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Subject: How to get area results in Micron
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shami
Posts: 1
Online: User is Offline
4/28/2008 3:37 AM  
Hi everyone.
While synthesizing a small design in RTL compiler i came across this problem. I want the actually physical area. But report area command gives me number of cells and their total area, without any unit.

I searched the mannuals and found this "get_attribute fplan_height/fplant_width design" command but this commands give me "no value". Does anyone of you have any clue how to get physical area? Total area and if possible width and height of the design.

I also used get_attribute with aspect_ratio and it gives me aspect ratio= 1.0000 (althought looking at the schematic i dont think that the aspect ratio is 1)

Thanks in advance.
Shami
grasshopper
Posts: 48
Online: User is Offline
4/28/2008 10:41 AM  
Hi Shami,

area numbers come from the LEF or LIB files depending on whether you are using PLE or WLM for modelling wire effects. Frequently libraries use some relative unit and you would have to do the conversion manually or with the math in TCL. The aspect_ratio has nothing to do with the schematic. It has to do with the DEF if you read one or you can overwrite it manually if I am not mistaken. It is of no consequence if you are not using PLEs as far as I know. I belive it is x/y or y/x - I can never remember which one is the first dimension but it is the same as first encounter. The attributes you mentioned also come from the DEF files if you read one that is why they would be none if you do not read a DEF.

hope this helps,
gh-
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Forums > Digital IC > Synthesis and test > How to get area results in Micron


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