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QST108 Datasheet(PDF) 19 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) 19 Page - STMicroelectronics

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QST108
Device operating modes
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CALIBRATE_KEY (Single key)
Write
0x9B KeyID Checksum
Forces the recalibration of a single key.
KeyId: Binary-coded key number (see Table 14)
ErrCode: Standard Error code (see Table 11)
Read
ErrCode
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
0x03 AllKeyState
KeyError Checksum
GET_DEBUG_INFO
Write
0xF4 Checksum
Returns the debug info of all keys.
KeyDbgState: Current Key Debug state (see Table 18)
RefMSB: Reference Count MSB
RefLSB: Reference Count LSB
BCMSB: Burst Count MSB
BCLSB: Burst Count LSB
Read
0x0D KeyDbgState1
RefMSB1 RefLSB1
BCMSB1 BCLSB1 ...
RefMSB8 RefLSB8
BCMSB8 BCLSB8
Checksum
SET_KEY_ACTIVATION
Write
0x97 KeyActivation
Checksum
Enables or disables a single key.
KeyActivation: Byte containing the key number selection and
requested state.
ErrCode: Standard Error code (see Table 11)
Read
ErrCode
SET_MAX_ON_DURATION
Write
0x8A MaxOnDuration
Checksum
Sets the maximum detected ON time before triggering an
automatic recalibration.
MaxOnDuration: Time, in second (0 for infinite)
ErrCode: Standard Error code (see Table 11)
Read
ErrCode
SET_LOW_POWER_MODE
Write
0x92 LowPowerMode
Checksum
Selects standard or Low Power mode.
LowPowerMode: Configure Low Power mode (see Table 15)
ErrCode: Standard Error code (see Table 11)
Read
ErrCode
SET_GPIO_STATE
Write
0x9E GPOState
Checksum
Controls the state of the general-purpose outputs.
GPOState: State of general-purpose outputs
ErrCode: Standard Error code (see Table 11)
Read
ErrCode
Table 10.
Supported commands (continued)
I2C commands
Description



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