User Manual Part 1

CY8CKIT-042-BLE Bluetooth® Low Energy (BLE) Pioneer Kit Guide, Doc. # 001-93731 Rev. *A 90
Hardware
The board also contains a CR2032 coin cell holder to power the board 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 board is powered from different voltage
sources at the same time.
■ ESD protection is provided for the USB mini-B connector.
I/OHeader
USB
Bluetooth
Module
5V
Vin
3.3V
PSoC 5LP
5V
PSoC 5LP 10 Pin
Prog. Header
PTC
LDO
ESD
Protection
MOSFET based
Protection Ckt
Coin cell
Battery Holder
PSoC 4 BLE 10
Pin Prog. Header
~3V