Mentor v8.6_4 manual SET Splitmeasurecycle Time

Timing Command Dictionary SET SPLIT_MEASURE_CYCLE TIME

SET SPLIT_MEASURE_CYCLE TIME

Scope: Enables special timing rules checking

Usage

SET SPLIT_MEASURE_CYCLE TIME integer

Description

Specifies the period for test procedures and splits the non-scan cycle at the measure time.

Certain tester formats, such as TDL 91, expect all measures to occur as the last event in the tester cycle. However, the scan output pin comparison always occurs in the shift procedure prior to the shift clock application. The tester should measure scan output pins in the shift procedure at the end of the previous cycle. Therefore, when you specify this command, the test pattern formatter safely moves the measure_sco event to be the last event of the previous cycle.

This command also causes the application to split the non-scan test cycle into two test cycles. The application splits the test cycle only if the measure_po event does not occur at the end of the test cycle.

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

∙All output pin strobes occur in the same timeframe.

∙At least one input pin force occurs in a timeframe after the timeframe in which output pin strobes occur.

∙The period of all pins is twice that of the split_measure_cycle time.

∙The period of all scan test procedures equals the split_measure_cycle time or is the split_measure_cycle time multiplied by the number of test cycles in the test procedure.

∙The split_measure_cycle time is greater than the measure time and less than or equal to the force time for each pin.

FastScan and FlexTest Reference Manual, V8.6_4 A-57