iii
Table of Contents
Section 1
Overview............................................................................................... 1-1
1.1
Scope ........................................................................................................1-1
1.2
Deliverables ..............................................................................................1-1
1.3
The AT91EB55 Evaluation Board .............................................................1-1
Section 2
Setting Up the AT91EB55 Evaluation Board ........................................ 2-1
2.1
Electrostatic Warning ................................................................................2-1
2.2
Requirements............................................................................................2-1
2.3
Layout .......................................................................................................2-1
2.4
Jumper Settings ........................................................................................2-3
2.5
Powering Up the Board .............................................................................2-3
2.6
Measuring Current Consumption on the AT91M55800A ..........................2-3
2.7
Testing the AT91EB55 Evaluation Board .................................................2-4
Section 3
The On-board Software ........................................................................ 3-1
3.1
AT91EB55 Evaluation Board ....................................................................3-1
3.2
The Boot Software Program .....................................................................3-1
3.3
Programmed Default Memory Mapping ....................................................3-2
3.4
The SRAM Downloader ............................................................................3-2
3.5
The Angel Debug Monitor .........................................................................3-2
Section 4
Circuit Description................................................................................. 4-1
4.1
AT91M55800A Processor .........................................................................4-1
4.2
Expansion Connectors and JTAG Interface..............................................4-1
4.2.1
I/O Expansion Connector ...................................................................4-1
4.2.2
EBI Expansion Connector ..................................................................4-1
4.2.3
JTAG Interface ...................................................................................4-2
4.3
Memories ..................................................................................................4-2
4.4
ADC and DAC Peripheral Connections ....................................................4-2
4.5
Power and Crystal Quartz .........................................................................4-2
4.6
Push Buttons, LEDs, Reset and Serial Interface ......................................4-3
4.7
Layout Drawing .........................................................................................4-3
Table of Contents
iv
Section 5
Appendix A Configuration Straps....................................................... 5-1
5.1
Configuration Straps (CB1 15, JP1 9).................................................5-1
5.2
Power Consumption Measurement Straps (JP5, JP9) .............................5-4
5.3
Ground Links (JP6) ...................................................................................5-4
5.4
Increasing Memory Size ...........................................................................5-5
Section 6
Appendix B Schematics..................................................................... 6-1
6.1
Schematics ...............................................................................................6-1
Section 7
Appendix C Bill of Material ................................................................ 7-1
Section 8
Appendix D Flash Memory ................................................................ 8-1
AT91EB55 Evaluation Board User Guide
1-1
Section 1
Overview
1.1
Scope
The AT91EB55 Evaluation Board enables real-time code development and evaluation.
It supports the AT91M55800A.
This user guide focuses on the AT91 Evaluation Board as an evaluation and demonstra-
tion platform:
Section 1 provides an overview.
Section 2 describes how to setup the evaluation board.
Section 3 describes the on-board software.
Section 4 contains a description of the circuit board.
Appendixes A and B cover configuration straps and schematics including pin
connectors.
1.2
Deliverables
The evaluation board is supplied with a DB9 plug to DB9 socket straight through serial
cable to connect the target evaluation board to a PC. There is also a bare power lead
with a 2.1 mm jack on one end for connection to a bench power supply.
The evaluation board is also delivered with a CD-ROM that contains an evaluation ver-
sion of 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
TM
Debug Monitor. Refer to the EB55 "Get-
ting Started" tutorial documents for recommendations on using the evaluation board in a
full debugging environment.
1.3
The AT91EB55
Evaluation Board
The board consists of an AT91M55800A, together with several peripherals:
Two serial ports
Reset push button
An indicator which memorizes a reset appearance
Memory clear for the reset indicator
Four user-defined push buttons
Eight LEDs
256K byte of 16-bit SRAM (upgradable to 1 MB)
2M bytes of 16-bit Flash (of which 1 MB is available for user software)
4M bytes of Serial Data Flash (upgradeable to 16 MB)
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