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參數資料
| 型號： | AT42QT1070-MMH |
| 廠商： | ATMEL CORP |
| 元件分類： | Proximity Sensor |
| 英文描述： | PROXIMITY SENSOR-CAPACITIVE, 0.6-2.6V, SQUARE, SURFACE MOUNT |
| 封裝： | 3 X 3 MM, 0.85 MM HEIGHT, 0.45 MM PITCH, ROHS COMPLIANT, PLASTIC, VQFN-20 |
| 文件頁數： | 7/38頁 |
| 文件大?。?/td> | 509K |
| 代理商： | AT42QT1070-MMH |
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15
9596A–AT42–10/10
AT42QT1070
4.
I2C-compatible Communications (Comms Mode Only)
4.1
I2C-compatible Protocol
4.1.1
Protocol
page 18) and supports multibyte reads and writes. The maximum clock rate is 400 kHz.
See Section A on page 31 for an overview of I
2C-compatible bus operation.
4.1.2
Signals
The I
2C-compatible interface requires two signals to operate:
SDA - Serial Data
SCL - Serial Clock
A third line, CHANGE, is used to signal when the device has seen a change in the status byte:
CHANGE: Open-drain, active low when any capacitive key has changed state since the last
I
2C-compatible read. After reading the two status bytes, this pin floats (high) again if it is
pulled up with an external resistor. If the status bytes change back to their original state
before the host has read the status bytes (for example, a touch followed by a release), the
CHANGE line is held low. In this case, a read to any memory location clears the CHANGE
line.
4.2
I2C-compatible Address
There is one preset I2C-compatible address of 0x1B. This is not changeable.
4.3
Data Read/Write
4.3.1
Writing Data to the Device
The sequence of events required to write data to the device is shown next.
1.
The host initiates the transfer by sending the START condition
2.
The host follows this by sending the slave address of the device together with the
WRITE bit.
Table 4-1.
Description of Write Data Bits
Key
Description
S
START condition
SLA+W
Slave address plus write bit
A
Acknowledge bit
MemAddress
Target memory address within device
Data
Data to be written
P
Stop condition
SLA+W
MemAddress
AA
S
Data
A
P
Host to Device
Device to Host
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| AT42QT1070-MMHR | |
| AT42QT1070-SSU | 功能描述:電容觸摸傳感器 QTouch 7 Ch. Touch Sensor IC RoHS:否 制造商:Microchip Technology 電源電壓: 通道數量: 封裝 / 箱體: 尺寸: 溫度范圍: |
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| AT42QT1070-SSUR | 功能描述:IC TOUCH SENSOR 7KEY 14SOIC 制造商:microchip technology 系列:QTouch?? 包裝:Digi-Reel? 零件狀態(tài):在售 類型:按鈕 接近探測:無 輸入數:最高 7 LED 驅動器通道:最高 5 接口:I2C 分辨率:- 電壓 - 電源:1.8 V ~ 5.5 V 電流 - 電源:- 工作溫度:-40°C ~ 85°C 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應商器件封裝:14-SOIC 標準包裝:1 |
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