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NuvKFC's avatar
NuvKFC
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3 years ago
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How to constraint max skew between two net or balance the delay between two net?

I have two end point (two path) that need to balance the delay. The design is as follows. Path1: PAD1-->clock of module A: clock_a Path2: PAD2-->data of module A: data_a How t...
AEsqu's avatar
AEsqu
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3 years ago

You can try using set_min_delay / set_max_delay instead on the ports

NuvKFC's avatar
NuvKFC
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3 years ago

Hi AEsqu

Thank you, AEsqu, very much.

The design and the constraint are as follows.

If I use set_min_delay and set_max_delay on the ports, how to report timing report?

Sorry that I have no experience about reporting set_min_delay and set_max_delay constraint on the paths (PAD1 to Clock_a, PAD2 to Data_a).

I only know how to report setup, hold, recovery, removal, and skew in TimeQuest.

Design:

Constraint:

create_clock Clock_a [get_port Module_A|Clock_a]

create_clock Data_a [get_port Module_A|Data_a]

create_clock Clock_b [get_port Module_B|Clock_a]

create_clock_groups -asynchronous -group [Clock_b ]

-group [Clock_a Data_a]

set_net_delay -max 5.0 -from PAD1 -to Clock_a

set_net_delay -min 0.0 -from PAD1 -to Clock_a

set_net_delay -max 5.0 -from PAD2 -to Data_a

set_net_delay -min 0.0 -from PAD2 -to Data_a