Case Study
www.xjtag.com
www.xjtag.com
1223
The versatility of the XJTAG system
made it an attractive choice for world-
leading defense and security specialist
Saab, which needed a reliable test
solution to test multi-layer development
boards destined for airborne and naval
electronic warfare systems used in its
IDAS and CIDAS products.
“We have initially used XJTAG in
the production environment to test
our complex, high density, multi-
layered board designs containing
FPGAs and CPLDs, and have
recently introduced the solution to
the development and debug stage
with great success,” says Eduard
Stander, who works for the Controllers
Group at Saab’s Electronic Defense
Systems, South Africa.
“Using XJAnalyser has allowed us to
reduce initial debug issues, and to
debug errors in a shorter time than our
existing tools allowed us.”
“We have found that using the
XJTAG solution, and the Layout Viewer
in particular, has quantifiably reduced
the cost of developing product test
jigs in our production test department,
because of the fast and accurate
diagnosis the system provides.”
“We now can test products that
have processors, SDRAM and FLASH
memories, Ethernet PHYs, A/D
Converters, real time clocks, serial
ports, voltage regulators.”
The team at Saab opted for
XJTAG because of its superior
cost-to-performance ratio and, like
many of XJTAG’s customers, they
were particularly impressed with the
flexibility of the system.
XJTAG makes it easy to write test
routines for devices and allows users
to store them in a library so they can
be reused again when the same, or a
similar component, is used.
The XJTAG Professional System
provides an extensive library of
reusable scripts while XJEase,
XJTAG’s high-level test description
language, allows engineers to write
and customize tests for JTAG and
non-JTAG components without
needing to understand how
boundary scan works. These tests
can be re-used throughout the
product lifecycle as well as in
subsequent projects wherever the
same component is used.
“The reuse of tests on the XJTAG
system is a big time saver,” says
Eduard. “The design for test (DFT)
reports help us ensure that a very high
percentage of our circuits are testable
before we go into serial production
and, with the aid of boundary scan
tests, we get closer to our goal of
100% test coverage on production
Shop Replaceable Units (SRU).”
He adds: “XJTAG’s high-level test
description language XJEase is
central to this flexibility. The ability to
design low level test with XJEase is a
real advantage as the test scripts let
you drive the non-JTAG components
directly.”
Eduard says the company’s next
step is to integrate XJTAG’s portable
boundary scan oscilloscope product
– XJTAG Expert – with its functional
test equipment. “XJTAG is easy to
use, highly effective and flexible
enough to evolve with our test
strategies as we focus on improving
speed and productivity.”
“
The reuse of tests on the XJTAG system is a big time saver. The
design for test (DFT) reports help us ensure that a very high percentage
of our circuits are testable before we go into serial production and, with
the aid of boundary scan tests, we get closer to our goal of 100% test
coverage on production Shop Replaceable Units (SRU).”
“
We have initially used XJTAG in the production environment to test
our complex, high density, multi-layered board designs containing
FPGAs and CPLDs, and have recently introduced the solution to the
development and debug stage with great success.”
Saab serves the global market with world-leading solutions,
products and services ranging from military defense to civil
security. With operations and employees on every continent, Saab
continuously develops, adapts and improves new technology to
meet customers’ changing needs. Saab operates in five business
areas: Aeronautics, Dynamics, Electronic Defense Systems,
Security and Defense Solutions, and Support and Services.
Saab Cuts Costs and Boosts Productivity with XJTAG
® Boundary Scan
“
Defense and Security company Saab selected the XJTAG development system to speed up the process of
debugging and testing multi-layer development boards destined for its IDAS and CIDAS projects used in
electronic warfare systems.”
Company
Saab
HQ Sweden
Nature of
Defense and security solutions
business
Customers
Global market with world-leading
products, services and solutions
from military defense to
civil security
Locations
Operations on every continent
Employees
13,000
Revenue
SEK 23,5 billion
20% related to R&D
Web site
www.saabgroup.com
opinion
Eduard Stander
Controllers Group
Saab
photos: Saab
VDD
23
OSC1
10
OSC0
VDD
15
VDD
LDO
VDD
32
QN
D1
150R
R12
150R
R13
D2
D3
150R
R14
150R
R15
D4
LED4
LED1
LED2
LED3
LEDC
100R
R10
820R
R11
CPUTDO
XilTDO
CPUTDI
XilTDO
NandGate
+3.3v
1uF
C2
11
12
13
IC8D
SN74LVC00ADBLE
3.68MHza
56pF
C13
TRST
1K
R23
51R
R22
GND
1K
R24
LDO
LEDs
68MHz Clock
GND
+3.3v
TCK
TCK
10K
R2
10K
R31
GND
+3.3v
A12
A11
Pull Resistors
100R
R36
100R
R34
470R
R35
3.68MHzb
3.68MHzc
3.68MHza
JP2
Header 2
JP3
Header 2
JP4
Header 2
JP5
Header 2
GND
R37
R38
10K
+3
TMS
CPUTDI
JTAG Chain Options