Atmel AT91EB40A User Manual
AT91EB40A Evaluation Board
..............................................................................................
User Guide
Table of Contents
Section 1
Overview...............................................................................................1-1
1.1 Scope........................................................................................................1-1
1.2 Deliverables ..............................................................................................1-1
1.3 The AT91EB40A Evaluation Board...........................................................1-2
Section 2
Setting Up the AT91EB40A Evaluation Board...................................... 2-1
2.1 Electrostatic Warning ................................................................................2-1
2.2 Requirements............................................................................................2-1
2.3 Layout .......................................................................................................2-1
2.4 Jumper Settings ........................................................................................2-2
2.5 Powering Up the Board.............................................................................2-2
2.6 Measuring Current Consumption on the AT91R40008.............................2-2
Section 3
The On-board Software ........................................................................3-1
3.1 The AT91EB40A Evaluation Board...........................................................3-1
3.2 Boot Software Program.............................................................................3-1
3.3 Programmed Default Memory Mapping....................................................3-2
3.4 Flash Uploader..........................................................................................3-2
3.5 Angel Monitor............................................................................................3-3
Section 4
Circuit Description................................................................................. 4-1
4.1 AT91R40008 Processor............................................................................4-1
4.2 Expansion Connectors ..............................................................................4-1
4.3 Memories ..................................................................................................4-1
4.4 Power and Crystal Quartz .........................................................................4-2
4.5 Push-buttons, LEDs and Serial Interfaces ................................................4-2
4.6 Reset Circuit and JTAG Interface .............................................................4-2
4.7 Layout Drawing .........................................................................................4-3
Section 5
Appendix A – Configuration Straps....................................................... 5-1
5.1 Configuration Straps .................................................................................5-1
5.2 Power Consumption Measurement Straps (JP5A/B, JP7A/B)..................5-3
5.3 Ground Links (JP6) ...................................................................................5-3
5.4 Increasing Memory Size ...........................................................................5-4
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Section 6
Appendix B – Schematics.....................................................................6-1
6.1 Schematics ...............................................................................................6-1
Section 7
Appendix C – Bill of Materials............................................................... 7-1
Section 8
Appendix D – Flash Memory Mapping.................................................. 8-1
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Section 1
Overview
1.1 Scope The AT91EB40A Evaluation Board enables real-time code development and evaluation.
It supports the AT91R40008.
This guide focuses on the AT91EB40A 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 describes the configuration straps.
! Section 6 shows board schematics.
! Section 7 is the bill of materials for the EB40A.
! Section 8 presents the memory mapping of the on-board software.
1.2 Deliverables The evaluation board is delivered with a DB9 plug-to-DB9 socket straight-through serial
cable to connect the target evaluation board to a PC. A bare power 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 several CD-ROMs:
! The AT91 CD-ROM contains summary and full datasheets, datasheets with electrical
and mechanical characteristics, application notes and Getting Started documents for
all evaluation boards and AT91 microcontrollers. An AT91 C Library with prooject
examples is also provided. This allows the user to begin evaluating the AT91 ARM
Thumb 32-bit microcontroller quickly.
! Third-party evaluation version of Development and Debugging Tools (compiler,
assembler, linker, debugger). Note that evaluation version CD-ROMs from third-party
suppliers are subject to change.
The evaluation board is capable of supporting different kinds of debugging systems,
using an ICE interface or the on-board Angel
™
Debug Monitor.
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1.3 The AT91EB40A Evaluation Board
The board consists of an AT91R40008 together with several peripherals:
! Two serial ports
! Reset push button
! An indicator that memorizes a reset appearance
! Four user-defined push buttons
! Eight LEDs
! A footprint of a 256-KB 16-bit SRAM (upgradeable to 1M byte)
! 2-MB 16-bit Flash (of which 1M byte is available for user software)
! A footprint of an extra Flash memory
! 2 x 32-pin EBI expansion connectors
! 2 x 32-pin I/O expansion connectors
! 20-pin JTAG interface connector
If required, user-defined peripherals can also be added to the board. See Section 5 for
details.
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Figure 1-1. AT91EB40A Evaluation Board Block Diagram
AT91R40008
Reset
Controller
JTAG
ICE
Connector
ARM7TDMI
Processor
256K Byte
RAM
ASB
EBI
SRAM
(1)
Flash
EBI
Expansion
Connector
66 MHz
Crystal
Push-buttons
Power Supply
VDDCORE (1.8V)
VDDIO (3.3V)
Clock
Generator
Interrupt
Controller
PIO
APB
AMBA
Bridge
PIO
Timer
Counters
Serial
Ports
LEDs
RS232
Transceivers
I/O
Expansion
Connector
DB9 Serial
Connectors
Note: No external SRAM is fitted on the board. See section “Memories” on page 4-1 for more details.
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Section 2
Setting Up the
AT91EB40A Evaluation Board
2.1 Electrostatic Warning
2.2 Requirements In order to set up the AT91EB40A evaluation board, the following requirements are
2.3 Layout Figure 2-1 shows the layout of the AT91EB40A evaluation board.
The AT91EB40A evaluation board is shipped in protective anti-static packaging. The
board must not be subjected to high electrostatic potentials. A grounding strap or similar
protective device should be worn when handling the board. Avoid touching the component pins or any other metallic element.
needed:
! The AT91EB40A evaluation board itself.
! The DC power supply capable of supplying 7V to 9V at 1A (not supplied).
Figure 2-1. Layout of the AT91EB40A Evaluation Board
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2.4 Jumper Settings JP1 is used to boot standard or user programs. For standard operations, set it in the
STD position; for user programs, set it to the USER position.
CB2 is used to select the core power supply between 1.8V and 3.3V.
For more information on the CB2 setting, see “Configuration Straps” on page 5-1 in Section 5.
2.5 Powering Up the Board
2.6 Measuring Current Consumption on the AT91R40008
DC power is supplied to the board via the 2.1 mm socket (J1) shown in Figure 2-2. The
polarity of the power supply is not critical. The minimum voltage required is 7V.
Figure 2-2. 2.1 mm Socket
positive (+)
or
negative (-)
2.1 mm Connector
The board has a voltage regulator providing +3.3V and 1.8V. The regulator allows the
input voltage to range from 7V to 9V. When you switch the power on, the red LED D11
marked PWR lights up. If it does not, switch off and check the power supply
connections.
The board is designed to generate the power for the AT91 product, and only the AT91
product, through the jumpers JP5A/JP5B (V
ture enables the current consumption of the AT91 product to be measured.
See “Power Consumption Measurement Straps (JP5A/B, JP7A/B)” on page 5-3 in Section 5 for further details.
) and JP7A/JP7B (V
DDIO
DDCORE
). This fea-
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2.7 Testing the AT91EB40A Evaluation Board
To test the AT91EB40A Evaluation Board, perform the following procedure:
1. Hold down the SW1 button and power-up the board, or generate a reset and wait
for the light sequence on each LED to complete. All the LEDs light.
2. Release the SW1 button. The LEDs D1 to D5 light up in sequential order. If all
the LEDs light up twice, this indicates an error. Note that LEDs D6 to D8 are
reserved for future use.
The LEDs represent the following test functions:
! D1 for the internal SRAM
! D2 for the external SRAM
(1)
! D3 for the external Flash
! D5 for the USART
! D6 reserved
! D7 reserved
! D8 reserved
During a complete test cycle, each LED flashes once to inform the user that the corresponding function has been successfully tested. If an error is detected, all the LEDs will
light up twice. After a complete test cycle, the embedded self-test software called FTS
(Functional Test Software) restarts a new cycle.
Note: 1. At factory, no external SRAM is mounted on the board. The test shows an error. If the
user upgrades the board with external SRAM, the test runs normally.
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Section 3
The On-board Software
3.1 The AT91EB40A Evaluation Board
3.2 Boot Software Program
The AT91EB40A Evaluation Board embeds an AT49BV1604 or AT49BV1614 Flash
memory device programmed with default software.
When delivered, the Flash memory device contains:
! the Boot Software Program
! the Functional Test Software (FTS)
! the Flash uploader
! the Angel Debug Monitor
! a default user boot with a default application (LED Swing Application)
The boot software program, functional test software (FTS), and the Flash downloader
are in sectors 0 and 1 of the Flash device. Sectors 3 to 8 support the Angel Debug Monitor. The default user boot with a default application is located in sector 24.
These sectors are not locked in order to provide an easy on-board upgrade. The user
must avoid overwriting these sectors. The remaining sectors are user definable, and can
be programmed using one of the Flash downloader "Flash_16x4" solutions offered in
the AT91 library. See “Appendix D – Flash Memory Mapping” on page 8-1 for further
details.
The boot software program configures the AT91R40008, and thus controls the memory
and other board components.
The boot software program is started at reset if JP1 is in the STD position. If JP1 is in
the USER position, the AT91R40008 boots from address 0x01100000 in the Flash,
which must have a user-defined boot.
The boot software program first initializes the EBI, then executes the REMAP procedure
and, finally, checks the state of the buttons as described below.
! When the SW1 button is pressed:
All the LEDs light up together.
The D1 LED remains lit when SW1 is released.
The Functional Test Software (FTS) is started.
! The SW2 button is reserved.
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