@User Where can I find a 1KB, DRC clean, sky130, OpenRAM? When I try to open the

sky130_sram_1kbyte_1rw1r_32x256_8.gds

file in the Magic, nothing happens and I get following errors:

...
Error while reading cell "sky130_fd_bd_sram__openram_dp_cell_cap_row" (byte position 112036): Unknown layer/datatype in boundary, layer=33 type=43
Error while reading cell "sky130_fd_bd_sram__openram_dp_cell_cap_row" (byte position 112996): Unknown layer/datatype in boundary, layer=22 type=21
Error while reading cell "sky130_fd_bd_sram__openram_dp_cell_cap_row" (byte position 115364): Unknown layer/datatype in boundary, layer=33 type=42
...
Error while reading cell "sky130_fd_bd_sram__openram_dp_cell_dummy" (byte position 123758): Unknown layer/datatype in boundary, layer=22 type=22
Error while reading cell "sky130_fd_bd_sram__openram_dp_cell_dummy" (byte position 129694): Unknown layer/datatype in boundary, layer=33 type=43
Error while reading cell "sky130_fd_bd_sram__openram_dp_cell_dummy" (byte position 134470): Unknown layer/datatype in boundary, layer=22 type=21
Error while reading cell "sky130_fd_bd_sram__openram_dp_cell_dummy" (byte position 140044): Unknown layer/datatype in boundary, layer=33 type=42
Error while reading cell "sky130_fd_bd_sram__openram_dp_cell_dummy" (byte position 144236): Unknown layer/datatype in boundary, layer=235 type=0
Reading "sky130_fd_bd_sram__openram_dp_cell_replica".
Error while reading cell "sky130_fd_bd_sram__openram_dp_cell_replica" (byte position 150618): Unknown layer/datatype in boundary, layer=22 type=22
Error while reading cell "sky130_fd_bd_sram__openram_dp_cell_replica" (byte position 156746): Unknown layer/datatype in boundary, layer=33 type=43
Error while reading cell "sky130_fd_bd_sram__openram_dp_cell_replica" (byte position 161522): Unknown layer/datatype in boundary, layer=22 type=21
Error while reading cell "sky130_fd_bd_sram__openram_dp_cell_replica" (byte position 167768): Unknown layer/datatype in boundary, layer=33 type=42
Error while reading cell "sky130_fd_bd_sram__openram_dp_cell_replica" (byte position 171960): Unknown layer/datatype in boundary, layer=235 type=0
Reading "sky130_fd_bd_sram__openram_dp_cell".
Error while reading cell "sky130_fd_bd_sram__openram_dp_cell" (byte position 178334): Unknown layer/datatype in boundary, layer=22 type=22
Error while reading cell "sky130_fd_bd_sram__openram_dp_cell" (byte position 184462): Unknown layer/datatype in boundary, layer=33 type=43
Error while reading cell "sky130_fd_bd_sram__openram_dp_cell" (byte position 189238): Unknown layer/datatype in boundary, layer=22 type=21
Error while reading cell "sky130_fd_bd_sram__openram_dp_cell" (byte position 195484): Unknown layer/datatype in boundary, layer=33 type=42
Error while reading cell "sky130_fd_bd_sram__openram_dp_cell" (byte position 199676): Unknown layer/datatype in boundary, layer=235 type=0
...

@User Are those the same that are installed with pdk? Right now I'm using those installed with PDK and I'm getting 3M+ DRC errors while hardening and 16 violation for precheck after maglef substitution. Is that somehow expected?

@User Memories use "core" design rules which are not the same as the user rules. These will not pass DRC using the magic DRC deck

Is there a way to somehow apply different DRC rules for openram macro than to user area (rest of a project) or just forget about that?

@User No, unfortunately

Ahh, I see, there's some magic missing in magic still 😉

@User I can't really, sorry. I'm not taping out this MPW so I haven't kept up to date on the changes since MPW2

@User Np. Will need to learn more by myself. Thanks!

@User I’m still getting the same errors. Do I missing something (e.g. installing a library in the pdk)?

How about klayout?

@User I’ll give it a try

@User In addition I installed sram macros during PDK installation ("make pdk")

@User May I ask how did you exactly do that? I tried different ways with no luck.

before "make pdk", you need to "export INSTALL_SRAM=yes" or "export INSTALL_SRAM=<PATH_where_you_want_sram_macros>"

NICE! Thank you very much.

You can check if you have macros installed in $PDK_ROOT/sky130A/libs.ref/sky130_sram_macros

I usually use the -T flag to point to the tech file. Do I also need .magicrc?

I was doing it like this: magic -rcfile $PDK_ROOT/sky130A/libs.tech/magic/sky130A.magicrc

That was SOOOOO much helpful. Thanks a million! 🙏

And I'm also not able to open 1kB sram gds file with magic (with message "Don't know how to read GDS-II: Nothing in "cifinput" section of tech file.") despite being able to do that for my design with sram embedded as a macro

I’m working on ur instr. I’ll be right back to u with the results.

@User are you able to open any gds file in magic?

Yes, I'm able to open my hardened project based on caravel_user_project template where I placed 1kB openram as a macro

Is it reading your magicrc file for the technology? Sounds like it isn't read

I see "Technology: SKY130A" in top bar and non-empty list of layers on the right

Did you select it (s) and expand (x)?

magic -rc $PDK_ROOT/sky130A/libs.tech/magic/sky130A.magicrc sky13 0_sram_1kbyte_1rw1r_32x256_8.gds

What isy our md5sum of the 1kbyte? b9a553e942f9675f70ea32d597624cd4 sky130_sram_1kbyte_1rw1r_32x256_8/sky130_sram_1kbyte_1rw1r_32x256_8.gds

If I do

load sky130_sram_1kbyte_1rw1r_32x256_8

after loading the gds I can see the cell (despite the unknown layers):

@User Do we need to load additional tech file for SRAM in magic tool ?

@User no, but there are methods to use maglef for performing DRC. This is an OpenLane question though...

@User md5sum sky130_sram_1kbyte_1rw1r_32x256_8.gds 09384e5d6958f53ba22c5ce29a2467ba sky130_sram_1kbyte_1rw1r_32x256_8.gds

@User oops, that is right. I was looking at an older one. However, Maximo has solved your issue above, I think.

@User Yeah, but I wanted to double check I'm using correct version of GDS for 1kB sram. Thanks!

(I previously checked my mpw2 submission, but there were updates since then)

@User Do you know what is this file sram_1rw1r_32_256_8_sky130.gds and why is it placed with macros?

That was the first prototype that is used in the storage array, I believe.

Thanks! I'm not using this one, but was just wondering