Specifications

2–30 Chapter 2: Board Components
General User Interfaces
Cyclone III 3C120 Development Board Reference Manual © March 2009 Altera Corporation
7-Segment Displays
This section discusses the following two on-board displays:
■ User 7-segment display
■ Power 7-segment display
User 7-Segment Display
Board reference U30 is a four-digit, user-defined, 7-segment display that is labeled
User Display. Each segment’s LED driver input signals are multiplexed to each of the
four digits and a minus sign. A small HDL code snippet continuously writes to each
of the four segments so that they appear constantly illuminated.
Ta bl e 2–33 lists the 7-segment display pin-out.
Table 2–33. 7-Segment Display Pin-Out
Board
Reference Description I/O Standard
Schematic
Signal Name
Cyclone III
Device
Pin Name
U30 pin 12 User-defined display signal 1.8 V SEVEN_SEG_A AD5
U30 pin 11 User-defined display signal 1.8 V SEVEN_SEG_B A3
U30 pin 3 User-defined display signal 1.8 V SEVEN_SEG_C C4
U30 pin 8 User-defined display signal 1.8 V SEVEN_SEG_D D4
U30 pin 9 User-defined display signal 1.8 V SEVEN_SEG_E E5
U30 pin 7 User-defined display signal 1.8 V SEVEN_SEG_F D5
U30 pin 5 User-defined display signal 1.8 V SEVEN_SEG_G AE6
U30 pin 2 User-defined display signal 1.8 V SEVEN_SEG_DP AD4
U30 pin 13 User-defined display signal 1.8 V SEVEN_SEG_SEL1 B3
U30 pin 1 User-defined display select signal 1.8 V SEVEN_SEG_SEL2 C5
U30 pin 10 User-defined display select signal 1.8 V SEVEN_SEG_SEL3 E4
U30 pin 4 User-defined display select signal 1.8 V SEVEN_SEG_SEL4 C3
U30 pin 6 User-defined display select signal 1.8 V SEVEN_SEG_MINUS G19