ATTINY416-XNANO - MICROCHIP TECHNOLOGY

ATtiny416 Xplained Nano

Preface

The ATtiny416 Xplained Nano evaluation kit is a hardware platform to evaluate the ATtiny416

microcontroller.

Supported by the Atmel Studio integrated development platform, the kit provides easy access to the

features of the ATtiny416 and explains how to integrate the device into a custom design.

The Xplained Nano series of evaluation kits include an on-board mini embedded programmer, and no

external tools are necessary to program the ATtiny416.

Table of Contents

Preface............................................................................................................................ 1

1. Introduction................................................................................................................4

1.1. Features....................................................................................................................................... 4

1.2. Kit Overview................................................................................................................................. 4

2. Getting Started.......................................................................................................... 6

2.1. Xplained Nano Quick Start........................................................................................................... 6

2.2. Design Documentation and Relevant Links................................................................................. 6

3. Xplained Nano........................................................................................................... 7

3.1. Mini Embedded Debugger............................................................................................................7

3.1.1. Xplained Nano Clock Output......................................................................................... 7

3.2. Power Sources............................................................................................................................. 7

3.3. Xplained Nano Standard Pinout................................................................................................... 8

3.3.1. Standard Pinout for UPDI.............................................................................................. 8

3.4. Disconnecting mEDBG.................................................................................................................9

4. Hardware User Guide.............................................................................................. 11

4.1. Connectors................................................................................................................................. 11

4.1.1. ATtiny416 Xplained Nano Pinout................................................................................. 11

4.2. Current Measurement.................................................................................................................11

4.3. Peripherals................................................................................................................................. 12

4.3.1. LED..............................................................................................................................12

4.3.2. Mechanical Buttons..................................................................................................... 12

5. Embedded Debugger Implementation.....................................................................13

5.1. UPDI...........................................................................................................................................13

5.2. Virtual COM Port........................................................................................................................ 13

6. Hardware Revision History and Known Issues........................................................14

6.1. Identifying Product ID and Revision........................................................................................... 14

6.2. Revision 4...................................................................................................................................14

7. Document Revision History..................................................................................... 15

The Microchip Web Site................................................................................................ 16

Customer Change Notification Service..........................................................................16

Customer Support......................................................................................................... 16

Microchip Devices Code Protection Feature................................................................. 16

Legal Notice...................................................................................................................17

ATtiny416 Xplained Nano

Trademarks................................................................................................................... 17

Quality Management System Certified by DNV.............................................................18

Worldwide Sales and Service........................................................................................19

ATtiny416 Xplained Nano

1. Introduction

1.1 Features

• ATtiny416 microcontroller

• One yellow user LED

• One mechanical button

• mEDBG

– Auto-ID for board identification in Atmel Studio

– One green board status LED

– Programming

– Virtual COM port (CDC)

• USB powered

1.2 Kit Overview

The Microchip ATtiny416 Xplained Nano evaluation kit is a hardware platform to evaluate the Microchip

ATtiny416.

ATtiny416 Xplained Nano

Figure 1-1. ATtiny416 Xplained Nano Evaluation Kit Overview

UPDI

VREG

VUSB

GND

CLK O UT

CDC TX

CDC RX

VCC

PA0

PA1

PA2

PA3

PA4

PA5

GND

PC3

PC2

PC1

PC0

PB0

PB1

Micro USB Connector

User LED User button

mEDB G

(ATmega32U4)

ATtiny416

Power disconnect mEDB G dis connectStatus LED

UPDI

USER LED USER BTN

CDC T X

CDC RX

Power

Ground

Clock

Serial

Target I/O

Shared I/Os

Program/Debug

PA6

PA7

PB5

PB2

PB3

PB4

ATtiny416 Xplained Nano

2. Getting Started

2.1 Xplained Nano Quick Start

Steps to start exploring the Atmel Xplained Nano platform:

1. Download Atmel Studio.

2. Launch Atmel Studio.

3. Connect a USB cable (Standard-A to Micro-B or Micro-AB) between the PC and the USB port on

the kit.

When the Xplained Nano kit is connected to your computer for the first time, the operating system will

perform a driver software installation. The driver file supports both 32- and 64-bit versions of Microsoft®

Windows® XP, Windows Vista®, Windows 7, Windows 8, and Windows 10. The drivers for the kit are

included with Atmel Studio.

Once the Xplained Nano board is powered the green status LED will blink and Atmel Studio will auto

detect which Xplained Nano board is connected. Atmel Studio will present relevant information like

datasheets and kit documentation. The ATtiny416 device is programmed by the on-board Mini Embedded

Debugger and therefore no external programmer tool is required.

2.2 Design Documentation and Relevant Links

The following list contains links to the most relevant documents and software for the ATtiny416 Xplained

Nano.

•Xplained products - Xplained evaluation kits are a series of easy-to-use evaluation kits for

Microchip microcontrollers and other Microchip products.

– Xplained Nano - used for low pin-count devices and provides a minimalistic solution with

access to all I/O pins of the target microcontroller.

– Xplained Mini - used for medium pin-count devices and adds Arduino Uno compatible header

footprint and a prototyping area.

– Xplained Pro - used for medium to high pin-count devices that features advanced debugging

and standardized extensions for peripheral functions.

Note: All the above kits have on-board programmers/debuggers, which creates a set of low-cost

boards for evaluation and demonstration of features and capabilities of different Microchip products.

•Atmel Studio - Free IDE for the development of C/C++ and assembler code for microcontrollers.

•IAR Embedded Workbench® for AVR® - This is a commercial C/C++ compiler that is available for

8-bit AVR. There is a 30 day evaluation version as well as a 4 KB code size limited kick-start

version available from their website.

•http://start.atmel.com/ - Atmel START is an online tool that helps the user to select and configure

software components and tailor your embedded application in a usable and optimized manner.

•Microchip sample store - Microchip sample store where you can order samples of devices.

•Data Visualizer - Data Visualizer is a program used for processing and visualizing data. The Data

Visualizer can receive data from various sources such as the Embedded Debugger Data Gateway

Interface found on Xplained Pro boards and COM Ports.

•ATtiny416 Xplained Nano website - Kit information, latest user guide and design documentation.

•ATtiny416 Xplained Nano on Microchip Direct - Purchase this kit on Microchip Direct.

ATtiny416 Xplained Nano

3. Xplained Nano

Xplained Nano is an evaluation platform that provides a set of small boards with access to all

microcontroller I/O's. The platform consists of a series of low pin-count Microcontroller (MCU) boards,

which are integrated with Atmel Studio to present relevant user guides, application notes, data sheets,

and example code through Atmel Studio. The platform also features a Virtual COM port for serial

communication to a host PC.

3.1 Mini Embedded Debugger

The ATtiny416 Xplained Nano contains the Mini Embedded Debugger (mEDBG) for on-board

programming and debugging. The mEDBG is a composite USB device of two interfaces; a debugger and

a Virtual COM Port.

Together with Atmel Studio, the mEDBG debugger interface can program and debug the ATtiny416. On

ATtiny416 Xplained Nano, the UPDI interface is connected between the mEDBG and the ATtiny416.

The Virtual COM Port is connected to a UART on the ATtiny416 and provides an easy way to

communicate with the target application through the terminal software. It offers variable baud rate, parity,

and stop bit settings.

Note: The settings on the ATtiny416 must match the settings given in the terminal software.

Info: The virtual COM port in the mEDBG requires the terminal software to set the data

terminal ready (DTR) signal to enable the UART pins connected to the ATtiny416. If the DTR

signal is not enabled the UART pins on the mEDBG are kept in high-z (tri-state) rendering the

COM port unusable. The DTR signal is automatically set by some terminal software, but it may

have to be manually enabled in your terminal.

The mEDBG controls one status LED on the ATtiny416 Xplained Nano. The table below shows how the

LED is controlled in different operation modes.

Table 3-1. mEDBG LED Control

Operation mode Status LED

Power up LED is briefly lit

Normal operation LED is not lit

Programming Activity indicator; the LED flashes when

programming/debugging with the mEDBG

3.1.1 Xplained Nano Clock Output

The mEDBG output its CPU clock to the CLK pin 8 as shown in Xplained Nano Standard Pinout. The

clock output can be used to feed the target device with a more accurate clock if this is needed for the

application.

3.2 Power Sources

The kit can be powered by different sources. By default the kit will have a 5V supply and the voltage is

taken directly from the USB port through a 500 mA PTC fuse. The voltage from the USB connector can

vary between 4.4V to 5.25V (according to USB spec).

ATtiny416 Xplained Nano

If other voltages are required, the kit must be disconnected from the USB to avoid damage or contention

to the USB power. The mEDBG must also be disconnected from the target section of the board. The

board can be powered by applying a voltage to one of the power connections on the board, according to

the table below. To avoid any power leakage through the mEDBG, this should also be disconnected by

removing the resistors shown in Figure 3-3. For placement of power connections, see Xplained Nano

Standard Pinout.

Table 3-2. Power Connections

Power

Connection

Description

VUSB USB Voltage output when USB is connected (behind a PTC fuse). Can be used as

power input when USB is not used.

VREG Regulated voltage from VUSB. If the kit does not have a regulator, this is directly

connected to VUSB.

VCC Target voltage supply. By default connected to VREG through a 0Ω resistor. Apply

external voltage here if the resistor is removed.

Figure 3-1. Power Supply Block Diagram

USB Target MCUPTC

Power source

Power connection

Power consumer

0-ohm Resistor

VUSB /

VREG VCC

mEDBG

3.3 Xplained Nano Standard Pinout

Xplained Nano kits have a standard pinout in the mEDBG section as shown in the tables and figure

below. The program/debug pins will change depending on the target interface but will remain at the same

locations.

Xplained Nano kits have a target section where all I/O pins will be available and fanned out. Except for

the VCC and GND pins with fixed positions, there are no defined pin functions in this area. The first pin in

the target area is the VCC pin, located right next to the VREG pin of the standard section. The last pin is

GND, and it's located next to the CDC RX pin in the standard section. For reference, see the figure below.

3.3.1 Standard Pinout for UPDI

Table 3-3. Xplained Nano Standard Pinout for UPDI

Pin Number Name Description

1 NC No Connect

2 UPDI UPDI program/debug line

3 NC No Connect

ATtiny416 Xplained Nano

Pin Number Name Description

4 NC No Connect

5 VREG Regulated voltage or VUSB if no regulator present

6 UART RX mEDBG UART RX line

7 UART TX mEDBG UART TX line

8 CLK mEDBG clock output

9 GND Ground

10 VUSB USB voltage

Figure 3-2. Xplained Nano Standard Pinout for UPDI

UPDI

VREG

VUSB

GND

CLK OUT

CDC TX

CDC RX

VCC GND

Micro USB ConnectormEDBGPower disconnect Status LED

3.4 Disconnecting mEDBG

The target device can be completely separated from the mEDBG, but this requires some small

modifications to the board using a soldering iron. By removing the resistors in the sections shown in the

figure below, the mEDBG is completely disconnected from the target controller. If desired to connect the

mEDBG again, solder in 0Ω resistors or solder in 100-mil headers on the header footprints and use wire-

straps to connect the interfaces.

ATtiny416 Xplained Nano

Figure 3-3. Kit Modifications

Power disconnect mEDBG disconnect

ATtiny416 Xplained Nano

4. Hardware User Guide

4.1 Connectors

4.1.1 ATtiny416 Xplained Nano Pinout

The ATtiny416 Xplained Nano has a direct fan-out of the I/O pins of the device and all I/O's are

accessible at the edge connectors.

Table 4-1. Edge Connector

Edge

Connector

ATtiny416

Functions Shared Functionality

1 VCC Power supply

2 PA[0] ADC0_0/UPDI/RESET mEDBG UPDI

3 PA[1] ADC0_1/MOSI0/TxD0/SDA0 mEDBG CDC TX

4 PA[2] ADC0_2/MISO0/EVOUT0/RxD0/SCL0 mEDBG CDC RX

5 PA[3] ADC0_3/SCK0/WO3/CLKIN/XCK0

6 PA[4] ADC0_4/ADC1_0/XY0/SS0/WOA/XDIR

7 PA[5] ADC0_5/ADC1_1/XY1/

ACOUT/WO4/WOB

8 PA[6] ADC0_6/ADC1_2/XY2/ACN0/

DACOUT/WO5

9 PA[7] ADC0_7/ADC1_3/XY3/ACP0/

10 PB[5] ADC0_8/ACN1/CLKOUT/WO2 User LED

11 PB[4] ADC0_9/ACP1/WO1 User button

12 PB[3] TOSC1/EVOUT1/RxD0/WO0

13 PB[2] TOSC2/TxD0/WO2

14 PB[1] ADC0_10/XY4/XCK0/SDA0/WO1

15 PB[0] ADC0_11/XY5/XDIR0/SCL0/WO0

16 PC[0] ADC1_6/WOC/SCK0

17 PC[1] ADC1_7/WOD/MISO0

18 PC[2] ADC1_8/EVOUT2/MOSI0

19 PC[3] ADC1_9/SS0/WO3

20 GND Ground

4.2 Current Measurement

The power to the target controller ATtiny416 is connected from the VREG supply to the targets VCC

supply with a 0Ω resistor as shown in the figure below. To measure the power consumption of the device,

ATtiny416 Xplained Nano

remove the 0Ω resistor and replace it with an ammeter. The ammeter can be connected between the

VREG and VCC pads for easy measurement.

Tip: To connect the two power domains again, solder in a 0Ω resistor on the footprint or a 100-

mil header on the header footprint at the edge of the board and place a jumper between VREG

and VCC.

Caution: Removing the resistor while the kit is powered without an ammeter or jumper may

cause the ATtiny416 to be powered through its I/O pins. This may cause permanent damage to

the device.

Figure 4-1. Current Measurement

VREG

VCC

Power disconnect

4.3 Peripherals

4.3.1 LED

There is one yellow LED available on the ATtiny416 Xplained Nano board that can be turned ON and

OFF. The LED can be activated by driving the connected I/O line to GND.

Table 4-2. LED Connection

ATtiny416 Pin Function Shared Functionality

PB5 Yellow LED0 Edge connector

4.3.2 Mechanical Buttons

ATtiny416 Xplained Nano contains one mechanical button. This is a generic user configurable button and

when a button is pressed it will drive the I/O line to GND.

Info: There is no pull-up resistor connected to the generic user button. Remember to enable

the internal pull-up in the ATtiny416 to use the button.

Table 4-3. Mechanical Button

ATtiny416 Pin Description Shared Functionality

PB4 User button Edge connector

ATtiny416 Xplained Nano

5. Embedded Debugger Implementation

ATtiny416 Xplained Nano contains a Mini Embedded Debugger (mEDBG) that can be used to program

the ATtiny416 using Tiny Program Interface (TPI). The mEDBG also include a Virtual Com port interface

over UART. Atmel Studio can be used as a front-end for the Mini Embedded Debugger.

5.1 UPDI

The Unified Program Debug Interface (UPDI) use one pin to communicate with the target. For further

information on how to use the programming capabilities of the mEDBG, see Mini Embedded Debugger.

Table 5-1. UPDI Connections

ATtiny416 Pin Function Shared Functionality

PA0 UPDI mEDBG

5.2 Virtual COM Port

The Embedded Debugger acts as a Virtual Com Port gateway by using one of the ATtiny416 UARTs. For

further information on how to use the Virtual COM port, see Mini Embedded Debugger.

Table 5-2. Virtual COM Port Connections

ATtiny416 Pin Function Shared Functionality

PA1 UART0 TXD (ATtiny416 TX line) mEDBG CDC RX

PA2 UART0 RXD (ATtiny416 RX line) mEDBG CDC TX

ATtiny416 Xplained Nano

6. Hardware Revision History and Known Issues

This user guide provides the latest available revision of the kit. This chapter contains information about

known issues, a revision history of older revisions, and how older revisions differ from the latest revision.

6.1 Identifying Product ID and Revision

The revision and product identifier of Xplained Nano boards can be found in two ways; either through

Atmel Studio or by looking at the sticker on the bottom side of the PCB.

By connecting an Xplained Nano board to a computer with Atmel Studio running, an information window

will pop up. The first six digits of the serial number, which is listed under kit details, contain the product

identifier and revision.

The same information can be found on the sticker on the bottom side of the PCB. Most kits will print the

identifier and revision in plain text as A09-nnnn\rr, where nnnn is the identifier and rr is the revision.

Boards with limited space have a sticker with only a QR-code, which contains a serial number string.

The serial number string has the following format:

"nnnnrrssssssssss"

n = product identifier

r = revision

s = serial number

The product identifier for ATtiny416 Xplained Nano is A09-2795.

6.2 Revision 4

Revision 4 is the initially released revision.

ATtiny416 Xplained Nano

7. Document Revision History

Doc. rev. Date Comment

A 10/2017 Initial document release.

ATtiny416 Xplained Nano

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Note the following details of the code protection feature on Microchip devices:

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ATtiny416 Xplained Nano

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ATtiny416 Xplained Nano

ISBN: 978-1-5224-2197-9

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ATtiny416 Xplained Nano

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