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IQS211 Datasheet(PDF) 5 Page - List of Unclassifed Manufacturers |
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IQS211 Datasheet(HTML) 5 Page - List of Unclassifed Manufacturers |
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5 / 33 page  ProxSense ® Series Copyright © Azoteq 2015 IQS211 Datasheet v1.3 Page 5 of 33 All Rights Reserved Check for latest datasheet November 2015 MOVEMENT & INPUT UI Figure 1.8 Device charging example of input UI Device is operating on battery with designed sensitivity Device is plugged-in for charging Device ground reference changes and sensitivity increases Input is given to reduce sensitivity PROX & TOUCH UI Figure 1.9 Proximity and touch state diagram Figure 1.10 Proximity and touch UI example Proximity to the device activates proximity output Touching the device activates the touch output (proximity remains triggered) Movement features are integrated and function the same as in the default “ACTIVATION & MOVEMENT” user interface 1.1.5 Integrated features The device includes an internal voltage regulator and reference capacitor (Cs). Various advanced signal processing techniques are combined for creating a robust solution. These techniques include: Movement detection filter (to release an activation in the case of inactivity) Advanced noise filtering on incoming sample stream Superior methods of parasitic capacitance compensation while preserving sensitivity Unique option for capacitive load dependant activation on power-on 1.1.6 Communications protocols The IQS211 offers a wide range of data streaming modes each with a specific purpose. Standard 2-wire I 2C polling is offered to access the entire range of settings and data offered by the IQS211. Another I 2C option allows the device to be configured via I 2C then jump to any of the other modes when the communication window is closed. This option is offered to give full control over selecting settings while simplifying the main-loop code by only responding to direct digital outputs. The digital output pair will contain signature pulses to indicate power-on reset or an unexpected reset occurrence. I 2C configuration should be re-initiated in the event of an IQS211 reset. A 1-wire data streaming interface is offered for access to a variety of data over a single line. The 1-wire implementation may be enhanced (by using the IO2 pin) by only reading data when the IO2 clock pin toggles. The clock pin will only toggle when an event is active and produce a clock signal during this active period. Input = Reduce Sensitivity Normal Sensitivity Increase Sensitivity Normal Capacitive sensing pad Detection field NO ACTIVATION PROXIMITY ACTIVATION TOUCH ACTIVATION Proximity Proximity release No movement for x-seconds (recalibrate) Touch Touch release No movement for x-seconds (recalibrate) Proximity area Touch area Capacitive sensing pad |
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