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AT42QT1110-AU Datasheet(PDF) 12 Page - ATMEL Corporation

Part # AT42QT1110-AU
Description  11-key QTouch Touch Sensor IC
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT42QT1110-AU Datasheet(HTML) 12 Page - ATMEL Corporation

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AT42QT1110-MU / AT42QT1110-AU [DATASHEET]
9520J–AT42–05/2013
When the Send Setups command is received, the QT1110 stops measurement of QTouch sensors and waits for 42
bytes of data to be sent. Only when all 42 bytes have been received (and the CRC byte, if CRC is enabled), the
QT1110 applies all the settings to RAM and resumes measurement. In this case, if CRC is enabled, the CRC byte is
calculated for all the data sent by the host, including the command byte 0x01.
Control Commands are specified in detail in Section 5. on page 22.
4.1.5
Report Requests
Report Requests are sent by the Host to instruct the QT1110 to return status information. The host sends the
appropriate Report Request command, then transmits Null bytes on MOSI while the QT1110 returns the report data
on MISO.
Figure 4-3.
All Keys Report – CRC Disabled
Host (Sends on MOSI)
Command: 0xC1
Device (Responds on MISO)
Null: 0x00
Key Status Report Byte 0
Null: 0x00
Key Status Report Byte 1
Simultaneous
Transmission
Response: 0x55 ( Idle”
Fresh Command)


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