AT42QT1111-MU Atmel, AT42QT1111-MU Datasheet - Page 22

• 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. Control Commands
5.1
5.2
5.3
22
Introduction
Send Setups (0x01)
Calibrate All (0x03)
AT42QT1111-MU/AT42QT1111-AU
The QT1111 control commands are those commands that affect the device operation.
The control commands are listed in
sections.
Table 5-1.
Note:
This command initiates the upload of the full settings table to the QT1111 (see
page
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.
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.
Command
Send Setups
Calibrate All
Reset
Sleep
Store to EEPROM
Restore from EEPROM
Erase EEPROM
Recover EEPROM
Calibrate Key 'k'
28).
Commands are implemented immediately upon reception, so a suitable delay is
required for the operation to be completed before communications can be
re-established.
Control Commands
Code
0x0C
0x0D
0x01
0x03
0x04
0x05
0x0A
0x0B
0x1k
Table 5-1
Erases EEPROM setups
Note
Configures the device to receive setup data
Calibrates all keys
Resets the device
Sleep (dead) mode
Stores RAM setups to EEPROM
Copies EEPROM setups to RAM (automatically done at
startup)
Restores last EEPROM settings (after erase)
Calibrates one key (key k)
and are described individually in the following
9571A–AT42–02/10
Section 7 on