Atmel AVR STK500 - User Manual

Melissa PrinceSep 13, 2025

What to do if the preprogrammed example code does not toggle the LEDs on Atmel Motherboard?

C
Christopher StewartSep 13, 2025
If the preprogrammed example code doesn't toggle the LEDs, first check that there is an AVR device in the socket; if not, plug the AVR device into the correct socket. Secondly, ensure the LEDs are connected to the I/O ports by connecting the LEDS header to the PORTD header and the SWITCHES header to the PORTB header. Finally, if the Flash memory is erased, connect STK500 to a PC and reprogram the AVR device.

Brand	Atmel
Model	AVR STK500
Category	Controller
Language	English

Brand

Atmel

Model

AVR STK500

Section 1 Introduction

1.1 Starter Kit Features

Overview of the AVR STK500 starter kit's capabilities and components.

1.2 Device Support

Lists the AVR devices compatible with the STK500 starter kit.

Section 2 Getting Started

2.1 Unpacking the System

Details the contents of the STK500 starter kit package.

2.2 System Requirements

Specifies the minimum hardware and software needed for STK500 operation.

2.3 Quick Start

Provides initial steps to set up and test the STK500 starter kit.

2.3.1 Connecting the Hardware

Instructions for physically connecting the STK500 to a PC and target device.

2.3.2 Programming the Target AVR Device

Guide to programming an AVR device using AVR Studio and the STK500.

Section 3 Hardware Description

3.1 Description of User LEDs

Explains the function and implementation of the user-accessible LEDs.

3.2 Description of User Switches

Details the function and implementation of the user-accessible push-button switches.

3.3 Connection of LEDs and Switches

Shows how to connect LEDs and switches to I/O port headers for use.

3.4 Port Connectors

Describes the pinouts and connections for the general I/O port headers.

3.5 Description of User RS-232 Interface

Explains the two RS-232 ports on the STK500 and their usage.

3.6 Description of DataFlash Pins

Details the pins and connections related to the DataFlash memory interface.

3.7 Target Socket Section

Overview of the sockets for inserting target AVR devices for programming and operation.

3.7.1 ISP Programming

Explains In-System Programming (ISP) using the STK500.

3.7.2 High-voltage Programming

Describes the High-voltage Programming method for AVR devices.

3.8 Jumper Settings

Explains the function and default settings of various jumpers on the STK500.

3.8.1 Target Vcc Settings, VTARGET

Details how to set and control the target device's supply voltage (VTARGET).

3.8.2 Analog Reference Voltage, AREF

Explains the control and usage of the analog reference voltage (AREF).

3.8.3 Reset Settings, RESET

Describes how the RESET jumper controls the target AVR's reset signal.

3.8.4 Clock Settings, XTAL1 and OSCSEL

Explains how to configure clock sources and settings using jumpers.

3.9 Expansion Connectors

Information on expansion connectors for prototyping and additional modules.

3.10 Prog Ctrl and Prog Data Headers

Details the headers used for parallel High-voltage Programming.

3.11 Miscellaneous

Covers additional features like push buttons and status LEDs.

3.11.1 RESET Push Button

Explains the function of the RESET push button.

3.11.2 PROGRAM Push Button

Describes the PROGRAM push button's role in microcontroller upgrades.

3.11.5 Status LED

Explains the multi-color status LED and its indications.

Section 5 Using AVR Studio

5.1 Windows Software

Overview of the supporting software for STK500 within AVR Studio.

5.2 Starting the Windows Software

Instructions on how to launch and start AVR Studio and the STK500 interface.

5.3 STK500 User Interface

Detailed explanation of the various tabs and settings within the STK500 interface.

5.3.1 Program Settings

Configuration options for programming Flash and EEPROM memory.

5.3.2 Fuses Settings

How to read and write fuse bits for device configuration.

5.3.3 LockBits Settings

Management of device lock bits for protection and security.

5.3.4 Advanced Settings

Accessing advanced device features like signature bytes and oscillator calibration.

5.3.5 Board Settings

Adjusting board-level operating conditions like VTARGET and AREF.

5.3.6 Auto Settings

Automating programming sequences for multiple devices.

5.3.7 History Window

Reviewing the communication log between AVR Studio and STK500.

5.4 Command Line Software

Using STK500 through DOS commands for automated programming.

Section 8 Technical Support

Technical Support

Information on how to obtain technical assistance for the STK500.

Section 10 Appendix A

Appendix A

Contains supplementary information, including a block diagram.