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AT42QT1111-MU Datasheet(PDF) 23 Page - ATMEL Corporation |
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AT42QT1111-MU Datasheet(HTML) 23 Page - ATMEL Corporation |
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23 / 50 page  23 9571A–AT42–02/10 AT42QT1111-MU/AT42QT1111-AU 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. The host must wait for at least 160 ms for the operation to be completed before communications can be re-established. 5.5 Sleep (0x05) The Sleep command puts the device into sleep mode (see Section 4.3 on page 17). The host must wait for at least 300 µs after a low signal is applied to the SS or CHANGE pin to wake the device before communications can be re-established. 5.6 Store to EEPROM (0x0A) Stores the current RAM contents to the QT1111’s internal EEPROM. When the device is reset, it will automatically reload these settings. The host must wait for at least 200 ms for the operation to be completed before communications can be re-established. 5.7 Restore from EEPROM (0x0B) Settings stored in EEPROM are automatically loaded into RAM when the device is reset. If desired, these settings can be re-loaded into RAM using the ‘Restore from EEPROM’ command. The host must wait for at least 150 ms for the operation to be completed before communications can be re-established. 5.8 Erase EEPROM (0x0C) This command erases the settings stored in EEPROM and then resets the QT1111. This causes the QT1111 to revert to its default settings. The host must wait for at least 50 ms for the operation to be completed before communications can be re-established. 5.9 Recover EEPROM (0x0D) This command “undeletes” the setup data that was previously stored in the device’s EEPROM and has been erased using the “Erase EEPROM” command. Note: If valid settings have not previously been stored in the device EEPROM, the QT1111 continues to operate under the default settings. The host must wait for at least 50 ms for the operation to be completed before communications can be re-established. 5.10 Calibrate Key (0x1k) This command recalibrates the key specified by “k”. For example, to calibrate key 4, the host sends “0x14”; to calibrate key 10, the host sends “0x1A”. The host must wait for at least 300 µs for the operation to be completed before communications can be re-established. |
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