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SX8663 bảng dữ liệu(PDF) 26 Page - Semtech Corporation

tên linh kiện SX8663
Giải thích chi tiết về linh kiện  Capacitive Button Matrix (up to 36) and Proximity Controller with Individual LED Drivers and Buzzer Output
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nhà sản xuất  SEMTECH [Semtech Corporation]
Trang chủ  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

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ADVANCED COMMUNICATIONS & SENSING
Rev5 4
th August 2011
© 2011 Semtech Corp.
www.semtech.com
26
SX8663
Capacitive Button Matrix (up to 36) and Proximity Controller
with Individual LED Drivers and Buzzer Output
Figure 28
GPO OFF transition (LED fade out), normal polarity, (a) linear, (b) logarithmic
Figure 29
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.
3.15.2 Fading Modes
The SX8663 supports two different fading modes, namely Single and Continuous. These fading modes can be
configured for each GPIO individually. Please see 5.7 “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 30
fading-in
OFF intensity
ON intensity
delay_off
fading-out
OFF intensity
ON
OFF
OFF
Figure 30
Single Fading Mode
ii) Continuous Fading Mode:



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