User Guide
45 of 56
002-32436 Rev. *B
<2021-06>
CY8CKIT-041S-
MAX PSoC™ 4100S Max pioneer kit guide
Hardware
3.2.11.3
Hatch pattern configuration
The board supports driven shield that can drive the hatch pattern surrounding the touchpad proximity region
and slider region. By default, hatch patterns are connected to ground. A shield signal driven hatch pattern
provides performance improvements for CSD (self-capacitance) sensing by reducing the paracitic capacitance
and provides liquid tolerance.
Hatch_Pattern1
–
Hatch pattern which surrounds the touchpad in top layer and below the touchpad in bottom
layer. Driving this with shield signal provides performance improvements for CSD touchpad and provides liquid
tolerance.
Hatch_Pattern2 - Hatch pattern which surrounds the proximity in top layer. Driving Hatch_Pattern1 and
Hatch_Pattern2 together with shield signal provides better detection range for the proximity loop. And
grounding Hatch_Pattern2 gives an option to improve EMC.
Hatch_Pattern3 - Hatch pattern which surrounds the slider in top layer and below the slider in bottom layer.
Driving this with shield signal provides performance improvements for CSD slider and provides liquid tolerance.
Figure 34
Schematics of hatch pattern configuration
Hatch_Pattern1
HATCH_PATTERN1
SH
1
CS_SHIELD1
R10
0 OHM
DNI
Hatch_Pattern2
Hatch_Pattern1
R6
0 OHM
DNI
HATCH_PATTERN2
SH
1
R8
0 OHM
DNI
R9
0 OHM
CapSense Shield for Touchpad
R7
0 OHM
CS_SHIELD0
P11_3
R36
560 OHM
R14
560 OHM
CS_SHIELD1
CS_SHIELD0
P0_2
2nd Layer Hatch Pattern
CapSense Shield for Slider
R5
0 OHM
DNI
Hatch_Pattern1
Hatch_Pattern3
R4
0 OHM
GND
HATCH_PATTERN3
SH
1
P11_3
TIE1
CS_SHIELD1
CS_SLD_SHIELD1
R14
560 OHM
R3
0 OHM
DNI
CS_SHIELD0
CS_SLD_SHIELD0
R36
560 OHM
P0_2