AVR16EB32 datasheet(24/46 Pages) MICROCHIP

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AVR16EB32 Curiosity Nano

Hardware Implementation

User Guide

DS50003605B - 24

4.4.1

Cut Straps

All power and debugging signals are connected to the target by default. The following cut straps are

available to take measurements or separate the debugger from the target:

• Target Power Strap (J201)

• Power Supply Strap (J200)

• Debugger Pins (J101, J102, J104, J105, J106)

Figure 4-6. Common Curiosity Nano Cut Straps

Target Power

Strap

Power Supply

Strap

GPIO

Straps

4.4.2

Target Regulator

The target voltage regulator is a MIC5353 variable output LDO. The on-board debugger can adjust

the voltage output supplied to the board target section by manipulating the MIC5353’s feedback

voltage. The hardware implementation is limited to an approximate voltage range from 1.7V to 5.1V.

Additional output voltage limits are configured in the debugger firmware to ensure that the output

voltage never exceeds the hardware limits of the AVR16EB32 microcontroller. The voltage limits

configured in the on-board debugger on AVR16EB32 Curiosity Nano are 1.8–5.5V.

Info: The factory default target voltage is 3.3V. The project properties in MPLAB®

X IDE can change it. Any change to the target voltage is persistent, even after a

power toggle. The resolution is less than 5 mV but may be limited to 10 mV by the

adjustment program.

Info: The voltage settings setup in MPLAB® X IDE is not applied immediately

to the board. Like clicking the Refresh Debug Tool Status button in the project

dashboard tab or programming/reading program memory, the new voltage

setting is applied to the board when accessing the debugger.

Info: There is an easy option to adjust the target voltage with a drag-and-drop

command text file to the board, which supports a set of commonly used target

voltages. See section Special Commands for further details.

MIC5353 supports a maximum current load of 500 mA. It is an LDO regulator in a small package

placed on a small printed circuit board (PCB) and can reach the thermal shutdown condition at

lower loads than 500 mA. The maximum current load depends on the input voltage, the selected

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