Mentor v8.6_4 ユーザーズマニュアル

FastScan and FlexTest Reference Manual, V8.6_4

Scope: Enables special timing rules checking

SET SINGLE_CYCLE TIME integer

Enables timing rules checking to ensure a single time exists for both scan and non-
scan test cycles.

Some tester formats, such as Compass Scan, TDL 91, and FTDL-E, allow only a
single timing definition for each tester cycle. As a result, both the scan test
procedure and the non-scan cycle must use the same timing. The SET
SINGLE_CYCLE TIME command enables the ASICVector Interfaces (AVI)
functionality to perform this timing check.

If you place this command in the timing file, the timing rules checker ensures
compliance to the following conditions:

•

The period of all scan test procedures and timeplates equals either the
single_cycle time or the number of cycles multiplied by the single_cycle
time.

•

The period of all the pins equals the single_cycle time.

•

The timing specified in each timeplate corresponds to the timing specified
in the super timeplate.

•

For each scan test procedure, each force event time on a clock pin occurs at
the force offset time in each cycle, as specified in the super timeplate.

•

For each scan test procedure, each force event on a non-clock pin occurs at
the force offset time in each cycle, as specified in the super timeplate.

Note that you can specify only one of the following commands in a timing file:

•

•