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util_sync_constr: Preserve 1bit CDCs with ASYNC_REG true

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Istvan Csomortani 2017-02-23 11:44:01 +02:00
parent 94bda1d415
commit d820d3d245
1 changed files with 4 additions and 2 deletions
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6
library/util_tdd_sync/util_tdd_sync_constr.xdc
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@ -1,4 +1,6 @@
set_false_path -to [get_cells -hier -filter {NAME =~ *sync_mode_d1* && IS_SEQUENTIAL}]
set_false_path -from [get_cells -hier -filter {NAME =~ *sync_out_reg* && IS_SEQUENTIAL}]
set_property ASYNC_REG TRUE \
[get_cells -hier *sync_mode_d*]
set_false_path -to [get_cells -hier -filter {name =~ *sync_mode_d1* && IS_SEQUENTIAL}]