<@U016EM8L91B> is there a reason `all.spice` doesn't include `W3p40L3p40`

Tom

05/04/2021, 5:34 PM

@User is there a reason

all.spice

doesn't include

W3p40L3p40

Tim Edwards

05/04/2021, 5:36 PM

No, I don't. We inherited that from SkyWater. I wrote

sky130.lib.spice

to take care of most of the issues of files that don't get included from

all.spice

Tom

05/04/2021, 5:36 PM

@Tim Edwards Sorry that was a terrible attempt at a question - the PNP device in the open_pdks build of aky130A only seems to include the

W0p68L0p68

PNP device but not the

W3p40L3p40

. Is there any particular reason for that?

Tom

05/04/2021, 5:38 PM

i see. Do you know of any reason that I shouldn't use it? or should I modify my design to use the one which is included?

Tim Edwards

05/04/2021, 5:39 PM

The 0.68x0.68 and 3.4x3.4 devices got somehow very screwed up by the scripts that generated the open PDK from the SkyWater sources. Only the 0.68x0.68 device is currently in the PDK, and it is variously referenced as either "0p68" or "3p40". I need to sort all that out and write a patch file to fix it.

Tim Edwards

05/04/2021, 5:40 PM

First, make sure that you're simulating with the right device. If so, and if you need the 3.4x3.4 device, then I'll go dredge it up from the SkyWater sources and write the patch file.

Tom

05/04/2021, 5:43 PM

I can probably switch to the 0.68 device without too much trouble. Do you think that would be the safest option?

Tim Edwards

05/04/2021, 5:46 PM

I honestly have no idea. I can't let the repository sit in the state of having mixed-up references to the two devices, so I need to do something about it.

Tom

05/04/2021, 5:48 PM

Ok thanks. Is that something you're planning on doing in time for this shuttle?

Tim Edwards

05/05/2021, 12:51 AM

@Tom: Yes, and I just updated open_pdks with a correction a few minutes ago (to the opencircuitdesign.com repository, as usual, with the github mirror updating in about 6 hours). With the update, you should be able to use either the 0.68x0.68 or the 3.4x3.4 devices, and the views should all be consistent.

Tom

05/05/2021, 1:00 AM

Thanks @Tim Edwards!! I'm pulling it in right now to give it a try

Tom

06/03/2021, 3:44 AM

@Tim Edwards, just to follow up on this - even with the latest version of open_pdks, in order to simulate with the

pnp_05v5_W3p40L3p40

I've had to add the line

Copy code

.include "../../libs.ref/sky130_fd_pr/spice/sky130_fd_pr__pnp_05v5_W3p40L3p40.model.spice"

Under the line:

Copy code

.include "../../libs.ref/sky130_fd_pr/spice/sky130_fd_pr__pnp_05v5_W0p68L0p68.model.spice"

all.spice

. Did you leave it out while making the changes or is there a different way you intend for me to be including the model?

Tim Edwards

06/03/2021, 1:08 PM

Don't include

all.spice

. Instead, you should be using

.lib <path_to>/sky130A/libs.tech/ngspice/sky130.lib.spice <corner>

. The

sky130.lib.spice

file is what pulls in all of the models (

all

is not all. . .).

Tom

06/03/2021, 4:05 PM

@Tim Edwards so I am actually using

sky130A/libs.tech/ngspice/sky130.lib.spice

as you say and that includes

all.spice

but the 3.4 PNP device model is not included

Tim Edwards

06/03/2021, 4:08 PM

Oh, okay. I'll make a patch for the lib.spice file.

Tom

06/03/2021, 4:08 PM

Great cheers

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