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參數(shù)資料
| 型號(hào)： | CAT5251UI-50TE13 |
| 元件分類： | 數(shù)字電位計(jì) |
| 英文描述： | Quad Digitally Programmable Potentiometer (DPP) with 256 Taps and SPI Interface |
| 中文描述： | 四數(shù)字可編程電位（民進(jìn)黨）與256水龍頭和SPI接口 |
| 文件頁(yè)數(shù)： | 9/15頁(yè) |
| 文件大?。?/td> | 95K |
| 代理商： | CAT5251UI-50TE13 |
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9
CAT5251
Document No. 2017, Rev. D
Table 3. Instruction Set
WIPER CONTROL AND DATA REGISTERS
Wiper Control Register (WCR)
The CAT5251 contains four 8-bit Wiper Control
Registers, one for each potentiometer. The Wiper
Control Register output is decoded to select one of
256 switches along its resistor array. The contents of
the WCR can be altered in four ways: it may be written
by the host via Write Wiper Control Register instruction;
it may be written by transferring the contents of one of
four associated Data Registers via the XFR Data
Register instruction; it can be modified one step at a
time by the Increment/decrement instruction (see
Instruction section for more details). Finally, it is
loaded with the content of its data register zero (DR0)
upon power-up.
The Wiper Control Register is a volatile register that
loses its contents when the CAT5251 is powered-down.
Although the register is automatically loaded with the
value in DR0 upon power-up, this may be different from
the value present at power-down.
Data Registers (DR)
Each potentiometer has four 8-bit non-volatile Data
Registers. These can be read or written directly by the
host. Data can also be transferred between any of the
four Data Registers and the associated Wiper Control
Register. Any data changes in one of the Data Registers
is a non-volatile operation and will take a maximum of
5ms.
If the application does not require storage of multiple
settings for the potentiometer; the Data Registers can be
used as standard memory locations for system
parameters or user preference data.
Write in Process
The contents of the Data Registers are saved to
nonvolatile memory when the
CS
input goes HIGH after
a write sequence is received. The status of the internal
write cycle can be monitored by issuing a Read Status
command to read the Write in Process (WIP) bit.
INSTRUCTIONS
Five of the ten instructions are three bytes in length.
These instructions are:
—
Read Wiper Control Register
- read the current
wiper position of the selected potentiometer in the WCR
—
Write Wiper Control Register
- change current
wiper position in the WCR of the selected potentiometer
—
Read Data Register
- read the contents of the
selected Data Register
Note:
1/0 = data is one or zero
Instruction
Instruction Set
Operation
I3
1
I2
0
I1
0
I0
1
R1
0
R0
0
WCR1/
P1
1/0
Read Wiper Control
Register
Write Wiper Control Register
1/0
Read the contents of the Wiper Control
Register pointed to by P1-P0
Write new value to the Wiper Control
Register pointed to by P1-P0
Read the contents of the Data Register
pointed to by P1-P0 and R1-R0
Write new value to the Data Register
pointed to by P1-P0 and R1-R0
Transfer the contents of the Data Register
pointed to by P1-P0 and R1-R0 to its
associated Wiper Control Register
Transfer the contents of the Wiper Control
Register pointed to by P1-P0 to the Data
Register pointed to by R1-R0
Transfer the contents of the Data Registers
pointed to by R1-R0 of all four pots to their
respective Wiper Control Register
Transfer the contents of both Wiper Control
Registers to their respective data Registers
pointed to by R1-R0 of all four pots
Enable Increment/decrement of the Control
Latch pointed to by P1-P0
Read WIP bit to check internal
write cycle status
1
0
1
0
0
0
1/0
1/0
Read Data Register
1
0
1
1
1/0
1/0
1/0
1/0
Write Data Register
1
1
0
0
1/0
1/0
1/0
1/0
XFR Data Register to Wiper
Control Register
1
1
0
1
1/0
1/0
1/0
1/0
XFR Wiper Control Register
to Data Register
1
1
1
0
1/0
1/0
1/0
1/0
Global XFR Data
Registers
to Wiper Control Registers
0
0
0
1
1/0
1/0
0
0
Global XFR Wiper Control
Registers to Data Register
1
0
0
0
1/0
1/0
0
0
Increment/Decrement Wiper
Control Register
0
0
1
0
0
0
1/0
1/0
WCR0/
P0
Read Status (WIP bit)
0
1
0
1
0
0
0
1
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|---|---|
| CAT5251 | Quad Digitally Programmable Potentiometer (DPP) with 256 Taps and SPI Interface |
| CAT5251JI-50TE13 | Quad Digitally Programmable Potentiometer (DPP) with 256 Taps and SPI Interface |
| CAT5251WI-50TE13 | Quad Digitally Programmable Potentiometer (DPP) with 256 Taps and SPI Interface |
| CAT5251YI-50TE13 | Quad Digitally Programmable Potentiometer (DPP) with 256 Taps and SPI Interface |
| CAT5251YI-00TE13 | Quad Digitally Programmable Potentiometer (DPP) with 256 Taps and SPI Interface |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CAT5251WI00 | 制造商:ON Semiconductor 功能描述:DPP, NV, QUAD 256 TAPS, SPI - Rail/Tube |
| CAT5251WI-00 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Catalyst Semiconductor 功能描述: |
| CAT5251WI-00-T1 | 功能描述:數(shù)字電位計(jì) IC DPP NV QUAD 256 TAP SPI RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數(shù):35 PPM / C 容差:25 % POT 數(shù)量:Dual 每 POT 分接頭:256 弧刷存儲(chǔ)器:Volatile 緩沖刷: 數(shù)字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| CAT5251WI50 | 功能描述:數(shù)字電位計(jì) IC Ind Temp 50K Up/Dwn Quad 256-Tap SPI RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數(shù):35 PPM / C 容差:25 % POT 數(shù)量:Dual 每 POT 分接頭:256 弧刷存儲(chǔ)器:Volatile 緩沖刷: 數(shù)字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| CAT5251WI-50 | 制造商:ON Semiconductor 功能描述:IC DIGITAL POT 50KOHM 256 QUAD SOIC-24 |
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