sx8661 Semtech Corporation, sx8661 Datasheet - Page 13
sx8661
Manufacturer Part Number
sx8661
Description
Low Power, Capacitive Button Touch And Proximity Controller 8 Sensors With Led Drivers And Analog Output
Manufacturer
Semtech Corporation
Datasheet
1.SX8661.pdf
(88 pages)
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SX8661
Low Power, Capacitive Button Touch and Proximity Controller
(8 sensors) with LED Drivers and Analog Output
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
Quickstart LED and AOI reporting
Figure 7
Figure 7 shows the reporting on the LEDs and the AOI for the quickstart application.
The LEDs operate in triple reporting mode. In triple reporting mode the LEDs have three light intensities.
- OFF: out of proximity, no touch,
- Proximity: proximity detected,
- ON: button touched.
In case no fingers/hand is detected (out of proximity) all LEDs will be OFF and the AOI indicates the idle level.
In case a finger/hand is approaching proximity is detected and all LEDs will light up to 50% of the maximum
intensity. The AOI goes to the proximity voltage level (in the quickstart application the proximity level is chosen
identical to the idle level).
In case a button is touched the corresponding LED will go to 100% of intensity and the AOI voltage level indicates
the button that is touched.
Revision v3.2, January 2011
© 2011 Semtech Corp.
www.semtech.com
13
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