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Avnet Design Services
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Rev 1.0 06/08/2004
Released
Literature # ADS-xxxx04
3.4 LED
The “DONE” LED (D3) is controlled by the DONE pin on the FPGA. The DONE pin on the FPGA is a bidirectional
signal with an internal pullup. Upon power-up the pin is driven LOW, and tri-states after the device is configured. Tri-
stating the pin after configuration turns the DONE LED on via the pullup resistor.
8 LED’s are provided for testing purposes. The pin assignment for the LEDs is provided in Table 6 .
LED
1500 Pin
4000 Pin
Pin Description
LED0 L7
N9
LED0
LED1 M6
P8
LED1
LED2 L6
N8
LED2
LED3 L5
N7
LED3
LED4 K4
M6
LED4
LED5 K1
M3
LED5
LED6 J4
L6
LED6
LED7 J1
L3
LED7
Table 6 – LED Pin Assignment @ the FPGA
3.5 Dip
Switches
An 8-position DIP-switch is mounted on the board and labeled “S1”.
SWITCH
1500 Pin
4000 Pin
Pin Description
SWITCH0 AJ1 AL3
SWITCH0
SWITCH1 AH1 AK3
SWITCH1
SWITCH2 AG3 AJ5
SWITCH2
SWITCH3 AF4 AH6
SWITCH3
SWITCH4 AE5 AG7
SWITCH4
SWITCH5 AD5 AF7
SWITCH5
SWITCH6 AD9 AF11
SWITCH6
SWITCH7 AC9 AE11
SWITCH7
Table 7 –Switch Pin Assignment @ the FPGA
3.6 Connectors
The Virtex-II Development board is an Avalon compliant motherboard that incorporates board-to-board connectors to
support Avalon expansion boards. The connection between the Virtex-II Development board and the Avalon compliant
daughter boards is via the Avnet standard AvBus connectors (P2, P3, P4 and P5). All the connectors on the board are host
connectors, AMP part number 179031-6, which realize an effective I/O count of 241 signals with the X2V1500 part or 541
signals with the X2V4000/X2V6000. The host connectors allow the development board to serve as a motherboard and can
mate with an expansion board in an Avalon system. The board can mate with any expansion board with a mating connector,
AMP part number 5-179010-6. When interfacing to other boards care must be taken to tri-state any signals that could
interfere with those of the other board.