Timing Command Dictionary SET SPLIT_MEASURE_CYCLE TIME
FastScan and FlexTest Reference Manual, V8.6_4 A-57
SET SPLIT_MEASURE_CYCLE TIMEScope: 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.