SX8661I07AULTRT Semtech, SX8661I07AULTRT Datasheet - Page 33
SX8661I07AULTRT
Manufacturer Part Number
SX8661I07AULTRT
Description
IC, Capacitive Button Touch And Proximity Controller, 8 SENSOR, MLPQ-28
Manufacturer
Semtech
Datasheet
1.SX8661I07AULTRT.pdf
(88 pages)
Specifications of SX8661I07AULTRT
Controller Type
Capacitive Touch Screen
Ic Interface Type
I2C
Supply Voltage Range
2.7V To 3.6V
Operating Temperature Range
-40°C To +85°C
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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
The fading out (e.g. after a button is released) is identical to the fading in but an additional off delay can be added
before the fading starts (Figure 35 and Figure 36).
GPO OFF transition (LED fade out), normal polarity, (a) linear, (b) logarithmic
Figure 35
GPO OFF transition (LED fade out), inverted polarity, (a) linear, (b) logarithmic
Figure 36
Please note that standard high/low logic signals are just a specific case of GPO mode and can also be generated
simply by setting inc/dec time to 0 (i.e. OFF) and programming intensity OFF/ON to 0x00 and 0xFF.
3.18.3 GPO Fading
The SX8661 supports two different fading modes, namely Single and Continuous. These fading modes can be
configured for each GPIO individually. Please see 5.9 “GPIO Parameters” for more information on how to
configure this feature.
i) Single Fading Mode:
The GPO pin fades in when the associated button is touched and it fades out when it is released. This is shown in
Figure 37
Revision v3.2, January 2011
© 2011 Semtech Corp.
www.semtech.com
33
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