ylfink@water.UUCP (ylfink) (01/07/87)
DEPARTMENT OF COMPUTER SCIENCE
UNIVERSITY OF WATERLOO
SEMINAR ACTIVITIES
LOGIC DESIGN SEMINAR
- Thursday, January 8, 1987.
Ms. Micaela Serra of the University of Victoria will
speak on ``New Methods for the Compaction Testing of
Multiple-Output Digital Circuits''.
TIME: 3:30 PM
ROOM: MC 6082
ABSTRACT
The increasing importance of data compaction techniques
for the testing of digital circuits is discussed. The
testing problem and its traditional solutions are
introduced. Methods for the derivation of fault signa-
tures for protection against both stuck-at and bridging
faults are discussed. The signatures are based on par-
ticular counting techniques applied to the output of
the circuit under test.
A new approach, ``space compression'', to testing
multiple-output circuits is proposed. Testing is
applied in parallel to all outputs and produces a sin-
gle signature. Criteria are given for detecting
whether or not a line is testable, using a determinis-
tic approach without the need for extensive simulation.
Of great significance is the optimal application of the
theory to highly structured multiple-output networks
like Programmable Logic Arrays and Read Only Memories.
For these examples space compression testing gives full
coverage of all single stuck-at-faults, bridging
faults, and cross-point faults.