Specifications

2–22 Chapter 2: Board Components
Configuration, Status, and Setup Elements
Cyclone III 3C120 Development Board Reference Manual © March 2009 Altera Corporation
Ta bl e 2–17 lists power select rotary switch component reference and manufacturing
information.
PGM CONFIG SELECT Rotary Switch
A 16-position rotary switch, board reference SW5, is used to select the location in flash
memory to load the Cyclone III FPGA design. The rotary switch has 16 positions but
only the first eight are used. For information about the flash memory locations, refer
to Table 2–58 on page 2–60.
Ta bl e 2–18 lists PGM configuration select rotary switch component reference and
manufacturing information.
Speaker Header (J5)
A four-pin 0.1” pitch header is used for a PC speaker connection. The FPGA drives an
R/C filter from a 2.5-V CMOS I/O pin allowing tones to be generated by driving
different frequencies to the pin.
Ta bl e 2–19 lists power select rotary switch component reference and manufacturing
information.
C 12V — All 12-V power (voltage only) (1)
D— — —
E— — —
F— — —
Note to Table 2–16:
(1) Display shows resistor divider output, not actual voltage as the A/D cannot take in sources higher than 3.0 V. See schematic page 5 for resistor
dividers. Current (mA) displays for these voltages are only accurate to see a change in current from one circuit state to another. The absolute
current levels should not be referenced.
Table 2–16. Power Select Rotary Switch Number, Name, Pin, and Description (Part 2 of 2)
Number
Schematic
Signal Name Power Pin Name Description
Table 2–17. Power Select Rotary Switch Component Reference and Manufacturing Information
Board
Reference Description Manufacturer
Manufacturing
Part Number
Manufacturer
Website
SW4 16-position rotary switch Grayhill Corporation 94HCB16WT www.grayhill.com
Table 2–18. PGM CONFIG SELECT Rotary Switch Component Reference and Manufacturing Information
Board Reference Description Manufacturer
Manufacturing
Part Number
Manufacturer
Website
SW5 Rotary switch Grayhill Corporation 94HCB16WT www.grayhill.com
Table 2–19. Power Select Rotary Switch Component Reference and Manufacturing Information
Board Reference Description Manufacturer
Manufacturing
Part Number
Manufacturer
Website
J5 Speaker header Samtec TSW-104-07-G-S www.samtec.com