SX8644EVK Semtech, SX8644EVK Datasheet - Page 28

Manufacturer Part Number

SX8644EVK

Description

Manufacturer

Semtech

Datasheet

1.SX8644EVK.pdf (76 pages)

Lead Free Status / RoHS Status

Not Compliant

SX8644

Ultra Low Power, Capacitive Button and Slider

Touch Controller (12 sensors) with Enhanced LED Drivers

ADVANCED COMMUNICATIONS & SENSING

DATASHEET

GPO ON transition (LED fade in), inverted polarity, (a) linear, (b) logarithmic

Figure 32

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).

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

Figure 33

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

Figure 34

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 (ie OFF) and programming intensity OFF/ON to 0x00 and 0xFF.

Revision 7_3, January 10