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spectre save statements

Is there any comprehensive documentation spectre save statements. I may be missing something, but I do not find all the info in spectre -h save.

Specifically some explanation on wildcards and also all the different thigs that can be saved.

I also found that the subckt paramater did not work as I expected. If I have block C instantiated in block B which is instantiated in Block A. Block C has pins VDD, GND, INPUT, and OUTPUT. VDD and GND are signals that exist at the top-level Block A. They follow the heiarchy down to connect to block C. If I use the following statement it does not seem to work

save VDD subckt=C

I assume this is because VDD is a net on a higher level. I would hope this save statement would work, since it would make it easy to save all VDD nodes connected to instantiations of C without having to know what they are called. This would be consistent with assertion syntax.

Finally, if I use asserts do I have to explicitly save the nodes I use for assertions(In tran analysis). It looked to me like it worked without this. Do nodes/currents called by assertions get automatically saved. This would be a nice feature.

FYI I am using spectre 7.1.1.221

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archive over 15 years ago

Hi,
You should be able to get more information on Wildcarding in Save statements in the following link.
http://sourcelink.cadence.com/docs/files/Release_Info/Docs/spectreuser/spectreuser7.1.1/chap8.html#838518
Regarding "save VDD subckt=c", since the same signal is passed from A to C, Spectre will save VDD in top level A and not inside C. If you want the value of VDD saved in subckt C, you can use,
save I1.I2.VDD //I1.I2 is the hierarchical name to subckt C.
Regarding assert statements, yes, spectre will save node voltages, currents required to solve assert statements even if nothing is saved. However, these signals won't be seen in PSF.
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archive over 15 years ago

Hi,
You should be able to get more information on Wildcarding in Save statements in the following link.
http://sourcelink.cadence.com/docs/files/Release_Info/Docs/spectreuser/spectreuser7.1.1/chap8.html#838518
Regarding "save VDD subckt=c", since the same signal is passed from A to C, Spectre will save VDD in top level A and not inside C. If you want the value of VDD saved in subckt C, you can use,
save I1.I2.VDD //I1.I2 is the hierarchical name to subckt C.
Regarding assert statements, yes, spectre will save node voltages, currents required to solve assert statements even if nothing is saved. However, these signals won't be seen in PSF.
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