AT42QT1111-MU Atmel, AT42QT1111-MU Datasheet - Page 23

• Manufacturer Part Number: AT42QT1111-MU
• Description: IC TOUCH SENSOR 11KEY QFN
• Manufacturer: Atmel
• Series: QTouch™r
• Type: Capacitiver

Specifications of AT42QT1111-MU

• Touch Panel Interface: 10, 2-Wire
• Number Of Inputs/keys: 11 Key
• Data Interface: Serial, SPI™
• Voltage Reference: Internal
• Voltage - Supply: 3 V ~ 5.5 V
• Current - Supply: 12mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-VFQFN Exposed Pad
• Output Type: Logic
• Interface: SPI
• Input Type: Logic
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: AT42QT1111-MU; AT42QT1111-MUTR

5.4
5.5
5.6
5.7
5.8
5.9
5.10
9571A–AT42–02/10
Reset (0x04)
Sleep (0x05)
Store to EEPROM (0x0A)
Restore from EEPROM (0x0B)
Erase EEPROM (0x0C)
Recover EEPROM (0x0D)
Calibrate Key (0x1k)
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.
The Sleep command puts the device into sleep mode (see
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.
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.
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.
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.
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:
The host must wait for at least 50 ms for the operation to be completed before communications
can be re-established.
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.
If valid settings have not previously been stored in the device EEPROM, the QT1111
continues to operate under the default settings.
AT42QT1111-MU/AT42QT1111-AU
Section 4.3 on page
17).
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