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QST104 Datasheet(PDF) 24 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) 24 Page - STMicroelectronics

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Device operating modes
QST104
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GPO state description
GPOState
Defines the state of the selected general-purpose output pin. For more information, see
Section 4.6.2: General-purpose outputs on page 17.
0: GPO state is ‘0’
1: GPO state is ‘1’
AKS group mode description
AKSGrpnMode
Defines the type of AKS for the Group n:
0: Locking AKS
First key pressed within the group locks out all other keys.
1: Unlocking AKS
Most heavily pressed key (highest signal level) is selected over all other
keys in the group.
AKS group selection description
Grpx
The selected key is a member of AKS Group x.
Table 16.
GPOState
Byte
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
GPOState1
GPO 8
state
GPO 7
state
GPO 6
state
GPO 5
state
GPO 4
state
GPO 3
state
GPO 2
state
GPO 1
state
GPOState2
0
0
0
GPO 13
state
GPO 12
state
GPO 11
state
GPO 10
state
GPO 8
state
Table 17.
AKSGrpnMode
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
AKSGrp8
Mode
AKSGrp7
Mode
AKSGrp6
Mode
AKSGrp5
Mode
AKSGrp4
Mode
AKSGrp3
Mode
AKSGrp2
Mode
AKSGrp1
Mode
Table 18.
KeynGrp
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Grp8
Grp7
Grp6
Grp5
Grp4
Grp3
Grp2
Grp1



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