SET END_MEASURE_CYCLE TIME | Timing Command Dictionary |
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SET END_MEASURE_CYCLE TIME
Scope: Enables special timing rules checking
Usage
SET END_MEASURE_CYCLE TIME integer
Description
Ensures that the primary output measure is the last event of the test cycle and moves the measure_sco event to the end of the previous test cycle. This command cannot be used with patterns containing a capture clock. Use the Set Split_measure_cycle Time command for patterns that contain a capture clock.
Certain tester formats, such as TDL 91, expect all measures to occur at the end of 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 test cycle. Therefore, when you specify this command, the test pattern formatter safely moves the scan output measure event to the end of the previous cycle. The first measure_sco event moves to the end of the load_unload procedure cycle and each succeeding measure_sco event moves to the previous shift procedure cycle.
Figure A-1 depicts the effect of the SET END_MEASURE_CYCLE TIME command on the test procedure test cycles.
load_unload | shift #1 |
capture clock
(repeatedly | shift #N |
apply shift) |
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. . .
measure_scomeasure_sco
Figure A-1. Scan Event Timing for SET END_MEASURE_CYCLE
TIME
FastScan and FlexTest Reference Manual, V8.6_4 |
