Nordic Semiconductor nRF52 - Block Diagram; Power Supply Options

Hardware description
Figure 4: nRF52 DK (PCA10040) back view
4.2 Block diagram
The block diagram illustrates the nRF52 DK functional architecture.
External supply
Current
measurement
IF MCU USB
Battery
Buttons
Voltage regulator
LEDs
GPIO
nRF52832Interface MCU
VBUS
Data
Osc
32.768 kHz
IF Boot/Reset
SWD
VDD_nRF
Osc
32 MHz
Debug inDebug out
Power switch
Power switch
Matching
network
NFC
antenna
SWF switch/
RF connector
I/O
expander
Debouncing
filter
Switch
Switch
Switch
UART HWFC
UART DATA
PCB antenna
Figure 5: Block diagram
4.3 Power supply
The nRF52 DK has three power options: USB (5 V), external power supply (1.7 V to 3.6 V), and coin cell
battery.
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