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...........continued
Debugger Signal
VTG
GND
DBG0
DBG3
VOFF
VBUS
Figure 3-1. Curiosity Nano Standard Pinout
3.3
Power Supply
The kit is powered through the USB port and contains two regulators for generating 3.3V for the debugger, and an
adjustable regulator for the target. The voltage from the USB connector can vary between 4.4V to 5.25V (according
to the USB specification) and will limit the maximum voltage to the target. The following figure shows the entire power
supply system on the SAME51J20A Curiosity Nano.
Figure 3-2. Power Supply Block Diagram
3.3.1
Target Regulator
The target voltage regulator is a MIC5353 variable output LDO. The on-board debugger can adjust the voltage output
that is supplied to the kit target section by manipulating the feedback voltage of the MIC5353. The hardware
implementation is limited to an approximate voltage range from 1.8V to 5.1V. Additional output voltage limits are
©
2020 Microchip Technology Inc.
ICSP Target
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SWDATA
nRESET
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User Guide
EV76S68A
Curiosity Nano
Description
Target voltage
Common ground.
Debug data line.
Reset line
Voltage Off input.
VBUS voltage for external use.
DS70005432A-page 7
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