Mentor v8.6_4 用户手册

FastScan and FlexTest Reference Manual, V8.6_4

Scope: Enables special timing rules checking

SET SPLIT_BIDI_CYCLE TIME integer

Specifies the period for test procedures and splits the non-scan cycle before the
force or bidi_force time.

Certain testers formats, such as UTIC and Compass Scan, do not allow state
changes on both input pins and bidirectional pins in a single tester cycle. In this
case, you must split each non-scan cycle into two tester cycles. The SET
SPLIT_BIDI_CYCLE TIME command enables the ASICVector Interfaces (AVI)
functionality to split the non-scan test cycle into two tester cycles when writing
patterns.

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

•

The period of all pins is twice that of the split_bidi_cycle time.

•

The period of all scan test procedures equals the split_bidi_cycle time
multiplied by the number of cycles in the test procedure.

•

The timing file contains the SET BIDI_FORCE TIME command to specify
bidirectional pin force times.

•

All bidirectional pins have the same offset time.

•

The split_bidi_cycle time is greater than the force time and less than or
equal to the bidirectional force time for each bidirectional pin.

•

For each scan test procedure, each force event time on a clock pin
corresponds to the pair of force times specified in the timing file.

•

For each scan test procedure, each force event on a non-clock pin
corresponds to the force time specified in the timing file.