SX8643I05AWLTRT Semtech, SX8643I05AWLTRT Datasheet - Page 13
SX8643I05AWLTRT
Manufacturer Part Number
SX8643I05AWLTRT
Description
12-ch Capacitive Touch Solution (Button)
Manufacturer
Semtech
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SX8643
Ultra Low Power, Capacitive Button Touch Controller
(12 sensors) with Enhanced LED Drivers
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
To leave Doze mode and enter Active mode this can be done by a simple touch on any button.
For some applications a single button touch might cause undesired wakening up and Active mode would be
entered too often.
The SX8643 offers therefore a smart wake-up sequence feature in which the user needs to touch and release a
correct sequence of buttons before Active mode will be entered. This is explained in more detail in the Wake-Up
Sequence section.
The host can decide to force the operating mode by issuing commands over the I2C (using register
CompOpMode) and take fully control of the SX8643.
The diagram in Figure 8 shows the available operation modes and the possible transitions.
Operation modes
Figure 8
Revision 7_5, February 10
© 2010 Semtech Corp.
www.semtech.com
13
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