Cypress CY3280 SmartSense CapSense User manual

CY3280-SMARTSENSE CAPSENSE AUTO-TUNING KIT
QUICK START GUIDE
Install Software
1. Download and install the CY3280 -
SmartSense CapSense Auto-Tuning Kit
installer package from
http://www.cypress.com/go/
CY3280-SmartSense.
Power CY3280-SmartSense Kit
1. Insert battery in the battery holder.
2. Keep the kit on a stable surface and
touch the power button
3. Ensure power LED turns on.
Touch Buttons
1. Touch any button; the respective LED
turns on.
2. Touch more than one button
simultaneously and observe that all
touches are registered separately.
Note: A SmartSense example project is
programmed with the kit, which implements
LED toggle function when the associated
button is touched.
Evaluate SmartSense Autotuning
1. Increase parasitic capacitance of BTN2
by connecting external capacitor to J5
with mark facing up.
2. Touch the power button twice to toggle
the power to the kit; then test BTN2.
3. BTN2 works up to 45 pF of parasitic
capacitance.
Note: See the user guide for more details.
1
2
3
4

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CY3280-SMARTSENSE CAPSENSE AUTO-TUNING KIT
QUICK START GUIDE
Connector Details
Conn J5:
Pin 1 – VDD
Pin 2 – GND
Pin 3 – XRES
Pin 4 – Button Sensor BTN1
Pin 5 – Button Sensor BTN2
Notes
- It is not recommended to connect power
to J5 connector, when kit is powered
from J2 connector or battery.
- BTN1 and BTN2 are connected to pin
4 and 5 of J5 connector for SmartSense
evaluation; touching those pins may
create false trigger.
- Connector J5 is used to program the
CapSense controller as well as
implement CapSense sensors; this is not
recomended in a design.
Conn J1:
Pin 1 – P0[4]
Pin 2 – XRES
Pin 3 – P1[5]
Pin 4 – P1[7]
Pin 5, 6 – GND
Pin 7 – P2[3] (LED0)
Pin 8 – P2[5] (LED1)
Pin 9 – P0[1] (LED2)
Pin 10 – P0[7] (LED3)
Conn J2:
Pin 33 – P1[2]
Pin 34 – NC
Pin 35, 36 – GND
Pin 37, 38 – NC
Pin 39, 40 – GND
Pin 41 – VDD_Ext
Pin 42 – NC
Notes
- Demo CapSense controller powers 200 mV lesser than the power
connected to J2 due to the 200 mV dropout across the series pass
switch in the power section. Minimum recommended supply voltage
through J2 connector is 2 V.
- If the kit is powered through J2, operating voltage will be less than
external supply voltage.