Leds - Altera Cyclone III FPGA Reference Manual

Interfaces
Figure 2–5. Push Buttons
2–14
Cyclone III FPGA Starter Board
Figure 2–5 shows the push buttons.
System Reset Push Buttons
The system reset push button is used to force a re-configuration of the
FPGA from flash memory.
User Reset Push Buttons
The user reset push button is an input to the Cyclone III device. It is
intended to be the master reset signal for the FPGA designs loaded into
the Cyclone III device. The user reset push button is connected to the
DEV_CLRn pin on the FPGA. The DEV_CLRn setting is a pin option in the
Quartus II software that you must enable to function as DEV_CLRn
instead of a standard I/O.
User Push Buttons
The four user push buttons are intended for use in controlling FPGA
designs loaded into the Cyclone III device. There is no board-specific
function for these four push buttons.

LEDs

The board has user LEDs and board-specific LEDs.
user and board-specific LED pinout. A logic "0" causes the LEDs to
illuminate.
Table 2–11. Board LED Pinout (Part 1 of 2)
Signal Name
LED0
LED1
LED2
LED3
Power LED
Reference Manual
FPGA Pin Name Direction
P13 Output
P12 Output
N12 Output
N9 Output
N/A N/A
Table 2–11 lists both
Type
2.5 V
2.5 V
2.5 V
2.5 V
N/A
Altera Corporation
October 2007