Atmel ATtiny104 Xplained Nano Manuel utilisateur

Atmel AVR 8-bit Microcontrollers

ATtiny104 Xplained Nano

USER GUIDE

Preface

The Atmel® ATtiny104 Xplained Nano evaluation kit is a hardware platform to

evaluate the ATtiny104 microcontroller.

Supported by the Atmel Studio integrated development platform, the kit

provides easy access to the features of the Atmel ATtiny104 and explains

how to integrate the device in a custom design.

The Xplained Nano MCU series evaluation kits include an on-board mini

embedded programmer, and no external tools are necessary to program the

ATtiny104.

Atmel-42671A-ATtiny104-Xplained-Nano_User Guide-02/2016

Table of Contents

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

1. Introduction................................................................................................................3

1.1. Features....................................................................................................................................... 3

1.2. Kit Overview................................................................................................................................. 3

2. Getting Started...........................................................................................................4

2.1. Xplained Nano Quick Start........................................................................................................... 4

2.2. Design Documentation and Relevant Links................................................................................. 4

3. Xplained Nano........................................................................................................... 5

3.1. Mini Embedded Debugger............................................................................................................5

3.1.1. Xplained Nano Clock Output......................................................................................... 5

3.2. Power Sources............................................................................................................................. 5

3.3. Xplained Nano Standard Pin-Out................................................................................................. 6

3.3.1. Standard Pin-Out for TPI............................................................................................... 6

3.4. Disconnecting mEDBG.................................................................................................................7

4. Hardware User Guide................................................................................................9

4.1. Connectors................................................................................................................................... 9

4.1.1. ATtiny104 Xplained Nano Pin-Out................................................................................. 9

4.2. Current Measurement...................................................................................................................9

4.3. Peripherals................................................................................................................................. 10

4.3.1. LED..............................................................................................................................10

4.3.2. Mechanical Buttons..................................................................................................... 10

5. Embedded Debugger Implementation..................................................................... 11

5.1. Tiny Program Interface............................................................................................................... 11

5.2. Virtual COM Port.........................................................................................................................11

6. Hardware Revision History and Known Issues........................................................12

6.1. Identifying Product ID and Revision........................................................................................... 12

6.2. Revision 2...................................................................................................................................12

7. Document Revision History..................................................................................... 13

8. Evaluation Board/Kit Important Notice.....................................................................14

Atmel ATtiny104 Xplained Nano [USER GUIDE]

Atmel-42671A-ATtiny104-Xplained-Nano_User Guide-02/2016

1. Introduction

1.1. Features

•ATtiny104 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 Atmel ATtiny104 Xplained Nano evaluation kit is a hardware platform to evaluate the Atmel

ATtiny104.

Figure 1-1. ATtiny104 Xplained Nano Evaluation Kit Overview

RESET

TPI DATA

TPI CLK

VREG

VUSB

GND

CLK OUT

CDC T X

CDC RX

VCC

PA0

PA1

PA2

PA3

PA4

PA5

GND

PB3

PB2

PB1

PB0

PA7

PA6

Micro USB Con nector

User LED User button

mEDBG

ATtiny104

Power discon nect mEDBG d is connectStatus LED

TPI CLK

TPI DATA

RESET

USER LED

USER BTN

CDC T X

CDC RX

Power

Ground

Clock

Serial

Target I/O

Shared I/Os

Program/Debug

Atmel ATtiny104 Xplained Nano [USER GUIDE]

Atmel-42671A-ATtiny104-Xplained-Nano_User Guide-02/2016

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 ATtiny104 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 ATtiny104 Xplained

Nano.

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

Atmel microcontrollers and other Atmel products. For low pin-count devices the Xplained Nano

series provides a minimalistic solution with access to all I/O pins of the target microcontroller.

Xplained Mini kits are for medium pin-count devices and adds Arduino Uno compatible header

footprint and a prototyping area. Xplained Pro kits are for medium to high pin-count devices, they

features advanced debugging and standardized extensions for peripheral functions. All these kits

have on board programmers/debuggers which creates a set of low-cost boards for evaluation and

demonstration of features and capabilities of different Atmel products.

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

microcontrollers.

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

•Atmel Data Visualizer - Atmel Data Visualizer is a program used for processing and visualizing

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

Gateway Interface found on Xplained Pro boards and COM ports.

•Design Documentation - Package containing CAD source, schematics, BOM, assembly drawings,

3D plots, layer plots etc.

•Hardware Users Guide in PDF format - PDF version of this User Guide.

Atmel ATtiny104 Xplained Nano [USER GUIDE]

Atmel-42671A-ATtiny104-Xplained-Nano_User Guide-02/2016

3. Xplained Nano

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

microcontoller 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, datasheets, 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 ATtiny104 Xplained Nano contains the Atmel Mini Embedded Debugger (mEDBG) for on-board

programming. 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 the ATtiny104. On ATtiny104

Xplained Nano, the TPI interface is connected between the mEDBG and the ATtiny104.

The Virtual COM Port is connected to a UART on the ATtiny104 and provides an easy way to

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

stop bit settings.

Note: The settings on the ATtiny104 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 ATtiny104. If the DTR

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

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

have to be manually enabled in your terminal.

The mEDBG controls one status LED on ATtiny104 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 lit briefly

Normal operation LED is not lit

Programming Activity indicator; 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 Pin-Out on page

6. 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 ATtiny104 Xplained Nano 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 500mA PTC fuse. The voltage from

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

Atmel ATtiny104 Xplained Nano [USER GUIDE]

Atmel-42671A-ATtiny104-Xplained-Nano_User Guide-02/2016

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 power 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 Kit Modifications on page 8. For placement of power

connections, see Xplained Nano Standard Pin-Out on page 6.

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 Pin-Out

Xplained Nano kits have a standard pin-out 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 stadard section. For reference, see figure below.

3.3.1. Standard Pin-Out for TPI

Table 3-3. Xplained Nano mEDBG Standard Pin-Out

Pin number Name Description

1 RST Reset line

2 TPID TPI Program data line

3 TPIC TPI Program clock output

Atmel ATtiny104 Xplained Nano [USER GUIDE]

Atmel-42671A-ATtiny104-Xplained-Nano_User Guide-02/2016

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 Pin-Out for TPI

RESET

TPI DATA

TPI CLK

VREG

VUSB

GND

CLK OUT

CDC TX

CDC RX

VCC GND

Micro USB ConnectormEDBGPower disconnect Status LED

3.4. Disconnecting mEDBG

The target controller ATtiny104 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.

Atmel ATtiny104 Xplained Nano [USER GUIDE]

Atmel-42671A-ATtiny104-Xplained-Nano_User Guide-02/2016

Figure 3-3. Kit Modifications

Power disconnect mEDBG disconnect

Atmel ATtiny104 Xplained Nano [USER GUIDE]

Atmel-42671A-ATtiny104-Xplained-Nano_User Guide-02/2016

4. Hardware User Guide

4.1. Connectors

4.1.1. ATtiny104 Xplained Nano Pin-Out

The ATtiny104 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

ATtiny104

Functions Shared functionality

1 VCC Power supply

2 PA[0] PCINT0/ADC0/AIN0/T0/CLKI/TPICLK mEDBG TPI Clock

3 PA[1] PCINT1/ADC1/AIN1/OC0B/TPIDATA mEDBG TPI Data

4 PA[2] PCINT2/RESET mEDBG Reset

5 PA[3] PCINT3/OC0A

6 PA[4] PCINT4/ICP0

7 PA[5] PCINT5/ADC2/OC0B User LED

8 PA[6] PCINT6/ADC3

9 PA[7] PCINT7

10 PB[0] PCINT8/ADC4

11 PB[1] PCINT9/INT0/ADC5/XCK0/OC0A/CLKO User button

12 PB[2] PCINT10/ADC6/TxD0/ICP0 mEDBG CDC RX

13 PB[3] PCINT11/ADC7/ACO/RxD0/T0 mEDBG CDC TX

14 GND Ground

4.2. Current Measurement

The power to the target controller ATtiny104 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,

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.

Atmel ATtiny104 Xplained Nano [USER GUIDE]

Atmel-42671A-ATtiny104-Xplained-Nano_User Guide-02/2016

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

cause the ATtiny104 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 ATtiny104 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

ATtiny104 pin Function Shared functionality

PA5 Yellow LED0 Edge connector

4.3.2. Mechanical Buttons

ATtiny104 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 ATtiny104 to use the button.

Table 4-3. Mechanical Button

ATtiny104 pin Description Shared functionality

PB1 User button Edge connector

Atmel ATtiny104 Xplained Nano [USER GUIDE]

Atmel-42671A-ATtiny104-Xplained-Nano_User Guide-02/2016

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