CY8CKIT-064S0S2-4343W PSoC 64 Standard Secure – AWS Wi-Fi BT Pioneer Kit Guide, Doc. # 002-30680 Rev. *B
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Hardware
4.3
PSoC 64 Standard Secure – AWS Wi-Fi BT Pioneer Kit Rework
4.3.1
CapSense Shield
The hatched pattern around the CapSense buttons and slider are connected to ground. In case
liquid tolerance is required, this pattern needs to be connected to a shield pin. This pattern can be
connected to P7[4] by populating R38 and removing R56. Pin P7[4] needs to be configured as a
shield pin in the firmware. CINTB (C15 on MOD1) connected to P7[2] must be configured as CSH in
firmware when using the CapSense Shield.
Connecting the hatched pattern to shield instead of ground will also reduce the parasitic capacitance
of the sensors.
Figure 4-19. Schematics of CapSense Shield
4.3.2
ETM Trace Header
The 20-pin ETM trace header J12 is not loaded by default and the lines to the header are used as I/
Os on header J2. To connect the PSoC 64 MCU to trace header, populate the resistors R126–R129
and remove resistors R117, R123–R125.
Figure 4-20. ETM Trace Header
4.3.3
microSD Card Detect Multiplexing
On the PSoC 64 MCU, the default card detect pin for the SHDC block is P12[1]. However, on this kit,
P13[7] is connected to the card detect pin on the microSD card slot. Therefore, the firmware must be
modified to use P13[7] as the card detect pin. In order to instead use the default PSoC 64 MCU card
detect pin, remove R161 and load R159. In this case, P13[7] can optionally be used as a GPIO by
loading R160 which connects it to an I/O header.
Figure 4-21. microSD Card Detect Multiplexing
p
R155
0 OHM
PAD_CAP_SH
IO15
R38
0 OHM
No Load
CS_CAP_SH
CapSense Shield
HATCH
CS_CAP_SH
CAP_SH1
SH
1
R56
0 OHM
R123
0 OHM
R124
0 OHM
R125
0 OHM
R126
0 OHM
No Load
R127
0 OHM
No Load
R128
0 OHM
No Load
R129
0 OHM
No Load
PAD_A10
PAD_A11
PAD_A8
PAD_A9
A8
A11
A10
A9
TRACEDATA_1
TRACEDATA_0
TRACEDATA_3
TRACEDATA_2
R117
0 OHM
TRACE Multiplexed Pins
ARD_D12
IO16
SD_CD_L
R161
0 OHM
R160
0 OHM
No Load
PAD_SD_CD_L
R159
0 OHM
No Load
Card Detect Multiplexing