Mentor v8.6_4 User Manual

FastScan and FlexTest Reference Manual, V8.6_4

Tools Supported: FastScan

Scope: Atpg, Good, and Fault modes

Prerequisites: A properly formatted path definition file must exist at the specified

filename location.

LOAd PAths filename [-Force | -Noforce]

Reads into FastScan the path definitions contained in the specified ASCII file.

The Load Paths command reads the paths defined in the specified ASCII file into
FastScan program memory. “

” heading in the Scan and

ATPG Process Guide describes the formatting for that file.

You can specify for FastScan to create ATPG patterns to detect path delay faults
by first placing the paths into a properly formatted file, then using the Load Paths
command, and finally by adding the faults on those paths with the Add Faults or
Load Faults command. You must also specify the path delay fault type with the
Set Fault Type command.

If you return to the Setup mode with faults in the path delay fault list, FastScan
deletes the faults in that list and issues a warning message.

You can use multiple Load Paths commands and the results are additive.
However, if you do not use the -Force switch, and one of the following conditions
fails when FastScan reads in the path data, FastScan generates an error and
terminates the execution of the Load Paths command:

•

The path name must not be the same as the name of an existing path.

•

The first pin for a path must be a valid launch point. A valid launch point is
a primary input of a scan cell state element, or a non-scan state element that
satisfies the C1 clock rule.