Digilent D2XL - Manual

D D i i g g i i l l e e n n t t D D 2 2 X X L L ™ ™ S S y y s s t t e e m m B B o o a a r r d d
®
w w w . d i g i l e n t i n c . c o m
June 9, 2004 215 E Main Suite D | Pullman, WA 99163
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Doc: 210-015 page 1 of 7
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Overview
The Digilent D2XL development board (the D2XL)
featuring the Xilinx Spartan 2 XC2S30 FPGA
provides an inexpensive and expandable platform
on which to design and implement digital circuits of
all kinds. D2XL board features include:
• A Xilinx XC2S30 FPGA;
• Dual on-board 1.5A power regulators (2.5V
and 3.3V);
• A socketed 50MHz oscillator;
• An EPP-capable parallel port for JTAG-based
FPGA programming and user data transfers;
• An SPROM socket for automatic FPGA
configuration at power-on;
• A status LED and pushbutton for basic I/O;
• Two 100-mil spaced, right-angle DIP socket
40-pin expansion connectors.
The D2XL board has been designed specifically to work with the Xilinx ISE CAD tools, including the
free WebPack tools available from the Xilinx website. Like other Spartan 2 boards in the Digilab
family, the D2XL board has been partitioned so that only the hardware required by a particular project
need be purchased. Several existing peripheral boards that mate with the expansion connectors are
available (see www.digilentinc.com), and new expansion boards are added often. The low-cost,
standard expansion connectors allow new peripheral boards, including wire-wrap or manually
soldered boards, to be quickly designed and used. The D2 board ships with a power supply and
programming cable, so designs can be implemented immediately without the need for any additional
hardware.
Functional description
The D2XL board has been designed to offer a low-cost and minimal system for designers who need a
flexible platform to gain exposure to the Spartan 2 device, or for those who need to prototype FPGA-
based designs rapidly. The D2XL board provides only the essential supporting devices for the Spartan
2, and routes all available FPGA signals to standard expansion connectors. Included on the board are
2.5VDC and 3.3VDC regulators, a JTAG configuration circuit that uses a standard parallel cable,
basic communication ports including an enhanced parallel port, a 50MHz oscillator, and a pushbutton
and LED for rudimentary I/O.
50MHz
CLK
Power
jack
5-9VDC
2.5VDC
regulator
Status
LED
Expansion E Expansion F
Parallel Port
Port/prog
control
switch
EPP or SPP
parallel port
JTAG
Port
Push
button
Buffer
SPROM
3.3VDC
regulator
Xilinx Spartan2
XC2S30-TQ144