Kit Hardware
CY8CKIT-024 CapSense
®
Proximity Shield Kit Guide, Doc. No. 001-92568 Rev. *B
16
2.3.1.2 Proximity Sensors PS3 and PS4
The proximity sensors PS3 and PS4 are provided to detect vertical gestures, such as hand movements, from top to bottom
or from bottom to top.
shows a bottom-to-top hand movement.
A gesture is detected based on the sequence in which these sensors detect the presence of a hand. If PS4 detects the
hand before PS3 does, the hand must be moving from top to bottom. Similarly, if PS3 detects the presence of a hand
before PS4 does, the hand must be moving from bottom to top. Refer to
– Proximity Sensing with CapSense
for
more details on the gesture detection algorithm.
Figure 2-9: Bottom-to-Top Gesture
2.3.1.3 Proximity Loop
The proximity loop PROX is provided to detect the presence of a target object at a large distance. This loop, with a diagonal
length of 10.3 cm, can be used to detect target objects at approximately 10 cm.
2.3.1.4 GND/SHIELD Loop
You can connect the GND/SHIELD loop to either ground or the shield by using the slide switch, SW1 (see
). The ground pattern near the proximity sensor improves the ESD immunity of the sensors by providing a low-
impedance ground path for ESD. However, any ground pattern present near the sensor reduces the proximity-sensing
distance. Also, there should be no ground near the sensors for liquid-tolerant designs. For liquid-tolerant or large proximity-
sensing distance designs, this loop must be connected to the shield pin using
2.3.2 Arduino-Compatible Headers
The I/O headers J1
–J4 comply with the Arduino UNO (R3) kit form factor to support similar form-factor baseboards, as the
following tables (
through
) show.
Table 2-1: J1 Arduino Header or Power Connector
Pin No.
Arduino Board Signal
CY8CKIT-024
CY8CKIT-040
CY8CKIT-042
J1.1
VIN
NC
VIN
VIN
J1.2
GND
GND
GND
GND
J1.3
GND
GND
GND
GND
J1.4
V5.0
NC
V5.0
V5.0
J1.5
V3.3
NC
V3.3
V3.3
J1.6
RESET
NC
RESET
RESET
J1.7
IOREF
P4.VDD
P4.VDD
P4.VDD
J1.8
NC
NC
NC
NC