What are Setup and Hold Margin need to met at User...
# timing-closured
Dinesh A
11/20/2021, 2:15 PMWhat are Setup and Hold Margin need to met at User Wish Bone Interface?.
I am more worry about input hold and Output setup as clock and data coming from Caravel.
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Matt Venn
11/20/2021, 2:22 PMGreat question. Is caravel user project setup to route the buses with respect to timing?
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Matthew Guthaus
11/20/2021, 4:21 PMI think they are working on that...
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Matt Venn
11/20/2021, 4:49 PMI tagged a few people in the shuttle channel: https://skywater-pdk.slack.com/archives/C017HPHCMEY/p1637417876257500?thread_ts=1636881400.197200&cid=C017HPHCMEY
Matt Venn
11/20/2021, 4:49 PMseems like it might be quite important
Matt Venn
11/20/2021, 4:49 PMI've got to learn how to setup and run these types of timing experiements
Matt Venn
11/20/2021, 4:49 PMdo you know anyone who knows how?
Matt Venn
11/20/2021, 4:49 PMI could make a video about it
Matt Venn
11/23/2021, 3:15 PM@User
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mkk
11/30/2021, 3:19 PM
@User @User @User Sorry guys for the radio silence - we have been processing it in the background and we got some good help from the openroad team for checking the timing.
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Matthew Guthaus
11/30/2021, 4:37 PMIs it possible to share this?
Matthew Guthaus
11/30/2021, 4:37 PM@User?
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mkk
11/30/2021, 8:09 PM
yes of course
mkk
11/30/2021, 8:10 PM
give me a few
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Matt Venn
11/30/2021, 8:11 PMA few nanoseconds? Megaseconds? 😅
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mkk
11/30/2021, 8:16 PM
1. Thanks to @User
2. this is how it is done for Caravel mgmt_area
3. we havent applied it to the user_proj
4. See make file here - scroll to target mgmt_core_wrapper_timing
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Dinesh A
12/02/2021, 11:15 AM@User As these timing constraint are within the mgmt_core and does not give idea on Wishbone interface timing constraints towards the user_project_wrapper.
Is there is plan to publishing Wishbone Interface timing spec towards user_project_wrapper side ?
Without the clear definition of wishbone interface timing, there is chance of most of the MPW-2/MPW-3 Digital projects will be broken ..
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Dinesh A
12/04/2021, 9:29 AM@User Where i can find the rest of the caravel block's spef so that we can locally run full-chip STA with our user_project_wrapper