FastScan and FlexTest Reference Manual, V8.6_4
2-50
Add Cone Blocks Command Dictionary
•-Effect
An optional switch specifying that the cone blockage point is only for the
effect cone calculation.
•-CEll cell_name
An optional switch and string pair that specify the name of a DFT library cell
at whose pin_pathnames you want the tool to place clock cone block points.
Examples
The following example shows a clock that fails on the C3 rule, which says that the
clock input of a scan latch is in both the clock and effect cone. If you know that it
will not cause a problem downstream, you can change the blockage point the tool
uses for the clock cone (or effect cone) and allow that element to pass through the
rules checker.
// ----------------------------------------------------------
// Begin scan clock rules checking.
// ----------------------------------------------------------
// 5 scan clock/set/reset lines have been identified.
// All scan clocks successfully passed off-state check.
// All scan clocks successfully passed capture ability check.
// Error: Clock /clk failed rule C3 on input 7 of /LS0 (83).
// Source of violation: input 7 of /LS0 (83).
// Error: Rules checking unsuccessful, cannot exit SETUP mode.
add cone blocks /ls0/q -clock
report cone blocks
clock /LS0/Q
set system mode atpg
...
Related Commands
Delete Cone Blocks Report Cone Blocks