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16502 Discussions

how to set the delay for an asynchronous input

lkg47
Beginner
1,111 Views
 

Hello, please help:

демодулятор_стробированием.png

async port --- "data"

pll clk --- clk_1

how to set constraints that define difference between delay lines "data ---> R3|clk" and "data --->R1|d"

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Kenny_Tan
Moderator
1,097 Views

You may use set_data_delay, in the timing analyzer you type:


set_data_delay --help


You will see the description on it.


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lkg47
Beginner
1,094 Views

invalid command name "set_data_delay"

quartus 15

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ak6dn
Valued Contributor III
1,089 Views

Why would you use that circuit?

How are you going to use the output of R3? In what clock domain? Are you going to run it thru another dual rank synchronizer to access it in clock domain clk_1? Or what?

set_min_delay and set_max_delay are the sdc primitives you can use to constrain the net delays between the referenced ports.

Never heard of set_data_delay. Where is there a reference to that?

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Kenny_Tan
Moderator
1,081 Views

set_data_delay was newly introduce. You may have to use the latest Quartus prime pro to check on it.


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ak6dn
Valued Contributor III
1,078 Views

Hmmm. Only latest version of "Quartus Prime Pro" for set_data_delay.

Probably not useful then to 99.9% of people here.

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Kenny_Tan
Moderator
1,061 Views

Sure.


Since this thread had been answered, we shall close this thread. If you still need further assistance, you are welcome to post a response within 15days. After 15 days, this thread will be transitioned to community support. The community users will be able to help you with your follow-up questions. 


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