Altera Nios Development Board - Manual (Page 26)

1–18 Altera Corporation
Nios Development Board Reference Manual, Cyclone Edition December 2004
Dual 7-Segment Display
Figure 1–14. Console Serial Port Connector - J19
Figure 1–15. Debug Serial Port Connector – J27
Dual 7-Segment
Display U8 and U9 are connected to the Cyclone device so that each segment is
individually controlled by a general-purpose I/O pin. When the Cyclone
pin drives logic 0, the corresponding LED turns on. See
Figure 1–16 for
Cyclone device pin-out details.
Figure 1–16. Dual-7-Segment Display
The factory-programmed Nios II reference design includes parallel
input/output (PIO) registers and logic for driving this display.