Altera Corporation 27
Nios Development Board Reference Manual, Cyclone Edition Board Components
Individual LEDs
This Nios development board provides eight individual LEDs connected
to the Cyclone device. See Figure 17 on page 27. D0 – D7 are connected to
general purpose I/O pins on the Cyclone device as shown in Table 8.
When the Cyclone pin drives logic 1, the corresponding LED turns on.
Figure 17. SW0 – SW3 Push Button Switches and Individual LEDs
Serial
Configuration
Device (EPCS4)
Serial configuration devices are flash memory devices with a serial
interface that can store configuration data for a Cyclone device and reload
the data to the device upon power-up or re-configuration. With the new
data-decompression feature in the Cyclone FPGA family, designers can
use smaller serial configuration devices to configure larger Cyclone
FPGAs. Serial configuration devices cannot be cascaded.
The SOPC Builder active serial memory interface component allows
microprocessor systems access to serial configuration memory.
Serial Flash
Connector
The serial flash connector logic is designed strictly for an EPCS4 serial
configuration device connection. Hardware designers will never need the
serial flash connector for using the reference designs that came with the
Nios development kit. The reference designs allow the designer to access
data from the serial configuration device without using this connector. See
“Cyclone Configuration” on page 28.
1 The ByteBlaster II download cable is required when using the
serial flash connector for connecting to the EPCS4 serial
configuration device.
f
See the Serial Configuration Devices (EPCS1 & EPCS4) Data Sheet at for more
information about this device and the Active Serial Memory Interface Data
Sheet for information about the active serial memory interface component
in SOPC Builder.
Table 8. LED Pin Out Table
LED
D0 D1 D2 D3 D4 D5 D6 D7
Cyclone Pin E14 E13 C14 D14 E12 F12 B3 B14
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