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QST108 Datasheet(PDF) 20 Page - STMicroelectronics

Part # QST108
Description  Capacitive touch sensor device 8 keys with individual key state outputs or I2C interface
PDF  38 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

QST108 Datasheet(HTML) 20 Page - STMicroelectronics

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Device operating modes
QST108
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Error codes
Table 11 lists the I2C error codes.
SET_SCKEY_PARAMETERS
Write
0x01 0X04 KeyID DeTh
EofDeTh PosRecalTh
Checksum
Sets the Detection, End Of Detection and Positive
Recalibration Thresholds for a single key.
KeyID: 0x00 (settings applied to all keys)
DeTh: Detection Threshold
EofDeTh: End of Detection Threshold
PosRecalTh: Positive Recalibration Threshold
ErrCode: Standard Error code (see Table 11)
Read
ErrCode
SET_KEY_GROUP
Write
0x00 0x09
AKSGrpMode Key1Grp
Key2Grp Key3Grp
Key4Grp Key5Grp
Key6Grp Key7Grp
Key8Grp CheckSum
Defines the AKS groups for each key.
AKSGrpMode: AKS mode selection of each group (see
Table 16)
KeynGrp: AKS group selection for key n (see Table 17)
ErrCode: Standard Error code (see Table 11)
Read
ErrCode
SET_SYSTEM_INTEGRATORS
Write
0x03 0x04 KeyID DI EDI
PosRecaI CheckSum
Sets the detection, End Of Detection and Positive Recalibration
Integrators for all keys.
KeyID: 0x00 (settings applied to all keys)
DI: Detection Integrator
EDI: End of Detection Integrator
PosRecaI: Positive Recalibration Integrator
ErrCode: Standard Error code (see Table 11)
Read
ErrCode
GET_KEY_ERROR
Write
0xC4
Returns the error information on each key.
KeyErrorN: KeyError byte description (see Table 12)
Read
0x11 KeyError1
KeyError2 ... KeyError8
CheckSum
Table 11.
ErrCode
ErrCode
Description
0x01
No Error
0x83
Command not Supported
0x85
Parameter not Supported
0xA1
Parity Error
0xA3
Checksum Error
0xE0
Initialization process
Table 10.
Supported commands (continued)
I2C commands
Description



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