QST104 STMicroelectronics, QST104 Datasheet - Page 17

• Manufacturer Part Number: QST104
• Description: Capacitive touch sensor device 4 keys
• Manufacturer: STMicroelectronics

QST104
4.6.2
Figure 4.
General-purpose outputs
I
configured in output push pull mode 0 by default. Their state can be changed using the
SET_GPIO_STATE I
2
C mode allows to drive up to 13 general-purpose outputs. These output pins are
Key4
Key3
Key2
Key1
V
UNREG
Keep these parts close to IC
I
2
C mode typical schematic
10kΩ
10kΩ
10kΩ
10kΩ
R
R
R
R
4.7µF
S4
S3
S2
S1
Volt. Reg.
2.4~5.5V
C
C
C
C
2
S4
S3
S2
S1
C command.
21
20
19
18
17
16
15
14
4.7µF
SNSK_SCK4
SNS_SCK4
SNSK_SCK3
SNS_SCK3
SNSK_SCK2
SNS_SCK2
SNSK_SCK1
SNS_SCK1
V
SS_1
9
100nF
V
V
SS_2
DD_1
10
8
V
MODE/GPO1
V
ADD2/GPO4
ADD1/GPO3
ADD0/GPO2
SS_3
DD_2
11
13
I2C_SDA
I2C_SCL
V
RESET
GPO13
GPO12
GPO11
GPO10
100nF
GPO9
GPO8
GPO7
GPO6
GPO5
DD
V
IRQ
SS_4
12
29
28
27
26
25
23
22
2
1
32
31
30
5
4
3
6
24
Device operating modes
10nF
1MΩ
1MΩ
1MΩ
1MΩ
V
DD
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GPO13
GPO11
GPO10
GPO9
GPO5
GPO4
V
V
GPO3
V
V
GPO2
V
V
GPO1
V
GPO12
GPO8
GPO7
GPO6
To Host
To
Host
MCU
DD
SS
DD
SS
DD
SS
SS
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