For the time being, HP's LaserJet
Printer Division is using ScanWorks as a design debug
tool to troubleshoot prototype printed circuit assemblies
(PCAs) via JTAG. But, over the longer term, D'Amico's
group plans to implement the integrated ScanWorks for
the Agilent 3070 in-circuit test solution.
Integrating with ICT
"Right now, the simplicity of
ScanWorks helps us to exercise our PCAs early in the
design process so we can identify any problems and correct
them quickly. The people in our design lab are very
sold on the value of ScanWorks.  Eventually,
we want to use the integrated ScanWorks for the 3070
solution because our PCA’s are being populated
with more and more ball grid arrays with 400 to 800
pins as well as other types of fine pitch packages.
Without ScanWorks, we just can't do a high level of
logical debug on a PCA that has these types of devices."
Involving Design
D'Amico is hoping that more of the
design engineers at HP's LaserJet Printer Division will
come to realize the value of boundary scan and ScanWorks.
"If we can get the design group interested in boundary
scan, then they can design it into more of the application
specific integrated circuits (ASIC’s) they are
developing," D'Amico explained. "And with
boundary scan built into our ASIC’s, we could
do a lot more built-in-self-test (BIST)."
Currently, when an ASIC is developed,
ASSET's services organization, Ensure Design for Test
(EDFT), verifies the accuracy of the device's boundary
scan description language (BSDL) file. Effective boundary
scan tests can not be developed without an accurate
BSDL file for the devices on a scan path.
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