- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄223667 > DS1667S-10 (DALLAS SEMICONDUCTOR) SPECIALTY ANALOG CIRCUIT, PDSO20 PDF資料下載
參數(shù)資料
| 型號(hào)： | DS1667S-10 |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | 模擬信號(hào)調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO20 |
| 封裝： | SO-20 |
| 文件頁數(shù)： | 4/10頁 |
| 文件大?。?/td> | 228K |
| 代理商： | DS1667S-10 |
DS1667
3 of 10
101999
taken to a low level, which terminates data transfer. While RST input is low, the DQ and CLK inputs are
ignored.
Valid data is entered into the I/O shift register while RST is high on the low-to-high transition of the
CLK input. Data input on the DQ pin can be changed while the clock input is high or low, but only data
meeting the setup requirements will enter the shift register. Data is always entered starting with the value
of the stack select bit. The next 8 bits to be entered are those specifying the wiper 1 setting. The MSB of
these 8 bits is sent first. The next 8 bits to be entered are those specifying the wiper 0 setting, sent MSB
first. The 17
th bit to be entered, therefore, will be the least significant bit of the wiper 0 setting. If fewer
than 17 bits are entered, the value of the potentiometer settings will result from the number of bits that
were entered plus the remaining bits of the old value shifted over by the number of bits sent. If more than
17 bits are sent, only the last 17 bits are left in the shift register. Therefore, sending other than 17 bits can
produce indeterminate potentiometer settings.
As bits are entered into the shift register, the previous value is shifted out bit by bit on the cascade serial
port pin (COUT). By connecting the COUT pin to the DQ pin of a second DS1667, multiple devices can
be daisy chained together as shown in Figure 3.
When connecting multiple devices, the total number of bits sent is always 17 times the number of
DS1667s in the daisy chain. In applications where it is desirable to read the settings of potentiometers, the
COUT pin of the last device connected in a daisy chain must be connected back to the DQ input of the
first device through a resistor with a value of 1k to 10k. This resistor provides isolation between COUT
and DQ when writing to the device (see Figure 3).
When reading data, the DQ line is left floating by the reading device. When RST is held low, bit 17 is
always present on the COUT pin, which is fed back to the input DQ pin through the resistor (see Figure
4). This data bit can now be read by the reading device. The RST pin is then transitioned high to initiate a
data transfer. When the CLK input transitions low to high, bit 17 is loaded into the first position of the
I/O shift register and bit 16 becomes present on COUT and DQ. After 17 bits (or 17 times the number of
devices for a daisy chain), the data has shifted completely around and back to its original position. When
RST
is transitioned back low to end data transfer, the value (the same as before the read occurred) is
loaded into the wiper 0 and wiper 1 registers and the stack select bit.
When power is applied to the DS1667, the device always has the wiper settings at half position and the
stack select bit is at 0.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS1832N | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDIP8 |
| DS2720CU/T&R | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| DS36F95J | EIA-485/EIA-422A Differential Bus Transceiver |
| DS36F95 | EIA-485/EIA-422A Differential Bus Transceiver |
| DS4302Z-019/T&R | SPECIALTY ANALOG CIRCUIT, PDSO8 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1667S100 | 制造商:Maxim Integrated Products 功能描述: |
| DS1667S-100 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Feedback Operational Amplifier |
| DS1667S-50 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Feedback Operational Amplifier |
| DS1667SN-10 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Feedback Operational Amplifier |
| DS1667SN-100 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Feedback Operational Amplifier |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。