Digilent Pegasus Board Bedienungsanleitung PDF herunterladen

www.digilentinc.com™

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

(509) 334 6306 Voice and Fax

Overview

The Pegasus circuit board provides a complete

circuit development platform centered on a

Xilinx Spartan 2 FPGA. Pegasus features

include:

• a 50K-gate Xilinx Spartan 2 FPGA with

50K gates and 200MHz operation (a

200K-gate version is also available)

• a XCF01S Xilinx Platform Flash ROM

(XCF02S for 200K gate version)

• a collection of I/O devices including eight

LEDs, four-digit seven-segment display,

four pushbuttons, and eight slide

switches

• a 50MHz oscillator and a socket for a

second oscillator

• PS/2 and VGA ports

• 96 I/O signals routed to three standard

40-pin expansion connectors

• all I/O signals have ESD and short-circuit

protection

• a JTAG programming port.

The Pegasus board has been designed to

work seamlessly with all versions of the Xilinx

ISE CAD tools, including the free WebPack

tools available from Xilinx. A growing collection

of low-cost expansion boards can be used with

the Pegasus board to add analog and digital

I/O capabilities, as well as various data ports

like Ethernet and USB. The Pegasus board

ships with a power supply and programming

cable, so designs can be implemented

immediately without the need for any additional

hardware.

Important: This reference manual is

updated for Rev. D Pegasus Boards with a

5V power supply. For a manual for a

previous Pegasus board using a 3.3V

power supply, e-mail

[email protected]

Functional Description

The Pegasus board provides an inexpensive,

robust, and easy-to-use platform that anyone

can use to gain experience with FPGA devices

and modern design methods. The Pegasus

board is centered on the Spartan 2 FPGA, and

it contains all needed support circuits so

designs can get up and running quickly. The

large collection of on-board I/O devices allows

many designs to be completed without the

need for any other components. Three

standard expansion connectors allow designs

to grow beyond the Pegasus board, either with

user-designed boards or any one of several

analog and digital I/O boards offered by

Digilent. Each expansion connector provides

system voltages and 32 unique I/O signals,

with all I/O signals protected against damage

from ESD and short-circuit connections. JTAG

signals are routed to two expansion

connectors, allowing peripheral boards to drive

the scan chain or to be configured along with

the Spartan FPGA. The collection of on-board

I/O devices and signal protection networks

make the Pegasus board ideally suited to

educational settings.

Xilinx Spartan2 XC2S50-PQ208

Clock

(50MHz)

Power

jack

5-9VDC

2.5VDC

regulator

Config

ROM

3.3VDC

regulator

JTAG

8 switches

4 buttons

8 LEDs

4 7-seg.

displays

PS2

Port

VGA

Port

Expansion Connectors

Figure 1. Pegasus circuit board block diagram

1 2 3 4 5 6 ... 11 12

Inhaltsverzeichnis

Seite 1 - Xilinx Spartan2 XC2S50-PQ208

DDiiggiilleenntt PPeeggaassuuss BBooaarrdd RReeffeerreennccee MMaannuuaall www.digilentinc.com™ Revision: August 11, 2005 215 E Main Suite D |

Seite 2

Pegasus Reference Manual Digilent, Inc. ™ www.digilentinc.com Page 10 TwThOECSWEDB0-DB7ThTeoeTsuTdoeTenRead data latch timeCSTdoeTeoeOEWEThD

Seite 3

Pegasus Reference Manual Digilent, Inc. ™ www.digilentinc.com Page 11 Pegasus Expansion Connector Pinout Connector B1 Connector

Seite 4 - Figure 8. PS/2 connections

Pegasus Reference Manual Digilent, Inc. ™ www.digilentinc.com Page 12 Pegasus FPGA Pin Assignments Pin Function Pin Function Pin Functio

Seite 5 - Figure 9. PS/2 timings

Pegasus Reference Manual Digilent, Inc. ™ www.digilentinc.com Page 2 JTAG Ports and Device Configuration The Spartan 2 FPGA, the XCF01S Plat

Seite 6 - Figure 10. PS/2 mouse data

Pegasus Reference Manual Digilent, Inc. ™ www.digilentinc.com Page 3 The primary oscillator is connected to the GLK1 input of the Spartan 2 (pin

Seite 7 - R,G,B signals (to guns)

Pegasus Reference Manual Digilent, Inc. ™ www.digilentinc.com Page 4 a repeating, continuous succession can create the appearance of a four-digi

Seite 8

Pegasus Reference Manual Digilent, Inc. ™ www.digilentinc.com Page 5 570ms). When releasing a key that was pressed for more than 570ms, an “F0”

Seite 9

Pegasus Reference Manual Digilent, Inc. ™ www.digilentinc.com Page 6 L R 0 1 XS YS XY YY P X0 X1 X2 X3 X4 X5 X6 X7 P Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 P1

Seite 10 - Read Cycle

Pegasus Reference Manual Digilent, Inc. ™ www.digilentinc.com Page 7 The electrostatic force imposed by the grid pulls away rays of energized el

Seite 11

Pegasus Reference Manual Digilent, Inc. ™ www.digilentinc.com Page 8 Horizontal CounterZeroDetect3.84usDetectHorizontalSynchSetResetTSTdispTpwTf

Seite 12

Pegasus Reference Manual Digilent, Inc. ™ www.digilentinc.com Page 9 Pin 1: GNDPin 2: VUPin 3: 3.3VPin 4Pin 39Pin 40 Figure 7. Expansion Connec

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