AT42QT1110-AZ Ver la hoja de datos (PDF) - Atmel Corporation

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AT42QT1110-AZ

11-key QTouch® Touch Sensor IC

Atmel Corporation 

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

Send Setups

Calibrate All

Reset

Code

0x01

0x03

0x04

Note

Configures the device to receive setup data

Calibrates all keys

Resets the device

Sleep

Store to EEPROM

Restore from EEPROM

Erase EEPROM

0x05

0x0A

0x0B

0x0C

Sleep (dead) mode

Stores RAM setups to EEPROM

Copies EEPROM setups to RAM (automatically done at startup)

Erases EEPROM setups

Recover EEPROM

Calibrate Key k

0x0D

0x1k

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 29).

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.

AT42QT1110-MZ / AT42QT1110-AZ [DATASHEET] 22

9570J–AT42–05/2013

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