sx8644 Semtech Corporation, sx8644 Datasheet - Page 31

• Manufacturer Part Number: sx8644
• Description: Ultra Low Power, Capacitive Button And Slider Touch Controller 12 Sensors With Enhanced Led Drivers
• Manufacturer: Semtech Corporation

SX8644
Ultra Low Power, Capacitive Button and Slider
Touch Controller (12 sensors) with Enhanced LED Drivers
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
3.17 Smart Wake Up
The SX8644 offers a smart wake up mechanism which allows waking-up from the Doze low power mode to the
Active mode in a secure/controlled way and not by any unintentional sensor activation.
Until the full correct wake-up sequence is entered, the SX8644 will remain in Doze mode. Any wrong key implies
the whole sequence to be entered again.
A sequence of up to 6 keys can be defined. Each key must be followed by a release to be validated.
The smart wake-up mechanism can also be disabled which implies that Doze mode can hence only be exited
from GPI or I2C command.
Revision 7_3, January 10
© 2009 Semtech Corp.
www.semtech.com
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