Digilent X-Board User Manual
Digilent Hardware
X
X
-
-
B
B
o
o
a
a
r
r
d
d
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
P
P
r
r
o
o
d
d
u
u
c
c
e
e
d
d
i
i
n
n
C
C
o
o
o
o
p
p
e
e
r
r
a
a
t
t
i
i
o
o
n
n
w
w
i
i
t
t
h
h
X
X
i
i
l
l
i
i
n
n
x
x
,
,
I
I
n
n
c
c
.
.
®
www.digilentinc .com
Revision: January 2, 2007
215 E Main Suite D | Pullman, WA 99163
(509) 334 6306 Voice and Fax
6 pages
Doc: 502-107
© 2007 Digilent, Inc. All rights reserved. DIGILENT and the Digilent logo are trademarks of Digilent, Inc. XILINX, and the Xilinx and
CoolRunner-II logos are trademarks of Xilinx. Other product and company names mentioned may be trademarks of their respective owners.
Overview
The X-Board is a complete circuit development
platform for Xilinx’s CoolRunner
TM
-II CPLD. It
provides all essential support circuits for the
CoolRunner-II, so users can focus on creating
and downloading new designs. An on-board
USB2 port supplies power to the board and
provides a data port for CPLD configuration as
well as user data transfers.
More than 75 CPLD signals are routed to
expansion connectors so designs can easily be
extended. Thirty-two signals are routed to 6-pin
connectors that can accommodate Digilent’s
Pmod I/O modules – Pmods are small, low-cost
accessory boards offering circuits like A/D and
D/A converters, various I/O ports, and high-
current outputs for motor drivers, etc.
X-Board features include:
• A 256 macrocell CoolRunner-II CPLD
in a TQ-144 package
• An on-board USB2 port for JTAG
programming and user-data transfers
• An on-board 16-bit A/D converter to
measure real-time CPLD current during
board operation (data is sent to the PC
for display via the USB cable)
• An user-settable silicon oscillator
(1000/100/10 KHz), plus pads for a
second crystal oscillator
• 12 LEDs and two pushbuttons for
on-board I/O
Functional Description
The X-Board provides an inexpensive, robust, and easy-to-use platform that anyone can use to gain
experience with the latest CPLD devices and modern design methods. It is centered on the
CoolRunner-II CPLD, and it contains all needed support circuits so designs can get up and running
quickly. The X-Board is an ideal introductory platform for experimenting with new designs or learning
about CPLDs and CAD tools. The large collection of expansion connectors allow designs to grow
beyond the X-Board, either with user-designed boards or breadboards and/or peripheral module
(Pmod) boards offered by Digilent.
J1
JT
A
G
2 buttons
12 LEDs
6-pin connectors
For A/D & D/A converters,
motor drivers, etc.
32
Xilinx CoolRunner2 XC2C256-TQ144
USB2 Port
Silicon Oscillator
(1000/100/10KHz)
3V3
USB
Power Supplies
3V3
I/O
Current
Meter
J2
J3
J4
J5
J6
J7
J8
J9 (26 pin)
J10 (16 pin)
J12 (6 pin)
General Purpose
Connectors
40
US
ER DAT
A
1V8