-
Notifications
You must be signed in to change notification settings - Fork 382
New issue
Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.
By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.
Already on GitHub? Sign in to your account
docs/rules/rcx: update resistance-values #377
base: main
Are you sure you want to change the base?
Conversation
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
This corrects the main errors in the documentation. From what I have in the magic tech file, though, it appears that the entry for Nwell
should be changed from 1700000
to 950000
.
Also, the file should probably have some indication that the values are for the nominal process corner, as opposed to the low and high resistance corners. Ideally, all three values for low/nominal/high should be in the file, as well as values for the A and B process variants (A=original, B=ReRam).
@RTimothyEdwards can you also update the source spreadsheet (https://docs.google.com/spreadsheets/d/1oL6ldkQdLu-4FEQE0lX6BcgbqzYfNnd1XA8vERe0vpE/edit#gid=1059412464) as I'm importing the data from here. |
Do we have the data for A and B / various corners in another spreadsheet? or should we be sourcing it from https://github.com/RTimothyEdwards/open_pdks/blob/5ed94ffe0059046164bfb97f670fab648fa90602/sky130/magic/sky130.tech#L5202 instead? |
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
I don't get why this diff is showing as being so large? Is there a whitespace change or something?
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
@proppy : All data for variant B (ReRAM support) is derived from values for variant A by adjusting for the height difference of metals starting at metal2 (plus the via between metal1 and metal2 doubles in height and therefore doubles in resistance). I was hoping we could get measured values, but I suppose I should publish all values in the spreadsheet and make a note that they are simply derived values based on the known difference in the metal stack. |
Fixes #359
TESTED=https://skywater-pdk--377.org.readthedocs.build/en/377/rules/rcx.html#resistance-values