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AT42QT1111-AU Datasheet(PDF) 21 Page - ATMEL Corporation |
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AT42QT1111-AU Datasheet(HTML) 21 Page - ATMEL Corporation |
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21 / 50 page  21 AT42QT1111-MU / AT42QT1111-AU [DATASHEET] 9571C–AT42–05/2013 5. Control Commands 5.1 Introduction The QT1111 control commands are those commands that affect the device operation. The control commands are listed in Table 5-1 and are described individually in the following sections. Note: Commands are implemented immediately upon reception, so a suitable delay is required for the operation to be completed before communications can be re-established. 5.2 Send Setups (0x01) This command initiates the upload of the full settings table to the QT1111 (see Section 7. on page 27). When this command is received, the QT1111 stops key measurement and waits until 42 bytes of setup data have been received. Key acquisition will restart after all the setup data has been received. If enabled, a CRC check byte is transmitted (both ways) after the 42 bytes to confirm that they have been received correctly. If CRC checking is not enabled, it is recommended that the host request a dump of setup data from the QT1111, and confirms that the data correctly matches the data sent. The host must wait for at least 300 µs for the operation to be completed before communications can be re-established. 5.3 Calibrate All (0x03) This command initiates the recalibration of all sensor keys. The host must wait for at least 300 µs for the operation to be completed before communications can be re-established. 5.4 Reset (0x04) The Reset command forces the QT1111 to reset. If the setups data is present in the EEPROM, the setups are loaded into the device. Otherwise default settings are applied. Table 5-1. Control Commands Command Code Note Send Setups 0x01 Configures the device to receive setup data Calibrate All 0x03 Calibrates all keys Reset 0x04 Resets the device Sleep 0x05 Sleep (dead) mode Store to EEPROM 0x0A Stores RAM setups to EEPROM Restore from EEPROM 0x0B Copies EEPROM setups to RAM (automatically done at startup) Erase EEPROM 0x0C Erases EEPROM setups Recover EEPROM 0x0D Restores last EEPROM settings (after erase) Calibrate Key k 0x1k Calibrates one key (key k) |
Similar Part No. - AT42QT1111-AU_14 |
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Similar Description - AT42QT1111-AU_14 |
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