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PDF AT91EB55 Data sheet ( Hoja de datos )
| Número de pieza | AT91EB55 | |
| Descripción | AT91EB55 Evaluation Board | |
| Fabricantes | ATMEL Corporation | |
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AT91EB55
Evaluation Board
.............................................................................
User Guide
1 page  
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™ 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 The board consists of an AT91M55800A, together with several peripherals:
Evaluation Board 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)
AT91EB55 Evaluation Board User Guide
1-1
5 Page 
Section 4
Circuit Description
4.1
4.2
4.2.1
4.2.2
4.2.3
AT91M55800A
Processor
Figure 1 in “Appendix B – Schematics” shows the AT91M55800A. The footprint is for a
176-pin TQFP package.
Strap CB15 enables the user to choose between the standard ICE debug mode and the
JTAG boundary scan mode of operation.
The operating mode is defined by the state of the JTAGSEL input detected at reset.
Jumper JP5 can be removed by the user to allow measurement of the current demand
by the whole microcontroller (VDDIO and VDDCORE). Jumper JP8 can be removed to mea-
sure the core microcontroller consumption (VDDCORE). See Figure 8 in “Appendix B –
Schematics.”
Jumper JP9 can be removed by the user to allow measurement of the current demand
by the APMC and RTC microcontroller modules (VDDBU). See Figure 8 in “Appendix B –
Schematics.”
Expansion
Connectors and
JTAG Interface
I/O Expansion
Connector
EBI Expansion
Connector
JTAG Interface
The two expansion connectors (I/O expansion connector and EBI expansion connector)
and the JTAG Interface are described below.
The I/O and EBI expansion connectors pin-outs and positions are compatible with the
other evaluation boards (except for the I/O expansion connector pin-out and position of
the EB40) so that users can connect their prototype daughter boards to any of these
evaluation boards. For the I/O expansion connector, rows A and B are position and
pinout compatible.
The I/O expansion connector makes the general purpose I/O (GPIO) lines, VCC3V3 and
Ground available to the user. Configuration straps CB2, CB3, CB4, CB5, CB6, CB13,
CB14 and CB17 are used to select between the I/O lines being used by the evaluation
board or by the user via the I/O expansion connector. The connector is not fitted at the
factory; however, the user can fit any 32 x 3 connector on a 0.1" (2.54 mm) pitch.
The schematic illustrated in Figure 4 in "Appendix B - Schematics" also shows the Bus
expansion connector, which, like the I/O expansion connector, is not fitted at the factory.
The user can fit any 32 x 2 connector on a 0.1" (2.54 mm) pitch to gain access to the
data, address, chip select, read/write, oscillator output and wait request pins. VCC3V3
and Ground are also available on this connector. Configuration strap CB1, when open,
allows the user to connect the EBI expansion connector to the MPI expansion connector
of an AT91EB63 evaluation board without fearing any conflict problem.
An ARM-standard 20-pin box header (P5) is provided to enable connection of an ICE to
the JTAG inputs on the AT91. This allows code to be developed on the board without
using system resources such as memory and serial ports.
AT91EB55 Evaluation Board User Guide
4-1
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet AT91EB55.PDF ] | |
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