User's Manual

CY8CKIT-042-BLE-A Bluetooth® Low Energy (BLE) Pioneer Kit Guide, Doc. # 002-11468 Rev. *A 91
Hardware
The BLE Pioneer Baseboard also contains a CR2032 coin cell holder to power it using a coin cell, as
shown in Figure 5-2.
Figure 5-2. Schematics and Board Highlight of Coin Cell Holder
5.1.2.1 Protection Circuits
The power supply rail has reverse-voltage, overvoltage, short circuits, and excess current protection
features, as shown in Figure 5-3.
Figure 5-3. Power Supply Block Diagram With Protection Circuits
A PTC resettable fuse is connected to protect the computer's USB ports from shorts and
overcurrent.
ORing diodes prevent damage to components when the BLE Pioneer Baseboard is powered
from different voltage sources at the same time.
ESD protection is provided for the USB Mini-B connector.
BLE
Module
5V
Vin
3.3V
PSoC 5LP
5V
PSoC 5LP 10 Pin
Prog. Header
LDO
ESD
Protection
MOSFET based
Protection Ckt
Coin cell
Battery Holder
PSoC 4 BLE 10
Pin Prog. Header
~3V