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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