Using The 7-Segment Displays - Altera DE2-70 User Manual

LEDG[7]
LEDG[8]

5.3 Using the 7-segment Displays

The DE2-70 Board has eight 7-segment displays. These displays are arranged into two pairs and a
group of four, with the intent of displaying numbers of various sizes. As indicated in the schematic
in Figure 5.6, the seven segments are connected to pins on the Cyclone II FPGA. Applying a low
logic level to a segment causes it to light up, and applying a high logic level turns it off.
Each segment in a display is identified by an index from 0 to 6, with the positions given in Figure
5.7. In addition, the decimal point is identified as DP. Table 5.4 shows the assignments of FPGA
pins to the 7-segment displays.
Figure 5.6. Schematic diagram of the 7-segment displays.
Figure 5.7. Position and index of each segment in a 7-segment display.
Signal Name
HEX0_D[0]
HEX0_D[1]
HEX0_D[2]
PIN_ AA24
PIN_ AC14
Table 5.3. Pin assignments for the LEDs.
0
5
6
4
3
FPGA Pin No.
PIN_AE8
PIN_AF9
PIN_AH9
36
LED Green[7]
LED Green[8]
1
2
DP
Description
Seven Segment Digit 0[0]
Seven Segment Digit 0[1]
Seven Segment Digit 0[2]
DE2-70 User Manual