DK-NIOS-2C35N Altera, DK-NIOS-2C35N Datasheet - Page 49

• Manufacturer Part Number: DK-NIOS-2C35N
• Description: NIOS II KIT W/CYCLONE II EP2C35N
• Manufacturer: Altera
• Series: Cyclone® IIr
• Type: Nios®IIr

Specifications of DK-NIOS-2C35N

• Contents: Eval Board, Design Apps, Software, Cables and Accessories
• For Use With/related Products: Cyclone ll 2C35N
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 544-1698; DK-NIOS-2C35N

Altera Corporation
May 2007
Nios II reference design is factory-programmed into the factory
configuration region of the flash memory. In addition, the FPGA can be
configured by the EPCS64 serial configuration device.
Configuration Process
At power-up or reset, the configuration controller attempts to configure
the FPGA with data from one of three sources, in the following order:
1.
2.
3.
First, the configuration controller puts the FPGA in active serial (AS)
configuration mode. The FPGA then attempt to read configuration data
from the EPCS64. If the FPGA finishes configuration successfully, the
configuration controller stops.
If configuration from the EPCS64 does not succeed, the configuration
controller puts the FPGA into passive serial (PS) mode and attempts to
load the user configuration from flash memory. If this also fails (because
the user configuration is either invalid or not present), the configuration
controller attempts to load the factory configuration from flash memory.
When SW9 (Factory Config) is pressed, the configuration controller
ignores the user configuration and EPCS64, and configures the FPGA
with the factory configuration. SW9 provides an escape from a situation
in which a valid-but-nonfunctional design is present in user flash
memory or the EPCS64.
The EPCS64 serial configuration device
The user configuration from flash memory
The factory configuration from flash memory
Reference Manual
Nios Development Board Cyclone II Edition
Board Components
2–37