Mentor v8.6_4 User Manual

FastScan and FlexTest Reference Manual, V8.6_4

Tools Supported: FastScan and FlexTest

Scope: Setup mode

Prerequisites: This command is only useful before FastScan or FlexTest flattens

the design to the simulation model, which happens when you first attempt to
exit Setup mode or when you issue the Flatten Model command.

SET STatic Learning {ON [-Limit integer]} | OFf

Specifies whether FastScan or FlexTest performs the learning analysis to make
the ATPG process more efficient.

The Set Static Learning command controls whether FastScan or FlexTest
performs the learning analysis immediately after design flattening. FastScan or
FlexTest uses the learned behavior for intelligent decision making in later
processes, such as ATPG and DRC.

If you use the Set Static Learning ON command, the additional learned behavior
focuses primarily on bus gates. This command also allows the test pattern
generation process to immediately recognize conflicts and restricted decisions on
ATPG constraints that result from the gate assignments. By enabling static
learning, you prevent FastScan or FlexTest from unneccessarily remaking many
decisions, thereby improving the ATPG performance.

For more information about the learning analysis, refer to “

” in

the Scan and ATPG Process Guide.

•

ON -Limit integer

A literal and an optional switch and integer pair that enables FastScan to
perform additional static learning analysis. This is the default behavior upon
invocation of FastScan or FlexTest.