To o l St i c k - C a p To u c h S e n s e D C
12
Rev. 0.3
10. Capacitive Touch Sense Switches
The capacitive touch sensitive switches on the CapTouchSenseDC are implemented as relaxation oscillators, with
the PCB trace forming the touch-sensitive capacitive element. The relaxation oscillator is constructed using the on-
chip analog comparator, on-chip resistors in the C8051F931 MCU. The on-chip analog multiplexer allows multiple
switches to be operated using one comparator.
11. Information Locations
Example source code is installed by default in the “C:\
SiLabs\MCU\ToolStick\CapTouchSenseDC\Firmware
”
directory during the ToolStick installation.
Documentation for the ToolStick kit, including this User’s Guide, can be found by default in the
C:\SiLabs\MCU\ToolStick\Documentation
and the
C:\SiLabs\MCU\ToolStick\CapTouchSenseDC\Documentation
directories.
The installer for the ToolStick software is available at
.
All application notes are available at
http://www.silabs.com/products/microcontroller/applications.asp.
