Digilent 250-003P - Manual

D D i i g g i i l l e e n n t t J J T T A A G G - - U U S S B B C C a a b b l l e e
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: 6/17/10 215 E Main Suite D | Pullman, WA 99163
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Overview
The Digilent JTAG-USB Cable provides a
quick and inexpensive USB 2.0 programming
solution for Digilent system boards. The cable
works with any USB-equipped computer and
attaches to system boards using a Digilent 6-
pin JTAG header.
The cable is ideal for notebook computers or
any computer without a parallel port.
It can program any Xilinx device with a
minimum I/O voltage of 1.8V, at speeds up to
ten times faster than a JTAG3 (or parallel 3)
cable.
Features:
•
a Digilent 6-pin JTAG header
•
speeds up to ten times faster than a
JTAG3 cable
•
free JTAG programming software
available
• compatibility with any USB port.
Functional Description
The cable provides an easy and inexpensive
USB connection.
For JTAG programming, the cable’s firmware
drives the JTAG scan chain by transferring .bit
or .svf files. Digilent’s Adept software’s Export
program is needed for JTAG programming.
Export automatically detects devices in the
JTAG scan chain. For more information on
using Export see the Digilent Adept Reference
Manual.
Both the cable and the Adept software are fully
compatible with any Xilinx device on any circuit
board. See the Digilent Adept Reference
Manual for information on programming other
devices.
Before the cable can be used on a given
computer, it must be identified to the Adept
software by adding its serial number or
alphanumeric ID string to the device table in
the Adept software. Every cable is given a
unique serial number and default “DCabUsb”
ID string. The USB administrator tool in the
Adept software can automatically identify a
newly attached cable and add it to the device
table. Once the cable ID is in the device table,
it can be used to configure Xilinx devices.
To download the Adept software and the
Digilent Adept Reference Manual see
www.digilentinc.com .