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AT42QT2100 Datasheet(PDF) 27 Page - ATMEL Corporation

Part # AT42QT2100
Description  QTouch Touch Sensor IC
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT42QT2100 Datasheet(HTML) 27 Page - ATMEL Corporation

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AT42QT2100 [DATASHEET]
9554E–AT42–01/13
Byte 2
Always set to 0.
5.4.3
QT2100 Data
During this exchange, the QT2100 returns the data requested on the previous exchange (Normal Data by default),
and at the next exchange the requested debug data is returned.
Byte 0
State of Channel: Indicates the current state of the channel.
Byte 1
LSB Delta/LSB Reference: The least significant 8 bits (LSB) of the Reference/Delta signal.
Byte 2
MSB Delta/MSB Reference: The most significant 8 bits (MSB) of the Reference/Delta signal.
7
Slider/Wheel A1
8
Slider/Wheel A2
9
Slider/Wheel A3
Table 5-10. Channel Mappings (Continued)
Channel
Sensing Object
Table 5-11.
Send Debug Data Command Mode – Return Bytes
QT2100
Byte
Bit
7
6
5
4
3
2
1
0
0
State of Channel
1
LSB Delta/LSB Reference
2
MSB Delta/MSB Reference
Table 5-12. Sensor States
State Code
Sensor State
0x01
Calibration
0x02
No Detect (no touch)
0x04
Filter In (to confirm touch)
0x08
Detect (touched)
0x10
Filter out (to confirm release)
0x20
Recal (positive error recalibration)
0x40
Fault Check


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