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QST104 Datasheet(PDF) 6 Page - STMicroelectronics

Part # QST104
Description  Capacitive touch sensor device 4 keys with individual key state outputs or I2C interface
PDF  45 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

QST104 Datasheet(HTML) 6 Page - STMicroelectronics

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Pin description
QST104
6/45
6
RESET
BD
Reset (active low)
10nF
capacitor to
ground
7
NC
Not connected
8VDD_1
S
Supply voltage
9VSS_1
S
Ground voltage
10
VSS_2
S
Ground voltage
11
VSS_3
S
Ground voltage
12
VSS_4
S
Ground voltage
13
VDD_2
S
Supply voltage
14
SNS_SCK1
SNS
Key 1 sense pin to Cs
Open
15
SNSK_SCK1
SNS
Key 1 sense pin to Cs/Rs
Open
16
SNS_SCK2
SNS
Key 2 sense pin to Cs
Open
17
SNSK_SCK2
SNS
Key 2 sense pin to Cs/Rs
Open
18
SNS_SCK3
SNS
Key 3 sense pin to Cs
Open
19
SNSK_SCK3
SNS
Key 3 sense pin to Cs/Rs
Open
20
SNS_SCK4
SNS
Key 4 sense pin to Cs
Open
21
SNSK_SCK4
SNS
Key 4 sense pin to Cs/Rs
Open
22
GPO6
PP
General-purpose output 6
Open
23
GPO7
PP
General-purpose output 7
Open
24
GPO8
PP
General-purpose output 8
Open
25
GPO9
PP
General-purpose output 9
Open
26
GPO10
PP
General-purpose output 10
Open
27
GPO11
PP
General-purpose output 11
Open
28
GPO12
PP
General-purpose output 12
Open
29
GPO13
PP
General-purpose output 13
Open
30
GPO1/OPT1/KOUT1 (2)
PP (HS)
Key 1 output / BCD output 1
and MODE option resistor
General-purpose output 1
and MODE option resistor
Option
resistor
31
GPO2/OPT2/KOUT2 (2)
PP (HS)
Key 2 output / BCD output 2
and AKS option resistor
General-purpose output 2
and I2C address bit 0
option resistor
Option
resistor
32
GPO3/OPT3/KOUT3 (2)
PP (HS)
Key 3 output / BCD output 3
and LP option resistor
General-purpose output 3
and I2C address bit 1
option resistor
Option
resistor
1.
S: supply pin, BD: bidirectional pin, SNS: capacitive sensing pin, PP: Output push-pull, OD: Output open-drain,
TOD: Output true open-drain and HS: 20mA high sink (on N-buffer only)
2.
During the reset phase, these pins are floating and the state depends on the option resistor.
3.
An external pull-up is required on these pins.
Table 2.
Device pin description (continued)
Pin
Pin name
Type (1)
Stand-alone mode function
I2C mode function
If unused



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