Specifications

Chapter 2: Board Components 2–27
General User Interfaces
© March 2009 Altera Corporation Cyclone III 3C120 Development Board Reference Manual
User-Defined DIP Switches
Board reference SW6 is an 8-pin DIP switch. The switches in SW6 are user-defined,
and are provided for additional FPGA input control. Each pin can be set to a logic 1 by
pushing it to the open position, and each pin can be set to a logic 0 by pushing it to the
closed position. There is no board-specific function for these switches.
Ta bl e 2–25 lists the user DIP switch setting, schematic signal name, and corresponding
Cyclone III device’s pin number.
Ta bl e 2–26 lists the user-defined DIP switch component reference and manufacturing
information.
User-Defined LEDs
The board includes general, HSMC, and DDR2 user-defined LEDs. This section
discusses all user-defined LEDs.
f For information about board specific or status LEDs, refer to “Status Elements” on
page 2–17.
General User-Defined LEDs
Board references D26 through D33 are eight user LEDs, which allow status and
debugging signals to be driven to LEDs from the FPGA designs loaded into the
Cyclone III device. There is no board-specific function for these LEDs.
Ta bl e 2–27 lists the general user LED reference number, schematic signal name, and
corresponding Cyclone III device pin number.
Table 2–25. User-Defined DIP Switch Pin-Out (SW6)
Board Reference
SW6 DIP Switch Description I/O Standard
Schematic
Signal Name
Cyclone III
Device
Pin Number
SW6 pin 1 User-defined DIP switch pin 1 1.8 V USER_DIPSW0 AC14
SW6 pin 2 User-defined DIP switch pin 2 1.8 V USER_DIPSW1 AD18
SW6 pin 3 User-defined DIP switch pin 3 1.8 V USER_DIPSW2 AG23
SW6 pin 4 User-defined DIP switch pin 4 1.8 V USER_DIPSW3 AC19
SW6 pin 5 User-defined DIP switch pin 5 1.8 V USER_DIPSW4 AD14
SW6 pin 6 User-defined DIP switch pin 6 1.8 V USER_DIPSW5 G20
SW6 pin 7 User-defined DIP switch pin 7 1.8 V USER_DIPSW6 AB15
SW6 pin 8 User-defined DIP switch pin 8 1.8 V USER_DIPSW7 AF25
Table 2–26. User-Defined DIP Switch Component Reference and Manufacturing Information
Board Reference Description Manufacturer
Manufacturing
Part Number
Manufacturer
Website
SW6 8-position rocker DIP switch Grayhill Corporation 76SB08ST www.grayhill.com