AT42QT1110-MU(2010) データシートの表示（PDF） - Atmel Corporation
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AT42QT1110-MU Datasheet PDF : 48 Pages
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5. Control Commands
5.1 Introduction
The QT1110 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.
Table 5-1. Control Commands
Command
Code
Send Setups
0x01
Calibrate All
0x03
Reset
0x04
Sleep
0x05
Store to EEPROM
0x0A
Restore from EEPROM
0x0B
Erase EEPROM
Recover EEPROM
Calibrate Key 'k'
0x0C
0x0D
0x1k
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)
Erases EEPROM setups
Restores last EEPROM settings (after erase)
Calibrates one key (key k)
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 QT1110 (see Section 7 on
page 28).
When this command is received, the QT1110 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 QT1110, and confirms that the data correctly matches the data sent.
The host must wait for at least 150 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 150 µs for the operation to be completed before communications
can be re-established.
22 AT42QT1110-MU/AT42QT1110-AU
9520I–AT42–03/10
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