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14 Threads found on Cts Spec
Hi all, Can any one tell me which constraints written out by DC, like set_clock_latency/ set_clock_transition/ set_clock_uncertainty, will affect the clock spec generation in cts stage? The generated Clock.ctstch looks like below: AutoctsRootPin clkgen_m/u6/Z Period 40ns MaxDelay 0.01ns # sdc (...)
Hi all, im using cadence encounter. For cts we give tool, clock tree spec file that has inputs like min phase delay , max phase delay and max skew paramters etc. My understanding is that Max skew parameter that we are mentioning is of Global skew but not local skew. My question is Why mention Global skew numbers when u already provide tool min
HI, I am working on cts for one of the macro and the macromodel definition is not working for it. It is defined in cts spec file as: MacroModel pin mem/CLK 0.2ns 0.2ns 0.2ns 0.2ns 0.2pf func_WC The error in the logfile is Switching off Advanced RC Correlation modes in AAE mode. Total Macromodels Extracted = 0 Active Analysis (...)
hello, when i m giving max delay and min delay then what is the use of giving skew..... (mainly in cts spec) may be small question....i scratched my head.......
oh, that some basic stuff: 1- write spec/verification plan 2- write RTL & TB 3- write tests (simulation) 4- this code could test ON FPGA or CPLD (two differents technologies, depend of your goal) 5- synthesis/DFT to your technology target 6- place/cts/hold/Route 7- STA 8- along 5-6-7, LEC & ATPG 1 to 3 is mainly the frontend 5 to 8 is m
Dear all, I want to build buffer tree for signal RESET like other clock nets,as so many max_tran vios occurred on this net under bc condition. I add clock constrainst (skew,latency...) into clock spec file and then do cts,tool reports that,clock net RESET does not have syn pin,and can not trace clock ne
In Encounter cts spec file Came Across CellHalo for Clock Buffers? I need to know the use of it
you need to set an exclude point in your clock spec on the output of your mux to the long path (check manual for syntax). This way cts will not try to balence the two paths.
you can set contraints in your cts spec file and try with that ....
a few things ... 1) It sounds like your clock is not tracing through your pad model. Check the .lib model of the pad to see if a) pin C is an output abd b) through is an arc from PAD -> C. Look for pin PAD then look for related_pin C. 2) For cts you can define your clock root at the output of the pad cell to the core (pin C) like this: ##
Hi guys, while using SoC encounter, I didn't quite understand a couple of options you can provide the cts engine with: - clkgroup (the sinks of all clock root pins listed in a ClkGroup statement will meet the maximum skew value set in the clock tree specification file. Clock grouping inserts delays to balance the clocks, and attemps to
sivamit, laktronics is correct. For example, the RS232 spec defines voltage levels for 1s and 0s (referred to as "space" and "mark") for the Rx (Receive) and Tx (Transmit) lines. It also defines levels for various control signals, such as cts, RTS, etc. It also defines a connector and pin assignments. However it does not mention how these sign
SVP design: .v .lib .sdc .lef (io file, toggle file, cts spec) Power analysis: voltagestorm library file Extraction: Same lib with voltagestorm SI: .cdB file (celtic) GDS: layer map file.
You should able to do sroute before cts or placement. And sroute should not need the clock tree spec file.