Digilent Digilab 2 - Manual

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D D i i g g i i l l e e n n t t D D i i g g i i l l a a b b 2 2
R R e e f f e e r r e e n n c c e e M M a a n n u u a a l l
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Revision: 5/7/02 215 E Main Suite D | Pullman, WA 99163
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Overview
The Digilab 2 development board (the D2)
features the Xilinx Spartan 2 XC2S200 FPGA
circuit board and provides an inexpensive and
expandable platform on which to design and
implement digital circuits of all kinds. D2
board features include:
• A Xilinx XC2S200 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;
• A 5-wire Rs-232 serial port;
• A status LED and pushbutton for basic
I/O;
• Six 100-mil spaced, right-angle DIP
socket 40-pin expansion connectors.
The D2 board has been designed specifically to
work with Xilinx ISE CAD tools, including the
free WebPack tools available from the Xilinx
website. Like other Spartan 2 boards in the
Digilab family, the D2 board has been
partitioned so that only the hardware required
for a particular project need be purchased.
Several existing peripheral boards that mate
with the expansion connectors are currently
available (see www.digilentinc.com), and new
boards are frequently added. 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 Digilab D2 board has been designed to offer an unembellished, low-cost system for designers who
need a flexible platform to gain exposure to the Spartan 2 device, or for those who need to rapidly
prototype FPGA-based designs. The D2 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
50MHz
CLK
Xilinx Spartan2
XC2S200-PQ208
Power
jack
5-9VDC
2.5VDC
regulator
Status
LED
Expansion E Expansion F
Expansion C
Expansion D
Seri
al
Port
P
ara
lle
l P
o
rt
Port/prog
control
switch
Expansion A Expansion B
EPP or SPP
parallel port
JTAG
Port
Serial
Port
Push
button
B
u
ffer
RS-232
converter
SPROM
3.3VDC
regulator
D2 circuit board block diagram