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QST108 Datenblatt(PDF) 22 Page - STMicroelectronics

Teilenummer QST108
Bauteilbeschribung  Capacitive touch sensor device 8 keys with individual key state outputs or I2C interface
PDF  51 Pages
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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

QST108 Datenblatt(HTML) 22 Page - STMicroelectronics

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Device operating modes
QST108
22/51
GET_DEVICE_INFO
Write
0x85
Returns the QST108 device version and ASCII-coded device
name. This command must be sent first to enable the
communication flow.
MainVers: Device main version
SubVer: Device sub-version
NbSCkey: 0x08 single-channel keys
NbMCkey: 0x00 multi-channel keys
Q S T 1 0 8: ASCII-coded device name
Read
0x15 MainVers SubVers
NbSCkey NbMCkey
‘Q’ ’S’ ‘T’ ‘1’ ‘0’ ‘8’
Checksum
GET_KEY_ERROR
Write
0xC4
Returns the error information on each key.
KeyErrorN: KeyError byte description (see Table 12)
Read
0x10 KeyError1
KeyError2 ... KeyError8
CheckSum
GET_KEY_STATE
Write
0xC1
Returns the state of all keys.
AllKeyState: Touched/untouched state for all 8 keys. Refer to
Table 13: AllKeyState.
KeyError: Refer to Table 12: KeyError byte description
Read
0x04 AllKeyState
KeyError Checksum
GET_PROTOCOL_VERSION
Write
0x80
Returns the QST108 protocol version.
MainVers: Protocol main version
SubVer: Protocol sub-version
I2CSpeed: 0x00 (100 kHz maximum)
Read
0x07 MainVers SubVer
I2CSpeed Checksum
RESET_DEVICE
Write
0xFD
Restarts the device (options Read and Calibration) after
reading the ErrCode (see Table 11).
Read
ErrCode
SET_DETECT_INTEGRATORS
Write
0x03 0x04 0x00 DI EDI
PosRecaII CheckSum
Sets the detection, End Of Detection and Positive Recalibration
Integrators for all keys.
DI: Detection Integrator 1) 3)
EDI: End of Detection Integrator 1) 3)
PosRecaII: Positive Recalibration Integrator 1) 3)
ErrCode: Standard Error code (see Table 11)
Read
ErrCode
SET_GPIO_STATE
Write
0x08 0x01 GPOState
Checksum
Controls the state of the general-purpose outputs.
GPOState: State of general-purpose outputs (see Table 16)
ErrCode: Standard Error code (see Table 11)
Read
ErrCode
Table 10.
Supported commands (continued)
I2C commands
Description



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