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SX8661Z датащи(PDF) 31 Page - Semtech Corporation

номер детали SX8661Z
подробное описание детали  Low Power, Capacitive Button Touch and Proximity Controller with LED Drivers and Analog Output
PDF  87 Pages
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производитель  SEMTECH [Semtech Corporation]
домашняя страница  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SX8661Z датащи(HTML) 31 Page - Semtech Corporation

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ADVANCED COMMUNICATIONS & SENSING
DATASHEET
Revision v4.0, February 2016
© 2012 Semtech Corp.
www.semtech.com
31
SX8661Z
Low Power, Capacitive Button Touch and Proximity Controller
(8 sensors) with LED Drivers and Analog Output
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 33 and Figure 34).
intensity OFF
intensity ON
fading steps
dec. time
trigger
time
time
intensity OFF
intensity ON
fading steps
(b)
trigger
off delay
dec. time
off delay
Figure 33
GPO OFF transition (LED fade out), normal polarity, (a) linear, (b) logarithmic
time
intensity OFF
intensity ON
fading steps
dec. time
(a)
trigger
time
intensity OFF
intensity ON
fading steps
dec. time
(b)
trigger
off delay
off delay
Figure 34
GPO OFF transition (LED fade out), inverted polarity, (a) linear, (b) logarithmic
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.
3.17.3 GPO Fading
The SX8661Z 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 35



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