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Application Note
www.vishay.com
Vishay Semiconductors
VCNL4000, VCNL4010, and VCNL4020 Demo Kit
Screen shot 8 shows how the upper threshold is
reprogrammed to be high enough so that it will not ‘be in
play’ anymore, for example 65 535 counts. To be able to
show it in the lower window, the value has been set to 5600
for this example. The application needs to now initiate an
action when the object is no longer present. In a smart
phone application for example, the screen backlight and
touch function is turned off when the phone is brought to the
the phone is removed from being near the user's ear (lower
threshold). The lower threshold should be above the offset
counts but below the present proximity counts. In this
example, the lower threshold is set to 5450 counts. Screen
shot 8 also shows that the object is removed and the signal
goes below the lower threshold. The “Interrupt Low
Thresold” indicator in the lower left corner is illuminated
(red).
users ear (upper threshold) and should turn back on when
Screen Shot 8
Revision: 12-Mar-12
11
Document Number: 83395
For technical questions, contact: sensorstechsupport@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
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