Mentor v8.6_4 manual SET Splitbidicycle Time

SET SPLIT_BIDI_CYCLE TIME Timing Command Dictionary

SET SPLIT_BIDI_CYCLE TIME

Scope: Enables special timing rules checking

Usage

SET SPLIT_BIDI_CYCLE TIME integer

Description

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

Certain tester 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 timeplate periods are all twice 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 super timeplate contains a bidi_force_pi event.

∙The split_bidi_cycle time is greater than the force_pi time and less than or equal to the bidi_force_pi time in the super timeplate.

∙The timing of each timeplate is compatible with the super timeplate. For example, the force_pi time in each timeplate should occur at the same time as in the super timeplate.

∙For each scan test procedure, each force event time on a clock pin corresponds to the split_bidi_cycle time minus the super timeplate clock force times.

A-12 FastScan and FlexTest Reference Manual, V8.6_4