Digilent 410-047-C2P-KIT User Manual
Digilent Hardware
D
D
i
i
g
g
i
i
l
l
e
e
n
n
t
t
C
C
-
-
M
M
o
o
d
d
™
™
B
B
o
o
a
a
r
r
d
d
s
s
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
®
w w w . d i g i l e n t i n c . c o m
Revision: June 4, 2004
215 E Main Suite D | Pullman, WA 99163
(509) 334 6306 Voice and Fax
Doc: 502-047
page 1 of 3
Copyright Digilent, Inc. All rights reserved. Other product and company names mentioned may be trademarks of their respective owners.
Figure 1. C-Mod XCR module
Overview
C-Mod boards combine a Xilinx CPLD, a JTAG
programming port, and power supply circuits in
a convenient 600-mil, 40-pin DIP package. C-
Mods are ideally suited for breadboard or other
prototype circuit designs where the use of
small surface mount packages is impractical.
All C-Mod boards include:
• A single 3.3V supply voltage (voltage
regulation provided on C-Mod board where
required);
• Adequate bypass capacitance on all CPLD
voltage supply pins;
• All available user I/O signals brought out to
DIP pins;
• Once programmed, CPLD designs are non-
volatile;
• Designs can easily be ported between C-
Mods using different CPLD device families;
• All C-Mod boards are compatible with the
free Xilinx WebPack tools.
C-Mods were created to make the latest Xilinx
CPLDs more practical for experimental and
prototype circuits. They can plug directly in to
breadboards or IC sockets, and they can mate
with the Digilent Ceres™ board to utilize a
collection of ready-made I/O circuits. C-Mods
are available with CoolRunner-II CPLDs (C-
Mod C2), CoolRunner CPLDs (C-Mod XCR),
and XC95 CPLDs (C-Mod 95). C-Mod boards
are especially useful for investigating designs
across a variety of CPLD families.
Functional Description
C-Mod boards, which measure just 0.7” by
2.16”, allow designers to experiment with
CPLD-based designs in a variety of state-of-
the art devices. Designs can easily be ported
from one C-Mod to another, so that design
performance in different devices can be
compared and contrasted. The 40-pin DIP form
factor allows C-Mods to be used in breadboard
or other through-hole circuits where surface-
mount devices are impractical. They can be
configured with a wide range logic circuits,
from simple logic functions to sequential
controllers. All available CPLD I/O signals are
routed to the 40-pin DIP connections.
40 pin, 600-mil DIP Connector
CPLD in VQ44 Package
1.8VDC
regulator
(C2 Mod)
CMod-XCR: XCR3064XL
CMod-C2: XC2C64
CMod-95: XC9572XL
JTAG
Connector
Figure 2. C-Mod circuit board block diagram