Atmel AT91EB42 Section 1 Overview

AT91EB42 Evaluation Board User Guide 1-1

Section 1Overview

1.1 Scope The AT91EB42 Evaluation Board enables real-time code development and evaluation.

It supports the AT91M42800.

This guide focuses on the AT91EB42 Evaluation Board as an evaluation and demon-

stration platform:

Section 1 provides an overview.

Section 2 describes how to set up the evaluation board.

Section 3 details the on-board software.

Section 4 contains a description of the circuit board.

Section 5 and Section 6 are two appendices covering configuration straps and

schematics, including pin connectors.

1.2 Deliverables The evaluation board is delivered with a DB9 plug-to-DB9 socket str aight-through serial

cable to connect the target evaluation board to a PC. A bare p ower lead with a 2.1 mm

jack on one end for connection to a bench power supply is also delivered.

The evaluation board is also delivered with a CD-ROM th at contains an evaluation ver-

sion of the software development toolkit and the documentation that outlines the AT91

microcontroller family.

The evaluation board is capable of supporting different kinds of debugging systems,

using an ICE interface or the on-board Angel Debug Monitor. Refer to the AT91EB42

Getting Started Tutorial documents for recommendations on using the eval uation board

in a full debug environment.

1.3 The AT91EB42

Evaluation Board

The board consists of an AT91M42800 together with several peripherals:

Two serial ports

Reset push button

Four user-defined push buttons

Eight LEDs

a 256 KB 16-bit SRAM (upgradeable to 1M byte)

a 2 MB 16-bit Flash (of which 1M byte is available for user software)

a 4 MB Serial Data Flash

a 64 KB Serial EEPROM

a 32 KB SPI EEPROM

Contents

Main Page Table of Contents Page Section 1 Overview 1.1 Scope 1.2 Deliverables 1.3 The AT91EB42 Evaluation Board Overview 1-2 AT91EB42 Evaluation Board User Guide Page Page Section 3 The On-board Software 3.1 AT91EB42 Evaluation Board 3.2 Boot Software Program 3.3 Programmed Default Memory Mapping 3.4 SRAM Downloader 3.5 Angel Monitor 3.6 Programmed Default Speed Section 4 Circuit Description 4.1 AT91M42800 Processor 4.2 Expansion Connectors and JTAG Interface 4.3 Memories 4.4 Analog-to-digital Converter 4.5 Power and Crystal Quartz 4.6 Push Buttons, LEDs, Reset and Serial Interfaces 4.7 Layout Drawing Page Section 5 Appendix A Configuration Straps 5.1 Configuration Straps (CB1 - 23, JP1 - 8) Appendix A Configuration Straps 5-2 AT91EB42 Evaluation Board User Guide Appendix A Configuration Straps AT91EB42 Evaluation Board User Guide 5-3 5.2 Power Consumption Measurement Strap (JP5) 5.3 Ground Links (JP6) 5.4 Increasing Memory Size Section 6 Appendix B Schematics 6.1 Schematics Page AT91EB42 Evaluation Board User Guide 6-3 Figure 6-2. AT91EB42 Blocks Overview 6-4 AT91EB42 Evaluation Board User Guide Figure 6-3. EBI Memories AT49BV1604-90TC IDT71424S10PH IDT71V424S10Y Page 6-6 AT91EB42 Evaluation Board User Guide Figure 6-5. Push Buttons, LEDs and Serial Interface MAX3223ECAP 74LV244D PA[9..10] AT91EB42 Evaluation Board User Guide 6-7 Figure 6-6. AT91M42800 EBI_[0..42] U11 A[0..19] 6-8 AT91EB42 Evaluation Board User Guide Figure 6-7. Reset and JTAG Interface RST LED CLEAR RESET AT91EB42 Evaluation Board User Guide 6-9 Figure 6-8. Power Supply and Battery Charger Therm sensor on in place only if I Vddcore 6-10 AT91EB42 Evaluation Board User Guide Figure 6-9. Battery Type and Connection AT91EB42 Evaluation Board User Guide 6-11 Figure 6-10. SPI Memories, I2C Memories and SPI ADC Serial EEPROM memory on PIO Data Flash Memory Serial EEPROM memory on SPIA Atmel Headquarters Atmel Operations Corporate Headquarters Europe Asia Japan