DE0-CV User Manual
21
www.terasic.com
May 4, 2015
Status LED
The FPGA development board includes board-specific status LEDs to indicate board status.
Please refer to
Table 3-1
for the description of the LED indicator. Please refer to
Figure 3-4
for
detailed LED location.
Table 3-1 Status LED
Board
Reference
LED Name
Description
D15
3.3-V Power
Illuminates when 3.3-V power is active.
D16
ULED
Illuminates when the on-board USB-Blaster is working
Figure 3-4 Status LED position
3
3
.
.
2
2
U
U
s
s
i
i
n
n
g
g
t
t
h
h
e
e
L
L
E
E
D
D
s
s
a
a
n
n
d
d
S
S
w
w
i
i
t
t
c
c
h
h
e
e
s
s
User-Defined Push-buttons
The board includes four user defined push-buttons and one FPGA reset button that allow users to
interact with the Cyclone V device as shown in
Figure 3-5
. Each of these switches is debounced
using a Schmitt Trigger circuit, as indicated in
Figure 3-6
.
The five outputs called KEY0, KEY1,
