Microchip Technology ATtiny104 Xplained Nano Manuel utilisateur

ATtiny104 Xplained Nano

ATtiny104 Xplained Nano Evaluation Kit User's Guide

Preface

The Microchip ATtiny104 Xplained Nano Evaluation Kit is a hardware platform to evaluate the ATtiny104

microcontroller.

Supported by the Atmel Studio and MPLAB® X integrated development platform, the kit provides easy access to the

features of the Microchip 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.

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.........................................................................................................................................6

3.1. Mini Embedded Debugger............................................................................................................6

3.2. Power Sources............................................................................................................................. 6

3.3. Xplained Nano Standard Pinout................................................................................................... 7

3.4. Disconnecting mEDBG.................................................................................................................8

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

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

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

4.3. Peripherals................................................................................................................................. 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. Fuse Masking............................................................................................................................. 12

6.3. Revision 2...................................................................................................................................12

6.4. Revision 1...................................................................................................................................12

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

The Microchip Website.................................................................................................................................14

Product Change Notification Service............................................................................................................14

Customer Support........................................................................................................................................ 14

Microchip Devices Code Protection Feature................................................................................................ 14

Legal Notice................................................................................................................................................. 14

Trademarks.................................................................................................................................................. 15

Quality Management System....................................................................................................................... 15

Worldwide Sales and Service.......................................................................................................................16

ATtiny104 Xplained Nano

1. Introduction

1.1 Features

• ATtiny104 Microcontroller

• One Yellow User LED

• One Mechanical Button

• mEDBG

– Auto-ID for board identification in Atmel Studio/Microchip MPLAB® X IDE

– One green board status LED

– Programming

– Virtual COM port (CDC)

• USB Powered

1.2 Kit Overview

The Microchip ATtiny104 Xplained Nano Evaluation kit is a hardware platform to evaluate the 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 Connector

User LED User button

mEDB G

ATtiny104

Power disconnect mEDB G disconnectStatus LED

TPI CLK

TPI DATA

RESET

USER L ED

USER BTN

CDC TX

CDC RX

Power

Ground

Clock

Serial

Target I/O

Shared I/Os

Program/Debug

ATtiny104 Xplained Nano

Introduction

2. Getting Started

2.1 Xplained Nano Quick Start

Steps to start exploring the Microchip Xplained Nano platform:

1. Download Atmel Studio/Microchip MPLAB® X IDE.

2. Launch Atmel Studio/Microchip MPLAB® X IDE.

3. Optional: Use Atmel START to generate drivers and examples.

4. Write your application code.

5. Connect a USB cable (Standard-A to Micro-B or Micro-AB) between the PC and the debug 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/

Microchip MPLAB® X IDE.

Once the Xplained Nano board is powered, the green status LED will blink and Atmel Studio/Microchip MPLAB® X

IDE will auto-detect which Xplained Nano board is connected. Atmel Studio/Microchip MPLAB® X IDE will present

relevant information like data sheets 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 - 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.

•MPLAB® X IDE - MPLAB® X IDE is a software program that runs on a PC (Windows®, Mac OS®, Linux®) to

develop applications for Microchip microcontrollers and digital signal controllers. It is called an Integrated

Development Environment (IDE) because it provides a single integrated “environment” to develop code for

embedded microcontrollers.

•MPLAB® Code Configurator - MPLAB® Code Configurator (MCC) is a free software plug-in that provides a

graphical interface to configure peripherals and functions specific to your application.

•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.

•Atmel START - 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 EDBG Data Gateway Interface found on Curiosity Nano and

Xplained Pro boards and COM Ports.

ATtiny104 Xplained Nano

Getting Started

•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.

ATtiny104 Xplained Nano

Getting Started

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/Microchip MPLAB® X IDE to present relevant user guides, application notes, data sheets, and example code

through Atmel Studio/Microchip MPLAB® X IDE. 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 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 the 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 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 the target

terminal.

The mEDBG controls one status LED on the 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 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 outputs its CPU clock to the CLK pin 8, as shown in 3.3 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).

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 3.3 Xplained Nano Standard Pinout.

ATtiny104 Xplained Nano

Xplained Nano

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 is located next to the

CDC RX pin in the standard section. For reference, see the figure below.

3.3.1 Standard Pinout for TPI

Table 3-3. Xplained Nano Standard Pinout for TPI

Pin Number Name Description

1 RST Reset line

2 TPID TPI Program data line

3 TPIC TPI Program clock output

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

ATtiny104 Xplained Nano

Xplained Nano

Figure 3-2. Xplained Nano Standard Pinout 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 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.

Figure 3-3. Kit Modifications

Power disconnect mEDBG disconnect

ATtiny104 Xplained Nano

Xplained Nano

4. Hardware User Guide

4.1 Connectors

4.1.1 ATtiny104 Xplained Nano Pinout

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 Pin 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.

ATtiny104 Xplained Nano

Hardware User Guide

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

ATtiny104 Xplained Nano

Hardware User Guide

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