Altera Nios Development Board Manuel d'utilisateur télécharger pdf (Page 27)

Altera Corporation 1–19

December 2004 Nios Development Board Reference Manual, Cyclone Edition

Board Components

Push-Button

Switches

SW0 – SW3 are momentary-contact push-button switches that provide

stimulus to designs in the Cyclone device. See Figure 1–17. Each switch is

connected to an Cyclone general-purpose I/O pin with a pull-up resistor

as shown in Ta ble 1 –4 . The Cyclone device pin will see a logic 0 when

each switch is pressed.

Individual LEDs

This Nios development board provides eight individual LEDs connected

to the Cyclone device. See Figure 1–17. D0 – D7 are connected to general

purpose I/O pins on the Cyclone device as shown in Tab le 1– 5. When the

Cyclone pin drives logic 1, the corresponding LED turns on.

Figure 1–17. SW0 – SW3 Push Button Switches and Individual LEDs

Serial Flash

Connector

The serial flash connector (J28) connects to the EPCS4 serial configuration

device and allows designers to program the EPCS4 using the Quartus II

software. Hardware designers do not need the serial flash connector for

using the reference designs that came with the Nios II development kit.

The reference designs allow the designer to access data from the EPCS4

device without using this connector. See “Cyclone Configuration” on

page 1–21.

Table 1–4. Push Button Switches Pin Out Table

Button

SW0 SW1 SW2 SW3

Cyclone Pin W3 Y4 V4 W4

Table 1–5. LED Pin Out Table

LED

D0 D1 D2 D3 D4 D5 D6 D7

Cyclone Pin E14 E13 C14 D14 E12 F12 B3 B14

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 53 54

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Altera Nios Development Board Manuel d'utilisateur Page 27