Atmel megaAVR User manual

i
Table of Contents
Section 1
Introduction...........................................................................................1-1
1.1 Device Support .........................................................................................1-1
Section 2
Getting Started......................................................................................2-1
2.1 Unpacking the System..............................................................................2-1
2.2 System Requirements...............................................................................2-1
Section 3
Connecting the System.........................................................................3-1
Section 4
Hardware Description...........................................................................4-1
4.1 Jumpers, Links and their Functions ..........................................................4-2
4.2 External Connections................................................................................4-2
Section 5
Installing the Software ..........................................................................5-1
5.1 Windows 95 ..............................................................................................5-1
5.2 Windows 3.1 .............................................................................................5-1
Section 6
How to Use the Software......................................................................6-1
6.1 Projects.....................................................................................................6-1
6.2 Files ..........................................................................................................6-1
Section 7
Programming Using the Board .............................................................7-1
7.1 Device Orientation ....................................................................................7-1
7.2 Voltage Selection......................................................................................7-1
7.3 Power and Lead Connections...................................................................7-2
Section 8
Brown-Out Detector..............................................................................8-1
Section 9
Board Applications................................................................................9-1
9.1 Using Switches and LEDs.........................................................................9-1
9.2 Using External Connections......................................................................9-1

Table of Contents
ii
9.2.1 Misc. Header ......................................................................................9-2
9.3 Using Analog Functions............................................................................9-2
9.3.1 Analog Port: Marked on Board...........................................................9-2
9.3.2 Using Internal Reference....................................................................9-2
9.3.3 Using External Reference...................................................................9-3
9.4 Using External RAM..................................................................................9-3
9.4.1 RAM Recommendations.....................................................................9-3
9.4.2 RAM Socket Pin Layout......................................................................9-3
9.4.3 Address Latch.....................................................................................9-3
9.5 Using LCD Connections............................................................................9-3
9.6 Using RS232.............................................................................................9-4
9.7 Programming In-System ...........................................................................9-4
9.8 ISP Header Layout....................................................................................9-5
9.9 Interface Using Resistors..........................................................................9-5
9.10 Using an Analogue Multiplexer IC.............................................................9-5
9.10.1 Using Real Time Clock.......................................................................9-6

megaAVR™ Starter Kit Manual 1-1
Section 1
Introduction
Welcome to the megaAVR™Starter Kit.
This system incorporates an applications board and in-system programming hardware
key for programming AVR®devices in your application. Be sure to check the
README.TXT file included with the software for installation information.
1.1 Device Support The system software currently has support for the following devices.
■ATmega603
■ATmega603L
■ATmega103
■ATmega103L
Software upgrades for new devices will be available in the AVR section of the Atmel
website, which is located at http://www.atmel.com.

Introduction
1-2 megaAVR™ Starter Kit Manual

megaAVR™ Starter Kit Manual 2-1
Section 2
Getting Started
2.1 Unpacking the
System Contents of box:
■Evaluation Board
■Disk set consisting of AVR ISP software and STK300 Application Builder
■In-System Programming (ISP) Dongle
■ISP Ribbon Cable
2.2 System
Requirements The minimum hardware and software requirements are:
■80386 Processor or Above
■1MB Ram
■1MB Free Hard Disk Space
■Windows 3.1 or Windows 95

Getting Started
2-2 megaAVR™ Starter Kit Manual

megaAVR™ Starter Kit Manual 3-1
Section 3
Connecting the System
A Power Supply is required with a standard 2.1mm barrel connector. It can be AC 7 -
12V or DC 9 - 15V. The connector is inserted into the power connection socket as
shown, above.
The programming lead supplied is fitted into the Dongle case and the other end is
inserted into the programming interface on the board as shown.
The Dongle case is connected to one of the printer ports on the PC. If this is not LPT1,
then you will need to change the printer port setting in the software—see software sec-
tion for details.
PLUG HEADER ON LEAD
INTO PROGRAMMING
INTERFACE - KEY WAY
GIVES ORIENTATION
CONNECT LEAD
SUPPLIED TO DONGLE
AND INSERT IN
PC PRINTER PORT
POWER SUPPLY
9 - 15V DC
7 - 12V AC
ON-OFF SWITCH
RS 232 CONNECTOR
NOT USED FOR
PROGRAMMING
POWER CONNECTOR
5.5/2.1 BARREL

Connecting the System
3-2 megaAVR™ Starter Kit Manual

megaAVR™ Starter Kit Manual 4-1
Section 4
Hardware Description
The main features of the board are shown in the diagram below.
Note:
There are a number of jumpers on the board which are used to select different
operations and voltages. The default jumper settings are for programming oper-
ations at 5V JP1 Closed, with brown-out also set to 5V JP2 Open.
To carry out other operations, some jumpers may have to be removed—refer to
the relevant section for details. A full list of the jumpers and links are given in the
following table.
LCD CONNECTOR
ANALOG REFERENCE
VOLTAGE ADJUSTMENT
PLUG IN MEGA
BOARD HERE
ANALOG I/P
PORT A DIGITAL
4 MHz CRYSTAL
PORT B HEADER
PORT C HEADER
PORT D JUMPERS
DISABLE SWITCHES
PORT D HEADER
MISC. HEADER
FOR NON-PORT PINS
JP2 - JUMPER
FOR BROWN-OUT
AT 2.9V OR 4.5V
8 LEDS ON
PORT B
8 SWITCHES
ON PORT D
JP1 JUMPER FOR
3.3 OR 5V VCC SELECT
ON-OFF
SWITCH
POWER INPUT
9-15V DC
OR 7-12 AC
RS232
PORT B JUMPERS
DISABLE LEDS
POWER ON AND
PROG LIGHTS
SELECTOR
FOR RS232
ISP INTERFACE
ADDRESS LATCH
IC FOR RAM
EXTERNAL
SRAM SOCKET
EXTERNAL
MEMORY EXPANSION
LCD CONTRAST
ADJUSTMENT
LK1 - CUT FOR A/D
EXTERNAL REFERENCE
O/P PINS FOR -VE
SUPPLY TO
OPAMP ETC.
PORT E HEADER

Hardware Description
4-2 megaAVR™ Starter Kit Manual
4.1 Jumpers, Links
and their
Functions
4.2 External
Connections All Ports are brought out to edge of board on to headers. Each header has a VCC and
Ground pin for power supply to external circuits. Port F is the Analog input port and is on
the header marked “Analog”. There is an extra six-pin header for miscellaneous func-
tions—Read, Write, ALE, Reset, Ground and VCC.
See sections “Using External Connections” on page 9-1 and “Using Analog Functions”
on page 9-2 for details.
Jumper Function Open Closed Default
JP1 Voltage select 5V 3.3V Open
JP2 Brown-out select 2.9V 4.5V Closed
PE0 RS232 RXD Port E.0 RXD Port E.0
PE1 RS232 TXD Port E.1 TXD Port E.1
Port B LEDs LEDs Disabled LEDs Enabled Closed
Port D Switches Switches Disabled Switches Enabled Closed
LK1 Analog
Reference If LK1 cut, then EXTERNAL REF
from header
ONBOARD POT Closed
CUT Under
Board LCD Contrast If Cut, add extra resistor Contrast Pot Closed