|  ASSET
currently offers two services to validate the accuracy of
Boundary Scan Description Language (BSDL) files that characterize
the boundary-scan functionality of semiconductor devices.
One service validates a device’s BSDL file while the
chip is still in development. The second service verifies
the accuracy of a BSDL file against actual silicon.
The quality of these BSDL files is essential to improving
the testability of printed circuit boards and systems for
hardware manufacturers. When a BSDL file is inaccurate or
the implementation of boundary-scan in a device is poorly
executed, testing or programming the device will require additional
time and effort to troubleshoot. Moreover, in the worst case,
an inaccurate BSDL file will reduce boundary-scan test coverage
in every product where the device is designed-in.
BSDL Validation Service
ASSET and Agilent Technologies,
Inc. have jointly developed a new online service that performs
BSDL validation. This free service syntactically and semantically
checks the file, confirming correct spelling, punctuation,
instruction codes, register associations and register cells,
as required by the 1149.1 standard. It also automatically
generates test patterns, creating a set of test vectors in
a simple truth-table. These vectors can effectively test a
chip design during the simulation phase to verify that it
meets many of the requirements of the IEEE 1149.1 boundary
scan standard.
To access BSDL Validation Service, click
here.
 BSDL
Silicon Validation Service
Once a BSDL file has been syntactically and semantically
validated and first samples of the semiconductor device have
been produced, the accuracy of the file can be verified against
actual silicon with ASSET’s BSDL Silicon Validation
Service. The silicon is sent to ASSET and placed in a fixture
that provides proper power and ground, boundary scan access
to each I/O, access to TRST, TMS, TCK, TDI and TDO, and static
control of compliance enable pins. Then a test sequence is
generated for the device/BSDL consisting of:
- RESET Action
- DR Verify Action
- Scan Path Verify Action
- Device ID and Bypass DR Scan only
- IR Capture
- Bypass Register
- IDCODE
- Boundary-scan Register Length
- USERCODE (if applicable)
- Interconnect/Pin Test
Click
here to view a Statement of Work for 1149.1 BSDL Silicon Validation.
Click
here to view a Statement of Work for 1149.6 BSDL Silicon Validation.
Why
Validate? Click here to read a Horror Story...
For more information on the BSDL Silicon Validation Service,
please
click here.
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