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Explanation of .lib, .lef, .DEF, .tf formats

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vreddy

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lef, def and liberty format

wat .lib, .lef, .DEF, .tf consists of ??

i know but still i wanna know in depth....

thanx
 

sree205

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tlf tf synopsys

.lib contains the timing information of the cells.
.lef contains the physical information.

i think u mean .tlf and not .tf, .tlf as far as i know, also has timing information only.

.def is what we use in between steps (fp, routing etc).
 

vreddy

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Re: format

hey sree,

wta u said was right but wat def will do??

its design exchange format/?? or data exchange format??
 

sree205

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format

its design exchange format. it conveys the physical design information. like i said, if u r using a p&r tool, if u floorplan and do placement, u can save it in def format. this can be imported again to complete the rest of the steps.
 

    vreddy

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jackson_peng

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format

.lib: cell timing, area, power info
.lef: technology info + cell geometry info
.def: design netlist + geometry info
.tf: technology info, which is only for synopsys usage.

cadence uses: .lib, .lef, .def for library and design
synopsys uses: .lib, .tf, .pdef, Milkyway for library and design.
 

cvbn

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format

Thanks a lot
 

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