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AT42QT1110-AU Datasheet(PDF) 12 Page - ATMEL Corporation |
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AT42QT1110-AU Datasheet(HTML) 12 Page - ATMEL Corporation |
12 / 50 page ![]() 12 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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