sx8639 Semtech Corporation, sx8639 Datasheet - Page 46

• Manufacturer Part Number: sx8639
• Description: Low Power, Capacitive Button And Wheel Touch Controller 8 Sensors With Enhanced Led Drivers And Proximity Sensing
• Manufacturer: Semtech Corporation

ADVANCED COMMUNICATIONS & SENSING
CapThresh0, CapThresh1, CapThresh2, CapThresh3, CapThresh4, CapThresh5, CapThresh6, CapThresh7:
CapPerComp:
Revision 7_8, September 10
For each CAP pin a threshold level can be set individually.
The threshold levels are used by the SX8639 for making touch and release decisions on e.g. touch or no-
touch.
The details are explained in the sections for buttons and wheel.
The SX8639 offers a periodic offset compensation for applications which are subject to substantial
environmental changes. The periodic offset compensation is done at a defined interval and only if wheel and
buttons are released.
(8 sensors) with Enhanced LED Drivers and Proximity Sensing
© 2010 Semtech Corp.
Low Power, Capacitive Button and Wheel Touch Controller
46
DATASHEET
www.semtech.com
SX8639