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參數(shù)資料
| 型號： | CAP1028-1-BP-TR |
| 廠商： | STANDARD MICROSYSTEMS CORP |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, QCC20 |
| 封裝： | 4 X 4 MM, ROHS COMPLAINT, QFN-20 |
| 文件頁數(shù)： | 11/69頁 |
| 文件大?。?/td> | 948K |
| 代理商： | CAP1028-1-BP-TR |
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8 Channel Capacitive Touch Sensor with 2 LED Drivers
Datasheet
SMSC CAP1028
19
Revision 1.0 (06-16-09)
DATASHEET
The host sends the specific read data command and continues clocking for as many data bytes as it
wishes to receive.
3.4.2
SPI Bi-Directional Mode
In the bi-directional mode of operation, the SPI data signals are combined into the SPI_MSIO line,
which is shared for data received by the device and transmitted by the device. The protocol uses a
simple handshake and turn around sequence for data communications based on the number of clocks
transmitted during each phase.
All basic transfers consist of two 8 bit transactions. The first is an 8 bit command phase driven by the
Master device. The second is by an 8 bit data phase driven by the Master for writes, and by the
CAP1028 for read operations.
The auto increment feature of the address pointer allows for successive reads or writes. The address
pointer will return to 00h after reaching FFh.
3.4.3
SPI_CS# Pin
The SPI Bus is a single master, multiple slave serial bus. Each slave has a dedicated CS pin (chip
select) that the master asserts low to identify that the slave is being addressed. There are no formal
addressing options.
3.4.4
Address Pointer
All data writes and reads are accessed from the current address pointer. In both Bi-directional mode
and Full Duplex mode, the Address pointer is automatically incremented following every read
command or every write command.
The address pointer will return to 00h after reaching FFh.
3.4.5
SPI Timeout
The CAP1028 does not detect any timeout conditions on the SPI bus.
3.5
Normal SPI Protocols
When operating in normal mode, the SPI bus internal address pointer is incremented depending upon
which command has been transmitted. Multiple commands may be transmitted sequentually so long
as the SPI_CS# pin is asserted low. Figure 3.1 shows an example of this operation.
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相關(guān)代理商/技術(shù)參數(shù) |
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| CAP1066 | 制造商:SMSC 制造商全稱:SMSC 功能描述:6 Channel Capacitive Touch Sensor with 6 LED Drivers |
| CAP1066-1-BP | 制造商:Microchip Technology Inc 功能描述: |
| CAP1066-1-BP-TR | 制造商:Microchip Technology Inc 功能描述:SIX CHANNEL CAPACITIVE TOUCH SENSOR WITH |
| CAP1088 | 制造商:SMSC 制造商全稱:SMSC 功能描述:8 Channel Capacitive Touch Sensor with 8 LED Drivers |
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