Alinx Cyclone IV FPGA User Manual page 50

Keys Pin Assignment
Button Name
KEY1
KEY2
KEY3
KEY4
RESET
Part 20: 7-segment displays
The digital tube is a very common display device. It is generally divided into
a seven-segment digital tube and an eight-segment digital tube. The difference
between the two is that the eight-segment digital tube has a more "point" than
the seven-segment digital tube. The digital tube we use is a 6-in-one
eight-segment digital tube. The segment structure of the digital tube is shown in
Figure 20-1.
The AX515 FPGA development board used a common anode digital tube.
When the corresponding pin of a field is low, the corresponding field is lit.
When the corresponding pin of a certain field is high, the corresponding
field is not lit.
After the above schematic, let's look at the design on the FPGA
development board AX515.
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Cyclone IV FPGA Development Board AX515 User Manual
FPGA Pin
Figure 20-1 Segment Structure of Digital Tube
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Contact Email: rachel.zhou@alinx.com.cn
C17
A19
D17
E13
B19
Key name
KEY 1
KEY 2
KEY 3
KEY 4
RESET