Altera Stratix IV E FPGA Development Board Manual do Utilizador descarregar pdf (Página 32)

2–24 Chapter 2: Board Components

General User Input/Output

Stratix IV E FPGA Development Board Reference Manual May 2011 Altera Corporation

Table 2–23 lists the crystal oscillators component references and manufacturing

information.

General User Input/Output

This section describes the user I/O interface to the FPGA, including the push-buttons,

DIP switches, and LCD displays.

User-Defined Push-Button Switches

The development board includes four user-defined push-button switches. For

information on the board specific push-button switches, refer to “Setup Elements” on

page 2–17.

Board references S6 to S9 are push-button switches that allow you to interact with the

Stratix IV E device. When the switch is pressed and held down, the device pin is set to

logic 0; when the switch is released, the device pin is set to logic 1. There is no

board-specific function for these general user push-button switches.

50 MHz CLKIN_50 X5.3 U19.V33 and U10.J12

6.000 MHz USB_XTAL Y1 U7.27 and U7.28 (USB PHY, FT245BL)

24 MHz CLKIN_24MHZ Y3 U8.E1 (Embedded USB-Blaster, EPM240M100)

100.00 MHz CLKIN_MAX_100 Y2.3 U10.H12 (MAX II CPLD EPM2210 System Controller)

25 MHz ENET_XTAL_25MHZ X1 U15.55 (Ethernet PHY, Marvell 88E1111 PHY)

Table 2–22. Stratix IV E FPGA Development Board Clock Distribution (Part 2 of 2)

Frequency Schematic Signal Name Signal Originates From Signal Propagates To

Table 2–23. Crystal Oscillator Component References and Manufacturing Information

Board

Reference

Description Manufacturer

Manufacturer

Part Number

Manufacturer Website

Y1 6 MHz Crystal Oscillator Abracon Corporation ABL-6.000MHZ-B2 www.abracon.com

25 MHz Crystal Oscillator,

LVCMOS/LVTTL

ECS, Inc. ECS-3953C-250-B www.ecsxtal.com

50 MHz Oscillator, 2.5 V, clock

oscillator, SMD

ECS, Inc. ECS-3525-500-B-xx www.ecsxtal.com

100 MHz Oscillator, 1.8 V,

CMOS clock oscillator, SMD

Pletronics SM5545TEX-100.00M www.pletronics.com

125 MHz Crystal Oscillator,

2.5 V, LVDS

Epson

EG-2121CA

125.0000M-LGPNL3

www.eea.epson.com

24 MHz Oscillator, 3.3 V,

CMOS clock oscillator, SMD

Pletronics SM5545TEV-24.0M www.pletronics.com

100 MHz Crystal Oscillator,

2.5 V, LVDS

Epson

EG-2121CA

100.0000M-LHPNL3

www.eea.epson.com

X3 66 MHz Crystal Oscillator ECS, Inc. ECS-3953C-666-X www.ecsxtal.com

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