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DE10-Standard
User Manual
24
www.terasic.com
January 19, 2017
as switch debounce in
Figure 3-15
for the push-buttons connected. The four push-buttons named
KEY0, KEY1, KEY2, and KEY3 coming out of the Schmitt trigger device are connected directly to
the Cyclone V SoC FPGA. The push-button generates a low logic level or high logic level when it
is pressed or not, respectively. Since the push-buttons are debounced, they can be used as clock or
reset inputs in a circuit.
Figure 3-14 Connections between the push-buttons and the Cyclone V SoC FPGA
Pushbutton released
Pushbutton depressed
Before
Debouncing
Schmitt Trigger
Debounced
Figure 3-15 Switch debouncing
There are ten slide switches connected to the FPGA, as shown in
Figure 3-16
. These switches are
not debounced and to be used as level-sensitive data inputs to a circuit. Each switch is connected
directly and individually to the FPGA. When the switch is set to the DOWN position (towards the
edge of the board), it generates a low logic level to the FPGA. When the switch is set to the UP
position, a high logic level is generated to the FPGA
Содержание DE10-Standard
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Страница 105: ...DE10 Standard User Manual 104 www terasic com January 19 2017 Figure 6 14 LCD display for the LCD Demonstration ...
Страница 121: ...DE10 Standard User Manual 120 www terasic com January 19 2017 Figure 8 4 Select Devices page ...