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QST108AM0 数据表(PDF) 19 Page - STMicroelectronics

部件名 QST108AM0
功能描述  Capacitive touch sensor device 8 keys with individual key state outputs or I2C interface
PDF  51 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

QST108AM0 数据表(HTML) 19 Page - STMicroelectronics

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QST108
Device operating modes
19/51
4.6
I2C mode
The I2C mode offers the largest configurability and functionality of the QST108.
4.6.1
Main features
●
5 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
Figure 6.
I2C mode typical schematic
Ai12559
I2C_SCL
I2C_SDA
GPO5
ADD2/GPO4
ADD1/GPO3
ADD0/GPO2
MODE/GPO1
VSS_1
VSS_2
VSS_3
VSS_4
SNS_SCK1
SNSK_SCK1
VDD_1
VDD_2
RESET
IRQ
Key1
SNS_SCK8
SNSK_SCK8
Key8
SNS_SCK7
SNSK_SCK7
Key7
VDD
To
Host
MCU
RS8
RS7
RS1
10k
Ω
10k
Ω
10k
Ω
CS8
CS7
CS1
SNS_SCK2
SNSK_SCK2
Key2
RS2
10k
Ω C
S2
SNS_SCK3
SNSK_SCK3
Key3
RS3
10k
Ω C
S3
SNS_SCK4
SNSK_SCK4
Key4
RS4
10k
Ω C
S4
SNS_SCK5
SNSK_SCK5
Key5
RS5
10k
Ω C
S5
SNS_SCK6
SNSK_SCK6
Key6
RS6
10k
Ω C
S6
VUNREG
4.7µF
4.7µF
2.4~5.5V
Volt. Reg.
100nF
100nF
To Host
10nF
Keep these parts close to IC
3
4
5
6
8
910
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
1
2
30
31
32
GPO5
1M
Ω
VDD
VSS
GPO4
1M
Ω
VDD
VSS
GPO3
1M
Ω
VDD
VSS
GPO2
1M
Ω
VSS
GPO1
VDD



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