Digilent XCRP Manual do Utilizador descarregar pdf

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Revision: 04/12/05

215 E Main Suite D | Pullman, WA 99163

(509) 334 6306 Voice and Fax

Doc: 502-021 page 1 of 1

Overview

The Digilab XCRP circuit board, built around

the Xilinx CoolRunner XC3064 CPLD, provides

a very low cost platform that can be used to

implement a wide variety of digital circuits,

from complex combinational devices to

sequential machines and controllers. The

XCRP board provides an ideal platform for new

engineers requiring experience with basic

digital design techniques, as well as those

needing exposure to Xilinx CAD tools and

CPLD devices. XCRP board features include:

• A socketed Xilinx XCR3064 CPLD

• Non-volatility – designs remain in the CPLD

after power is removed

• On board voltage regulator for use with a

wall-plug transformer, or the board can run

more than 60hrs on 2 AA cells (typical)

• Expandability –an integral solderless

breadboard allows expansion circuits to be

constructed right on the XCRP board

• Four debounced buttons

• Eight slide switches

• Eight LEDs in three colors (red, green, and

yellow)

• 40-pin expansion connector

• JTAG programming using a standard

parallel cable (included)

• Two high-bright seven segment displays

• An user-adjustable oscillator circuit

(approximately 0.5Hz to 4KHz).

The XCRP board makes an excellent platform

for instructional-lab based work: it is fully

compatible with all versions of the Xilinx CAD

tools, including the free WebPack tools

available at the Xilinx website; the included

CPLD uses non-volatile configuration memory,

so designs can be completed outside the lab;

and the board ships with a programming cable

and a power source, so designs can be

implemented immediately without the need for

any additional hardware.

Functional description

The XCRP board has been designed to offer a

low-cost system for designers who need a

flexible platform to gain exposure to the basics

of digital design or to CPLD devices. The

XCRP board provides sufficient I/O devices so

that many interesting circuits can be

implemented without the need for any other

Expansion

Connector

Solderless

breadboard

XCR3064XL CoolRunner

CPLD PC-44 (socketed)

Power

jack

5-9VDC

3.3VDC

regulator

2 AA

cells

Vcc

Adjustable clock

(0.5Hz to 4KHz)

2 7-seg.

displays

8 switches

8 LEDs

4 buttons

Debounce

JTAG

Port

XCRP Circuit Diagram

1 2 3 4 5

Resumo do Conteúdo

Página 1 - Functional description

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Página 2 - Figure 2. Oscillator Circuit

XCRP Reference Manual Digilent, Inc. Copyright Digilent, Inc. Page 2/2 Doc: 502-046 devices. All CPLD signals are routed to an expansi

Página 3 - To CPLD &

XCRP Reference Manual Digilent, Inc. Copyright Digilent, Inc. Page 3/3 Doc: 502-046 consumes less than 80mA with all LEDs and LED segm

Página 4 - CAT1 CAT2

XCRP Reference Manual Digilent, Inc. Copyright Digilent, Inc. Page 4/4 Doc: 502-046 phenomenon is used by all multiplexed displays, in

Página 5

XCRP Reference Manual Digilent, Inc. Copyright Digilent, Inc. Page 5/5 Doc: 502-046 Expansion connector An expansion connector labele

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