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Whats the difference between RTL PKS synthesis?

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p_shinde

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RTL Vs PKS

hi,


whats the diff betwn RTL synthesis and PKS synthesis,

which one's output is given as input to SOC Encounter , RTL one's or PKS one???


thanks,
Prasad
 

RTL Vs PKS

RTL compiler output is going SOC encounter
PKS tool is now going to absoluted.
But it is used in physical synthesis in encounter 4.2
 

Re: RTL Vs PKS

didnt get u ? what about DC, PKS?
 

RTL Vs PKS

DC is not physical synthesis tool
for physical synthesis tool need .lef .
instead wireload model PKS will take real RC value from .lef file
 

Re: RTL Vs PKS

PKS ( or physical synthesis in simple) is an improvement in synthesis process that is requirment in nano-meter processes.
In old method of RTL synthesis for ASIC, in synthesis stage, the delay of interconnects between cells were estimated by wire-load method. This method is based on statitical method, and load of every driver pin is a function of its fanout and also the physical dimentions of design. But this estimations are not acceptable for nano-meter technologies.

In physical synthesis, the synthesis tool places the std. cells in synthesis stage of design, and now can it can have a better estimation for routings between nodes. This yield better estimation of loads. So the placement stage is moved from place and route to synthesis stage. This is called physical synthesis!
 

Re: RTL Vs PKS

Dear p_shinde

PKS synthesis is with CWLM and DC may or may not require WLM.
 

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