SX8644EVK Semtech, SX8644EVK Datasheet - Page 13

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

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 SX8644 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 SX8644.

The diagram in Figure 8 shows the available operation modes and the possible transitions.

Operation modes

Figure 8

Revision 7_3, January 10