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AT42QT2100 Datasheet(PDF) 8 Page - ATMEL Corporation

Part # AT42QT2100
Description  QTouch Touch Sensor IC
Download  44 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT42QT2100 Datasheet(HTML) 8 Page - ATMEL Corporation

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AT42QT2100 [DATASHEET]
9554E–AT42–01/13
2.8
Operating Modes
The device features a number of operating modes to set the current drain and speed of response.
The available operating modes are:
Free Run Mode
This mode uses a continuous stream of acquire bursts. Free Run mode has, in consequence, the highest
power drain of all the QT2100 operating modes but the fastest response time.
LP Mode
In LP (low power) modes, the QT2100 spends a portion of the time sleeping to conserve power; it wakes
itself periodically to perform acquire bursts, then normally goes back to sleep again. The QT2100 provides
a choice of intervals between acquire bursts to allow an appropriate trade-off between speed and power to
be made for each product.
Sleep Mode
In Sleep mode, the QT2100 shuts down to conserve power; it remains in this mode, carrying out no
acquisition bursts until the host wakes it using the SS pin.
Sync Mode
In this mode the device synchronizes to the host in a way that allows for the suppression of heavy low
frequency noise; for example, from mains frequencies and their harmonics.


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