Altera Stratix II EP2S180 DSP Development Board - Manual (Page 22)

2–14 Core Version a.b.c variable Altera Corporation
Stratix II EP2S180 DSP Development Board Reference Manual
Board Components
Table 2–7 shows the pin-outs for the push-button switches.
Configuration Status LEDs
The configuration controller is connected to four status LEDs that show
the configuration status of the board at a glance. By looking at the LEDs,
you can determine which configuration, if any, was loaded into the FPGA
at power-on. If a new configuration is downloaded into the Stratix II
device via the JTAG interface, then the USER LED (LED1) remains
illuminated. The rest of the configuration status LEDs turn off if the
unused pins are configured as inputs, tri-stated for the Stratix II device.
Table 2–8 shows the behavior of the configuration status LEDs.
Dual 7-Segment Display & LEDs
A dual 7-segment display and two LEDs is provided. The segments
illuminate if the Stratix II pin to which they are connected drives low. The
segemnts are not illuminated when the connected Stratix II device pin
Table 2–7. Push-button Switch Pin-
Outs
Signal Name Stratix II Pin
SW4 K14
SW5 J15
SW6 L13
SW7 J13
Table 2–8. Configuration Status LED Indicators
LED LED Name Color Description
LED3 Loading Green This LED blinks while the configuration controller is actively transferring
data from flash memory into the Stratix II FPGA.
LED4 Error Red If the red Error LED is illuminated, then configuration was not transferred
from flash memory into the Stratix II device. This can happen, if the flash
memory contains neither a valid user or factory configuration.
LED1 User Green This LED illuminates when the user configuration is being transferred from
flash memory and stays illuminated when the user configuration data is
successfully loaded into the Stratix II device.
LED2 Factory Amber This LED illuminates when the factory configuration is being transferred
from flash memory and stays illuminated if the factory configuration was
successfully loaded into the Stratix II device.