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QST108 데이터시트(PDF) 22 Page - STMicroelectronics

부품명 QST108
상세설명  Capacitive touch sensor device 8 keys with individual key state outputs or I2C interface
PDF  38 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

QST108 데이터시트(HTML) 22 Page - STMicroelectronics

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Device operating modes
QST108
22/38
Low power mode description
Free Run in Detect (Bit 6)
1: Low power mode is suspended when detection is on-going.
0: Low power mode is authorized.
Sleep Duration Factor (Bits 5 to 0)
This value is between 1 and 62, in hexadecimal format. The Sleep duration is ‘Sleep
Duration Factor’ x 20 milliseconds.
0x00: Low power mode is disabled.
0x3F: Sleep is entered immediately with an infinite duration (deep sleep).
Note:
1
When the device is in sleep, any I2C bus activity will wake up the device. If many ‘sleeping’
devices share the same bus, then any bus activity will wake up all of them.
2
The command sent to wake up the device is always lost (not acknowledged). The Master
device will have to repeat this command.
AKS group mode description
AKSGrpnMode
Defines the type of AKS for the Group n:
0: Locking AKS
1: Unlocking AKS
AKS group selection description
Grpx
The selected key is a member of AKS Group x.
Table 15.
SetLowPower
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
Free Run
in Detect
Sleep Duration Factor
Table 16.
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 17.
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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