User manual

DE2 User Manual
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4.3 Using the 7-segment Displays
The DE2 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 4.6, 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
4.7. Note that the dot in each display is unconnected and cannot be used. Table 4.4 shows the
assignments of FPGA pins to the 7-segment displays.
Figure 4.6. Schematic diagram of the 7-segment displays.
Figure 4.7. Position and index of each segment in a 7-segment display.