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SX8661Z датащи(PDF) 31 Page - Semtech Corporation |
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SX8661Z датащи(HTML) 31 Page - Semtech Corporation |
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31 / 87 page ![]() 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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