SX8661 datasheet(33/88 Pages) SEMTECH

номер детали	SX8661

подробное описание детали	Low Power, Capacitive Button Touch and Proximity Controller

PDF	88 Pages

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производитель	SEMTECH [Semtech Corporation]

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ADVANCED COMMUNICATIONS & SENSING

DATASHEET

Revision v3.2, January 2011

www.semtech.com

SX8661

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 35 and Figure 36).

Figure 35

GPO OFF transition (LED fade out), normal polarity, (a) linear, (b) logarithmic

Figure 36

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.

3.18.3 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

SX8661 датащи(PDF) 33 Page - Semtech Corporation