QST608 ST Microelectronics, QST608 Datasheet - Page 18

• Manufacturer Part Number: QST608
• Description: Capacitive touch sensor device
• Manufacturer: ST Microelectronics

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Device operating mode
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Table 4.
GET_KEY_STATE
Write
Read
GET_PROTOCOL_VERSION
Write
Read
RESET_DEVICE
Write
Read
SET_DETECT_INTEGRATORS
Write
Read
SET_DRIFT_COMPENSATION
Write
Read
SET_GPIO_STATE
Write
Read
SET_KEY_ACTIVATION (See
Write
Read
I
2
0x07 AllKeyState
RotPos KeyError
Checksum
0x07 MainVers SubVer
I2CSpeed Checksum
0xFD
ErrCode
0x03 0x04 0x00 DI EDI
PosRecalI CheckSum
ErrCode
0x04 0x05 0x00
PosDriftI NegDriftI
ComFact DifFact
Checksum
ErrCode
0x08 0x01 GPOState
Checksum
ErrCode
0x97 KeyActivation
Checksum
ErrCode
0xC1
0x80
C commands
Supported commands (continued)
Note
4)
Returns the state of all keys.
Returns the QST608 protocol version.
Restarts the device (options Read and Calibration) after
reading the ErrCode (see
Sets the detection, End Of Detection and Positive Recalibration
Integrators for all keys.
Sets the positive and negative common and differential drift
rate for all keys.
Controls the state of the general-purpose outputs.
Enables or disables a single key.
AllKeyState: Touched/untouched state for all 5 keys and
rotor/slider. Refer to
RotPos: Rotor/slider absolute position
KeyError: Refer to
MainVers: Protocol main version
SubVer: Protocol sub-version
I2CSpeed: 0x00 (100 kHz maximum)
DI: Detection Integrator
EDI: End of Detection Integrator
PosRecalI: Positive Recalibration Integrator
ErrCode: Standard Error code (see
PosDriftI: Positive drift integrator
NegDriftI: Negative drift integrator
ComFact: Common time step factor
DifFact: Differential time step factor
ErrCode: Standard Error code (see
GPOState: State of general-purpose outputs (see
ErrCode: Standard Error code (see
KeyActivation: Byte containing the key number selection and
requested state
ErrCode: Standard Error code (see
(seeTable
Table 6: KeyError byte description
Table 7:
Description
Table
1) 3)
8).
AllKeyState.
5).
1) 3)
Table
Table
Table
Table
5)
5)
5)
5)
1) 3)
Table
QST608
10)