QST104 STMicroelectronics, QST104 Datasheet - Page 21

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

QST104
Note:
1
2
3
4
Table 10.
See
The value is a signed character (0x80...0x7F <=> -128 ... +128).
The value is an unsigned number (0x00..0xFF <=> 0 ... 255).
Enabling or disabling keys triggers a new calibration of all enabled keys.
SET_KEY_ACTIVATION (see Note 4)
Write
Read
SET_KEY_GROUP
Write
Read
SET_LOW_POWER_MODE
Write
Read
SET_MAX_ON_DURATION
Write
Read
SET_SCKEY_PARAMETERS
Write
Read
Section 6.5: Capacitive sensing characteristics on page 33
I
2
0x97 KeyActivation
Checksum
ErrCode
0x00 0x09
AKSGrpMode Key1Grp
Key2Grp ...Key8Grp
CheckSum
ErrCode
0x92 LowPowerMode
Checksum
ErrCode
0x8A MaxOnDuration
Checksum
ErrCode
0x01 0x04 0x00 DeTh
EofDeTh PosRecalTh
Checksum
ErrCode
C commands
Supported commands (continued)
Enables or disables a single key.
Defines the AKS groups for each key.
Selects standard or Low Power mode.
Sets the maximum detected ON time before triggering an
automatic recalibration.
Sets the Detection, End Of Detection and Positive
Recalibration Thresholds for a single key.
KeyActivation: Byte containing the key number selection and
requested state.
ErrCode: Standard Error code (see
AKSGrpMode: AKS mode selection of each group (see
Table
KeynGrp: AKS group selection for key n (see
ErrCode: Standard Error code (see
LowPowerMode: Configure Low Power mode (see
ErrCode: Standard Error code (see
MaxOnDuration: Time, in second (0 for infinite)
ErrCode: Standard Error code (see
DeTh: Detection Threshold
EofDeTh: End of Detection Threshold
PosRecalTh: Positive Recalibration Threshold
ErrCode: Standard Error code (see
17)
Description
1) 2)
for default values.
Device operating modes
Table
Table
Table
Table
Table
1) 2)
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