Stratix II EP2S60 DSP Development Board Data Sheet
Configuration-Status LEDs
The configuration controller is connected to four status LEDs that show
the configuration status of the board at a glance. You can tell which
configuration, if any, was loaded into the FPGA at power-on by looking
at the LEDs. 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 8 shows the behavior of the configuration-status LEDs.
Table 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
LED1
LED2
Error
Red
If the red Error LED is on, then configuration was not transferred from flash
memory into the Stratix II device. This can happen if, for example, the flash
memory contains neither a valid user or factory configuration.
User
Green
Amber
This LED turns on 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.
Factory
This LED turns on 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.
Dual Seven-Segment Display & LEDs
A dual seven-segment display and two LEDs are provided. The segments
illuminate if the Stratix II pin to which they are connected drives low.
They appear unlit when the connected Stratix II device pin drives high.
The LEDs illuminate if the connected Stratix II device pin drives high, and
are unlit when the connected Stratix II device pin drives low.
Table 9 shows the pin-outs for the seven-segment display and LEDs.
Table 9. Seven-Segment Display & LED Pin-Outs (Part 1 of 2)
Signal
Stratix II Pin
Dual Seven-Segment Display
HEX_0A
HEX_0B
HEX_0C
C4
C5
B5
18
Preliminary
Altera Corporation
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