How to set set_dont_touch in Encounter

Hello Sudersan,

I have used the below option , but i used the same in SDC .

How to specify don't_touch instance ??
STEP-1 :
# DELAY CELL

set_dont_touch [get_cells I_cdnuser_cts/S_CKsunderM_DLY_1 ]
set_dont_touch [get_cells I_cdnuser_cts/S_CKsudarsanM_DLY_2 ]

How to load this on to Encounter ??
STEP-2 :
loadTimingCon -incr ./SDC/dont_touch_cell.sdc

Hope this will satisfy to query .

Do let me know if you need further clarifications .

regards,
Mohan

Thanks mohan, its working..........

I have found that this command is only respected for 1 round of optimization commands. It seems, that if I set a group of books as dont_touch, that is honored for the first optimization. If I then route, and do post-opt, the dont_touch dissapears. I have found I need to run the dont_touch command often, and upon each import of the design. Is this normal?

dbSetIsNetDontTouch [dbGetNetByName your_net_name_here] 1 dbSetIsInstDontTouch [dbGetInstByName your_hierarchy/your_instance] 1

Did you try adding the dont_touch commands to your constraint file, instead of entering them on the command line?

This didn't format very well the first time. To don't touch a net: dbSetIsNetDontTouch [dbGetNetByName your_net_name_here] 1 To don't touch an instance: dbSetIsInstDontTouch [dbGetInstByName your_hierarchy/your_instance] 1 I think you wanted to target a module. Modules are instances but I haven't actually tried don't touching any instances that weren't cells.