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QST108 bảng dữ liệu(PDF) 15 Page - STMicroelectronics

tên linh kiện QST108
Giải thích chi tiết về linh kiện  Capacitive touch sensor device 8 keys with individual key state outputs or I2C interface
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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QST108 bảng dữ liệu(HTML) 15 Page - STMicroelectronics

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QST108
Device operating modes
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Output mode option
The QST108 offers several outputs mode to fit any existing application.
4.5
I2C mode
The I2C mode offers the largest configurability and functionality of the QST108.
4.5.1
Main features
●
Five general-purpose outputs
●
Configuration of up to 8 AKS groups
●
Additional low power modes
●
Accessible internal capacitive sensing parameters
●
Continuous range of Max On-Duration
Table 7.
Output mode (OM) truth table
OPT6/OM
Description
VSS
Individual key state output mode: One output per sensing channel
VDD
BCD output mode: Binary-coded touched key number (see Table 8)(1)
1.
In BCD mode, the AKS function is always active.
Table 8.
Binary code truth table
KOUT4 KOUT3 KOUT2 KOUT1
Description
0
0
0
0
All released
0
0
0
1
Key 1 pressed
0
0
1
0
Key 2 pressed
0
0
1
1
Key 3 pressed
0
1
0
0
Key 4 pressed
0
1
0
1
Key 5 pressed
0
1
1
0
Key 6 pressed
0
1
1
1
Key 7 pressed
1
0
0
0
Key 8 pressed
Other
Not used



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