User Guide
48 of 56
002-32436 Rev. *B
<2021-06>
CY8CKIT-041S-
MAX PSoC™ 4100S Max pioneer kit guide
Hardware
3.
Rework to change the hatch pattern configuration for the Touchpad on the expansion board.
−
By default, hatch patterns are connected to ground.
−
Remove R9 and load R8 to connect the hatch pattern to a shield signal generated by CAPSENSE
™
MSC
block channel 0 (MSC0). Or load R10 to connect the hatch pattern to a shield signal generated by
CAPSENSE
™
MSC block channel 1 (MSC1). Both MSC channels (if both are enabled) are capable of driving
the shield for electrodes scanned from the other channel.
−
A shield driven hatch pattern provides performance improvements for the CSD (self-capacitance)
Touchpad.
−
There is also an option to ground Hatch_Pattern2 to improve EMC, by removing R7 and loading R6.
Table 11
Rework (to change hatch pattern configuration)
Reference
Description
Manufacturer
Mfr part #
R3, R4, R5, R6,
R7, R8, R9, R10
RES, 0 OHM, JUMPER, 1A, 0603
Yageo
RC0603JR-070RL
Figure 37
Schematics of expansion board hatch pattern rework for Touchpad
Table 12
Touchpad interface
Touchpad hatch pattern configurations
Reference
Hatch_Pattern1
←→
SHIELD 0
R8
Hatch_Pattern1
←→
SHIELD 1
R10
Hatch_Pattern1
←→
GND
R9 (default)
Hatch_Pattern1
←→
Hatch_Pattern2
R7 (default)
Hatch_Pattern2
←→
GND
R6
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