3.

Curiosity Nano

Curiosity Nano is an evaluation platform of small boards with access to most of the microcontrollers I/Os. The

platform consists of a series of low pin count microcontroller (MCU) boards with on-board debuggers, which are

integrated with Atmel Studio/Microchip MPLAB® X IDE. Each board is identified in the IDE. When plugged in, a Kit

Window is displayed with links to key documentation, including relevant user guides, application notes, data sheets,

and example code. Everything is easy to find. The on-board debugger features a virtual serial port (CDC) for serial

communication to a host PC and a Data Gateway Interface (DGI) with debug GPIO pin(s).

3.1

On-Board Debugger Overview

ATtiny1627 Curiosity Nano contains an on-board debugger for programming and debugging. The on-board debugger

is a composite USB device consisting of several interfaces:

• A debugger that can program and debug the ATtiny1627 in Atmel Studio/Microchip MPLAB® X IDE

• A mass storage device that allows drag-and-drop programming of the ATtiny1627

• A virtual serial port (CDC) that is connected to a Universal Asynchronous Receiver/Transmitter (UART) on the

ATtiny1627, and provides an easy way to communicate with the target application through terminal software

• A Data Gateway Interface (DGI) for code instrumentation with logic analyzer channels (debug GPIO) to visualize

program flow

The on-board debugger controls a Power and Status LED (marked PS) on the ATtiny1627 Curiosity Nano Board. The

table below shows how the LED is controlled in different operation modes.

Table 3-1. On-Board Debugger LED Control

Operation Mode

Power and Status LED

Boot Loader mode

The LED blinks slowly during power-up

Power-up

The LED is ON

Normal operation

The LED is ON

Programming

Activity indicator: The LED blinks slowly during programming/debugging.

Drag-and-drop

programming

Success:

The LED blinks slowly for 2 sec.

Failure:

The LED blinks rapidly for 2 sec.

Fault

The LED blinks rapidly if a power fault is detected

Sleep/Off

The LED is OFF. The on-board debugger is either in a sleep mode or powered down.

This can occur if the board is externally powered.

Info:  Slow blinking is approximately 1 Hz, and rapid blinking is approximately 5 Hz.

3.1.1

Debugger

The on-board debugger on the ATtiny1627 Curiosity Nano Board appears as a Human Interface Device (HID) on the

host computer’s USB subsystem. The debugger supports full-featured programming and debugging of the

ATtiny1627 using Atmel Studio/Microchip MPLAB® X IDE, as well as some third-party IDEs.

ATtiny1627

Curiosity Nano

© 2020 Microchip Technology Inc.

User Guide

DS40002199A-page 7