Table Of Contents
TABLE OF CONTENTS
.............................................................................1
STK503 USER GUIDE.....................................................................................................2
INTRODUCTION...............................................................................................................2
Features.......................................................................................................................................2
Known Issues
.......................................................................................................................3
Getting Started
....................................................................................................................4
Hardware overview...............................................................................................................................4
Mounting the STK503
..........................................................................................................................5
Placing the AVR in the ZIF socket......................................................................................................5
Programming the AVR
....................................................................................................7
In-System Programming (ISP)
............................................................................................................7
High-Voltage Parallel Programming (HVPP)
....................................................................................8
JTAG Programming
...................................................................................................................9
STK503 Clock Sources
................................................................................................10
The XTAL switch.................................................................................................................................10
The TOSC switch................................................................................................................................11
The External Memory Interface
...............................................................................11
SRAM footprint
....................................................................................................................................11
Address latch.......................................................................................................................................12
High address jumpers
........................................................................................................................12
RS-232 Driver
....................................................................................................................13
Debugging with JTAGICE mkII
...............................................................................14
Connecting the JTAGICE
..................................................................................................................14
Troubleshooting Guide
.................................................................................................15
Programming problems......................................................................................................................15
General problems.....................................................................................................................15
Problem
.......................................................................................................................................15
Appendix
...............................................................................................................................16
Port Connectors
..................................................................................................................................16
SRAM
...................................................................................................................................................16
Schematic and layout
..............................................................................................................17
1
STK503 User Guide
Introduction
STK503 is a top module to the STK500 development board from Atmel
Corporation. It adds support for 100-pin AVR microcontrollers (ATmega2560,
ATmega1280 and ATmega640).
STK503 includes connectors and hardware allowing full utilization of the features
of these devices, while the Zero Insertion Force (ZIF) socket makes it easy to
use TQFP packages for prototyping.
This user guide is a general getting started guide as well as a complete technical
reference for advanced users.
Figure 1-1 The STK503 starter kit
Features
•
•
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•
•
•
•
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Supports the ATmega2560, ATmega1280 and ATmega640.
Zero Insertion Force (ZIF) socket for 100-pin TQFP packages
Supports High Voltage Parallel Programming through STK500
Supports Serial programming through STK500
Port connectors for port E, F G, H, J, K and L
On-board RS-232 converter covering the whole operation range from 1.8
to 5.5V
Footprint for user-mountable SRAM chip
On-board address latch for easy connection to memory and peripherals
JTAG Connector for on-chip debugging using JTAGICE mkII
On-board 32 kHz crystal for easy Real Time Clock implementations
Supported by AVR Studio 4
2
Known Issues
January 2005: There are no known issues.
3
Getting Started
In this chapter you will get an overview of all the features of the STK503. You will
learn how to use the STK503 with STK500 and how to mount the AVR in the ZIF
socket.
Hardware overview
The STK503 is a flexible tool to start developing and debugging applications for
100-pin AVRs as the ATmega2560. There are connectors for all available
signals, making it easy to connect to your own hardware, if required.
Figure 3-1: STK503
ZIF socket:
Here you place the AVR. See
Placing the AVR
for more details.
JTAG connector:
This is the connection that lets you upload and debug your application
with the JTAGICE mk II. See
JTAG programming
and
JTAG debugging.
ISP connector:
By mounting a cable between this connector and the programming
connector on STK500, you can easily upload new programs to the AVR.
See
In-System Programming
for a description on how to use AVR Studio
and how connect the cable.
Clock source switches:
The STK503 has two switches that lets you select between different on-
board and external clock sources. This is described in the
Clock options
chapter.
SRAM footprint:
The board has a footprint for an SRAM chip. No SRAM is mounted, so
you can select an SRAM with the right operating voltage. For more
information on using the SRAM and it connection, see the
External
Memory Interface
chapter.
4
RAM HIGH ADDRESS jumpers:
These jumpers are for disabling some of the address lines from the
controller to the SRAM. See the
External Memory Interface
chapter.
RS-232 connector:
The STK503 has an on-board RS-232 converter. In order to use it, you
must connect the AVR to the AVR side of the connector, and the external
RS-232 equipment (such as a PC) to the RS-232 side. See
RS-232
Driver
for more information.
PORTx connectors:
All of the AVR ports are accessible on the port connectors. They are
marked with text corresponding to the name of the AVR port. In addition
to the port pins, they also have VCC and GND pins. See the
Appendix
for
pinout.
Mounting the STK503
First of all the STK503 must be mount on top of the STK500.
1.
Turn off power on the STK500.
2.
Remove any other top cards.
3.
Remove any devices from sockets of the STK500.
4.
Place the STK503 on STK500. Make sure the EXPAND0 and EXPAND1
headers on both cards align properly.
Figure 3-2: Mounting the STK503
Placing the AVR in the ZIF socket
The ZIF socket on STK503 takes AVRs in 100-pin TQFP packages.
To use STK500 and 100-pin AVR devices with LCD controller such as the
ATmega3290 and ATmega6490, you must use the STK504 top module,
not
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