 9
Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
NV
NV
NV
NV
NV
NV
NV
NV
NV
NV
MSB
LSB
S
T
A
R
T
0
1
0
1
0
A1
A0 R/W
A
C
K
I2
I1
I0
0
RB RA 0
A
C
K
SCL
SDA
S
T
O
P
0
0
0
ID3 ID2 ID1 ID0
Device ID
Internal
Address
Instruction
Opcode
Register
Address
X9118
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| X9118TV14I | Dual Suply/Low Power/1024-Tap/2-Wire Bus |
| X9118TV14I-2.7 | Dual Suply/Low Power/1024-Tap/2-Wire Bus |
| X9250TS24IZ | Quad Digitally Controlled Potentiometers |
| X9250TS24IZ-2.7 | Quad Digitally Controlled Potentiometers |
| X9250TS24Z-2.7 | Quad Digitally Controlled Potentiometers |
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