AVR16EB32 datasheet(12/46 Pages) MICROCHIP

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AVR16EB32 Curiosity Nano

On-Board Debugger

User Guide

DS50003605B - 12

On-Board Debugger

Features and interfaces of the on-board debugger for programming and debugging.

3.1

On-Board Debugger Overview

AVR16EB32 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 AVR16EB32 in MPLAB® X IDE

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

(UART) on the AVR16EB32 and provides an easy way to communicate with the target application

through terminal software

• A mass storage device that allows drag-and-drop programming of the AVR16EB32

• 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 AVR16EB32 Curiosity

Nano board. The table below shows how the different operation modes control the LED.

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

Off

The on-board debugger is powered down, the LED is OFF

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

3.2

On-Board Debugger Connections

The table below shows the connections between the target and the debugger section. All the

connections between the target and the debugger are tri-stated when the debugger is not using the

interface. Hence, there are few contaminations of the signals, e.g., the pins can be configured to

anything the user wants.

Info: The 12-edge connections closest to the USB connector on Curiosity Nano

boards have a standardized pinout. The program/debug pins have different

functions depending on the target programming interface.

Table 3-2. On-Board Debugger Connections

Debugger Pin

AVR16EB32 Pin

Description

CDC TX

PC2

UART RX

USB CDC TX line

CDC RX

PC1

UART TX

USB CDC RX line

DBG0

PF7

ICSPDAT

Debug data line

DBG1

PF5

ICSPCLK

Debug clock line

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