Terasic T-Core, Руководство пользователя

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T-Core
User Manual 16 www.terasic.com
January 14, 2020
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◼
User-Defined Push-buttons
The board includes two user defined push-buttons that allow users to interact with the MAX 10
FPGA device. Each of these switches is debounced using a Schmitt Trigger circuit as indicated in
Figure 2-14 . A Schmitt trigger feature introduces hysteresis to the input signal for improved noise
immunity, especially for signal with slow edge rate and act as switch debounce in Figure 2-15 for
the push-buttons connected. Table 2-4 list the pin assignment of user push-buttons.
Figure 2-14 Connections between the push-button and MAX 10 FPGA
Figure 2-15 Switch debouncing
Table 2-4 Pin Assignment of Push-buttons
Signal Name FPGA Pin No. Description I/O Standard
KEY[0] PIN_AB9 Push-button[0] 3.3 V SCHMITT TRIGGER"
KEY[1] PIN_AA9 Push-button[1] 3.3 V SCHMITT TRIGGER"
◼
User-Defined Dip Switch
There are 4 position dip switches connected to FPGA on the board (See Figure 2-16 ). These
switches are used as level-sensitive data inputs to a circuit. Every one of the switches is connected
directly and individually to a pin on the MAX 10 FPGA. When the switch is in the ON position
Pushbutton released Pushbutton depressed
Before
Debouncing
Schmitt Trigger
Debounced