Clock frequency

[cansudemirkiran]

Hi,
I was wondering how we can relate to the maximum possible clock frequency/memory access latency we can operate the SRAM array using the timing values shown in the generated datasheet. I noticed that there is an event frequency value in the tech.py files which is set to 100 MHz. What does event frequency mean in this context? I tried changing the event frequency value and observed that the power numbers are scaled linearly but the timing values stayed the same. I'd greatly appreciate your explanation. Thanks!

[mguthaus]

Hi Cansu, The default is to use the analytical models (not characterization). This will use Cacti-like models for delay and power. Therefore, power is just alpha*CV^2f. I'm not sure what you mean by "event frequency" value...

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On Mon, Apr 4, 2022 at 9:53 AM Cansu Demirkiran ***@***.***> wrote: Hi, I was wondering how we can relate to the maximum possible clock frequency/memory access latency we can operate the SRAM array using the timing values shown in the generated datasheet. I noticed that there is an event frequency value in the tech.py files which is set to 100 MHz. What does event frequency mean in this context? I tried changing the event frequency value and observed that the power numbers are scaled linearly but the timing values stayed the same. I'd greatly appreciate your explanation. Thanks! — Reply to this email directly, view it on GitHub <#134>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AC67SL4OMRPBXYGXY642UJLVDMNCHANCNFSM5SQEOQAQ> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

-- Matthew Guthaus Associate Dean of Graduate Studies Professor, Computer Science & Engineering Baskin School of Engineering University of California Santa Cruz https://www.soe.ucsc.edu/people/mrg

[cansudemirkiran]

Thank you for the quick response. Simply, I would like to obtain the information here in this slide, the right hand side plots.

Did you obtain these plots in the slides by using characterization? Do you have a documentation for the characterization option, how to use them instead of the default analytical models, etc.

For your question, the event frequency is defined in the tech files (example)

Thanks!

[mguthaus]

Hi,

We ran that manually using some bash scripts.

Matt