SX8635I05AWLTRT SEMTECH [Semtech Corporation], SX8635I05AWLTRT Datasheet - Page 44
SX8635I05AWLTRT
Manufacturer Part Number
SX8635I05AWLTRT
Description
Low Power, Capacitive Button and Wheel Touch Controller with Enhanced LED
Manufacturer
SEMTECH [Semtech Corporation]
Datasheet
1.SX8635I05AWLTRT.pdf
(81 pages)
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ADVANCED COMMUNICATIONS & SENSING
Revision 7_8, October 10
Buttons and disabled CAP pins can be attributed freely (examples in Figure 46). All buttons can be used for
touch or proximity sensing, in the latter case register CapProxEnable needs to be set accordingly.
Disabled CAP pins inside the wheel sensor attribution sequence are allowed, but CAP buttons inside a wheel
are not allowed (see example Figure 47 with CAP3 in a correct and a not allowed configuration).
The physical order of the wheel sensors on the PCB should correspond to the incremental CAP pin numbers.
Crossing wheel 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 Wheel good/bad configuration examples (I)
(12 sensors) with Enhanced LED Drivers and Proximity Sensing
Figure 46
© 2010 Semtech Corp.
Low Power, Capacitive Button and Wheel Touch Controller
Button examples
44
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