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參數(shù)資料
| 型號(hào)： | DS2890 |
| 元件分類： | 數(shù)字電位計(jì) |
| 英文描述： | 1-Wire Digital Potentiometer |
| 中文描述： | 1-Wire數(shù)字電位器 |
| 文件頁數(shù)： | 16/27頁 |
| 文件大?。?/td> | 939K |
| 代理商： | DS2890 |
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DS2890
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RESUME COMMAND [A5H]
In a typical application the DS2890 may be accessed several times to complete a control adjustment. In a
multi-drop environment this means that the 64-bit ROM sequence of a Match ROM command has to be
repeated for every access. To maximize the data throughput in a multi-drop environment the Resume
Command function was implemented. As shown in Figure 19, this function checks the status of the RC
flag and, if it is set, directly transfers control to the potentiometer functions, similar to a Skip ROM
command. The only way to set the RC flag is through successfully executing the Match ROM, Search
ROM, Conditional Search ROM, or Overdrive Match ROM command. Once the RC flag is set, the
device can repeatedly be accessed through the Resume Command function. Accessing another device on
the bus will clear the RC flag, preventing two or more devices from simultaneously responding to the
Resume Command function.
POTENTIOMETER FUNCTION EXAMPLE
At regular speed with an auxiliary supply (V
DD
within range): turn on the charge pump, set the wiper
position to mid-point, increment the wiper twice, and decrement the wiper once.
MASTER MODE
DATA (LSB FIRST)
COMMENTS
TX
Reset
Reset Pulse (480 - 960
μ
s)
Presence Pulse
RX
Presence
TX
CCh
Issue Skip ROM Command
TX
55h
Issue Write Control Register Command
TX
4Ch
Issue Control Register value for WN=0, CPC=1
RX
<data byte>
Read back Control Register value (4Ch) and verify
TX
96h
Issue Release Code to update Control Register
RX
<data bits>
If 0’s are read, update was successful; if 1’s are read,
the update failed
TX
Reset
Reset Pulse (480 - 960
μ
s)
Presence Pulse
RX
Presence
TX
CCh
Issue Skip ROM Command
TX
0Fh
Issue Write Position Command
TX
7Fh
Write Wiper Position value
RX
<data byte>
Read back Wiper Position byte and verify
TX
96h
Issue Release Code to update Wiper Position
RX
<data bits>
If 0’s are read, update was successful; if 1’s are read,
the update failed
TX
Reset
Reset Pulse
RX
Presence
Presence Pulse
TX
CCh
Issue Skip ROM Command
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS2890-000 | 功能描述:數(shù)字電位計(jì) IC 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 |
| DS2890-000+ | 功能描述:數(shù)字電位計(jì) IC 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 |
| DS2890-000+T&R | 功能描述:數(shù)字電位計(jì) IC 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 |
| DS2890P | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:1-Wire Digital Potentiometer |
| DS2890P-000 | 功能描述:數(shù)字電位計(jì) IC 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 |
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