Digilent DIO5 Manual do Utilizador descarregar pdf

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Revision: August 11, 2005 215 E Main Suite D | Pullman, WA 99163

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Overview

The DIO5 circuit board provides a ready-made

source for many common I/O devices found in

digital systems. It can be connected to Digilent

system boards to create a digital development

platform that is suitable for a wide range of

projects. The DIO5 uses a Xilinx CoolRunner

CPLD to facilitate interaction with system

boards. The CLPD automatically appears in

the JTAG scan chain when the DIO5 is

attached to a system board, so new designs

can easily be configured into the DIO5. DIO5

features include:

• A Xilinx CoolRunner XCR3128 CPLD for

I/O device and system bus control;

• A 16x2 character LCD module;

• A 4-digit seven segment LED display;

• 16 LEDs in three different colors;

• A 16 button keypad;

• 8 slide switches;

• 3-bit VGA port;

• PS/2 mouse or keyboard port.

The DIO5 has been designed to work

seamlessly with Digilent system boards and all

versions of the Xilinx ISE CAD tools, including

the free WebPack tools available from Xilinx.

The CPLD on the DIO5 is configured during

manufacturing with the project shown in

Appendix 1, but new designs can easily be

loaded into the CPLD.

Functional Description

The Digilab DIO5 can be attached to any

Digilent system board to create a digital design

platform that has many useful I/O devices. The

DIO5 draws power from the system board, so

no separate power supply is required. All I/O

device signals are routed through the on-board

CPLD so that a customized I/O controller can

be created for any given design. For example,

if all on-board I/O devices are needed, a

Or, if only a subset of I/O devices are needed,

a much simpler controller can be used to map

device signals directly through the CPLD to the

system board. Because the CPLD appears in

the JTAG scan chain when the DIO5 is

attached to a system board, it can easily be

configured. The CPLD is programmed during

manufacture with register-based controller

shown in Appendix 1.

Power Supplies

The DIO5 board draws power from three pins

on the 40-pin connectors: pin 37 supplies 3.3V;

pin 39 provides system GND, and pin 40

supplies unregulated voltage (VU). Pin 40 (VU)

is connected directly to an LM1117 5VDC LDO

regulator on the DIO5. 5VDC is used by the

LCD display and the PS/2 interface. The 3.3V

JTAG

Connector P2Connector P1

8 switches

XCR3128XL CoolRunner CPLD

TQ-144

System Bus

16 button

keypad

16 LEDs

4 7-seg.

displays

16x2

LCD

PS2

Port

Clock

Uncomitted I/O

VGA

Port

DIO5 circuit board block diagram

1 2 3 4 5 6 ... 18 19

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Página 3 - Read Cycle

Página 4 - 16 x 2 character LCD

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Página 8 - LD# signal

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Página 11 - R,G,B signals (to guns)

Página 12 - VGA display

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Digilent DIO5 Manual do Utilizador

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