sx8644 Semtech Corporation, sx8644 Datasheet - Page 44

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

ADVANCED COMMUNICATIONS & SENSING
Revision 7_3, January 10
Buttons and disabled CAP pins can be attributed freely (examples in Figure 46).
Disabled CAP pins inside the slider sensor attribution sequence are allowed, but CAP buttons inside a slider
are not allowed (see example Figure 47 with CAP3 in a correct and a not allowed configuration).
The physical order of the slider sensors on the PCB should correspond to the incremental CAP pin numbers.
Crossing slider PCB sensors and CAP number is not allowed. Figure 48 shows a valid configuration and a
wrong configuration where CAP5 andCAP6 are not routed correctly on the PCB.
Figure 47
Button and Slider good/bad configuration examples (I)
Touch Controller (12 sensors) with Enhanced LED Drivers
Figure 46
© 2009 Semtech Corp.
Button examples
44
Ultra Low Power, Capacitive Button and Slider
DATASHEET
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SX8644