User's Manual

CY8CKIT-042-BLE-A Bluetooth® Low Energy (BLE) Pioneer Kit Guide, Doc. # 002-11468 Rev. *A 108
Hardware
5.2.2 Module Power Connections
The module has three power domains: VDDD, VDDA, and VDDR. The VDDD connection supplies
power for digital device operation, VDDA supplies power for analog device operation, and VDDR
connection supplies power for the device radio. By default, these domains are shorted using a
330-ohm, 100-MHz ferrite bead. The domains are shorted for standalone usage scenarios of mod-
ule, such as programming the module using MiniProg 3 or using the module as a standalone data
acquisition unit.
It is recommended to place the ferrite bead between the supply to avoid ripple between VDDR and
the other two domains. If the supply ripple is less that 100 mV, these can be changed to a zero-ohm
resistor.
Figure 5-22. Schematics and Board Highlight of Ferrite Bead and Power Pin
5.2.3 Module Headers (20-Pin and 24-Pin Headers)
The PSoC 4 BLE and PRoC BLE Modules connect to the BLE Pioneer Baseboard using two (20-pin
and 24-pin) module headers (Figure 5-23). All GPIOs and power domains are brought out to these
headers. These headers are the counterparts of the connectors in Expansion Connectors on
page 96.