Altera Cyclone III Reference Manual page 13

Table 2–1. Cyclone III Development Board (Part 2 of 3)
Board Reference
Configuration Status and Setup Elements
J6 Device select (DEV_SEL)
jumper
J3 Input
D20 through D24 User LEDs
D25 Configuration done LED
D12 through D15 Channel activity LEDs
J5 Header
D1, D3, D4 Ethernet PHY LEDs
D6 Duplex Ethernet PHY
LED
D5 Power LED
D7, D8 Ethernet PHY
transmit/receive activity
LEDs
SW1 MAX II device control DIP
switch
SW3 JTAG control switch
D17 SRAM active
D23 Flash active
U28 Power display
D16 DDR2 LED
D11 DDR2 LED
Clock Circuitry
Y4 125 MHz
Y5 50 MHz
Y1 24 MHz Crystal
Y2 6 MHz Crystal
Y3 24 MHz
Altera Corporation
March 2008
Type
Sets target device for JTAG signals when using an external
USB Blaster
Type B USB connector that allows for connecting a Type A-B
USB cable between a PC and the board.
Board-specific configuration green LEDs.
Green LED that illuminates when the FPGA is successfully
configured.
Green LEDs that indicate the RX and TX activity on the HSMC
Ports A or B.
Speaker header
Green Ethernet PHY LEDs. Illuminate when Ethernet PHY is
using the 10/100/1000 Mbps (D1, D3, D4) connection speeds.
Green Ethernet PHY LED. Illuminates when Ethernet PHY is
both sending and receiving data.
Blue LED indicates when power is applied to the board.
Green LED. Illuminates when transmit/receive data is active
from the Ethernet PHY.
Controls various features specific to the Cyclone III
development board.
JTAG control DIP switch used to remove or include devices in
the active JTAG chain.
SRAM active LED. Illuminates when the SRAM device is
accessed.
Flash active LED. Illuminates when the flash device is
accessed.
Displays power measured by the MAX II CPLD.
Indicates that the DDR2 top devices are active.
Indicates that the DDR2 bottom devices are active.
125-MHz clock oscillator used for the system clock
50-MHz clock oscillator used for data processing
Cypress USB PHY
USB PHY FTDI reference clock
MAX II device clock
Reference Manual
Description
™
or equivalent.
Cyclone III Development Board
Board Components
2–3