Mentor v8.6_4 . . .

Timing Command Dictionary SET SPLIT_MEASURE_CYCLE TIME

FastScan and FlexTest Reference Manual, V8.6_4 A-15

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 last 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 time zero. Therefore, when you specify this

command, the test pattern formatter safely moves the scan output measure event

(measure_sco) so that it is the last event in 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-2 depicts the effect of the SET SPLIT_MEASURE_CYCLE TIME

command on the test procedure test cycles.

Figure A-2. Scan Event Timing for SET SPLIT_MEASURE_CYCLE

TIME

Note that the measure_sco event for the first shift procedure cycle occurs at the

end of the load_unload procedure. All other measure_sco events for shift cycles

occur at the end of the previous shift cycles.

load_unload shift #1 shift #N

. . .

measure_sco measure_sco

(repeatedly

apply shift)

capture

clock

capture_clock_on