Appeal No. 96-0166
Application 08/083,419
Claims 1-3 and 18-20
Claim 1 recites "a digital system of a type having at
least two digital units coupled to a bus means that is shared
by the two digital units for communication of information
therebetween on a mutually exclusive basis during a normal
mode of operation" (emphasis added). Powell states (col. 4,
lines 20-23): "To provide for interface between the modules
in the operational mode, an operational bus 27 is provided for
carrying signals between various modules." The modules in
Powell are configured to provide a defined test boundary for
the functional logic when in the test mode (col. 4,
lines 40-42): "When this test boundary is defined, the module
under test is operationally isolated from the other modules by
isolating the input/output of bus 27." Only one of the
modules is selected at a time by the address decode/select
circuit in the test mode (e.g., col. 6, lines 51-52). Powell
also states (col. 4, lines 5-8): "It should be understood
that the buses 12, 16, and 20 are only interfaced with the
device pins 14, 18 and 24, respectively, during the test
mode." Thus, the "bus means" in claim 1 must be read on
bus 27 in Powell because it is active during the operational
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Last modified: November 3, 2007