Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

what's the difference between cell_rise & rise_transiti

Status
Not open for further replies.
B

bendrift

Member level 4
Member level 4
Joined
Nov 18, 2004
Messages
74
Helped
5
Reputation
10
Reaction score
4
Trophy points
1,288
Activity points
688
cell_rise

in lib ,like the following :
cell_rise(lu5X5) {
values("0.057, 0.079, 0.175, 0.269, 0.433",\
"0.196, 0.217, 0.345, 0.482, 0.712",\
"0.353, 0.374, 0.497, 0.661, 0.932",\
"0.824, 0.845, 0.961, 1.119, 1.454",\
"1.607, 1.629, 1.741, 1.891, 2.210") ;
}
rise_transition(lu5X5)
values("0.100, 0.103, 0.184, 0.269, 0.411",\
"0.414, 0.414, 0.451, 0.574, 0.773",\
"0.775, 0.775, 0.775, 0.860, 1.102",\
"1.856, 1.856, 1.856, 1.856, 1.957",\
"3.657, 3.657, 3.657, 3.657, 3.657") ;
}
what 's the difference between cell_rise & rise_transition?thank u :)
 

cell_rise rise_transition

Cell_rise is used to know the cell delay by looking into input transition and its corresponding output load.

Rise_transition is used to calculate output transition time(which will be input transition time for next cell )
 
rise_transition

suppose max_capacitance is .033pf
n tech lib used is slow.db

how is optimization taking place ... ??
my netlist ws 2 cells of OAI21XL and 2 cells of AND21x (not sure of and gate name)

when i compiled n gave report_constraint -max_capacitance -verbose

at out1 ..
capacitance ws .002398 (some thing of this sort)

how to C this value in slow.lib ?

fall_transition n cell_fall ....... y hav they given different look up tables????????????????
thanq
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top