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https://designers-guide.org/forum/YaBB.pl Simulators >> AMS Simulators >> Dout looks HiZ for E2L_2_inhconn https://designers-guide.org/forum/YaBB.pl?num=1333257097 Message started by ywguo on Mar 31st, 2012, 10:11pm |
Title: Dout looks HiZ for E2L_2_inhconn Post by ywguo on Mar 31st, 2012, 10:11pm Hi Guy, It is weird that Dout is always kept HiZ during the simulation. The code is almost the same as that E2L_2_inhconn in built-in connectLib. I paste the code in the following. Code:
The always block @(Dout) and @(Dreg) are for monitoring the toggle of Dout and Dreg. It is curious that Dout is always HiZ although Dreg toggles. My tools are IC6.1.4.500.10, and MMSIM 11.1.0.249.isr2, and INCISIVE 10.20-s043. Any comments are appreciated. Yawei |
Title: Re: Dout looks HiZ for E2L_2_inhconn Post by ywguo on Mar 31st, 2012, 10:30pm The following is part of irun.log. Code:
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Title: Re: Dout looks HiZ for E2L_2_inhconn Post by boe on Apr 2nd, 2012, 11:53am Ywguo, Is the power supply OK? I remember seeing some very weird behavior without power (although I think it was an L2E-CM). - B O E |
Title: Re: Dout looks HiZ for E2L_2_inhconn Post by ywguo on Apr 8th, 2012, 7:25pm B O E, I looked at the simulation again. The supply is OK, otherwise the circuitry malfunctions. Although Dout in E2L_2_inhconn is HiZ, the succeeding verilog modules (inverters and DFFs) work very well. :( Best Regards, Yawei |
Title: Re: Dout looks HiZ for E2L_2_inhconn Post by rsmithuf on May 22nd, 2012, 8:45am I am also having this problem with the Dout of E2L's staying HiZ although Dreg is toggling. I am using the E2L_0 builtins. Was there any resolution or clue to this? Thanks! |
Title: Re: Dout looks HiZ for E2L_2_inhconn Post by ywguo on May 22nd, 2012, 6:36pm Hi rsmithuf, I have not making any progress in this problem. :( Best Regards, Yawei |
Title: Re: Dout looks HiZ for E2L_2_inhconn Post by rsmithuf on May 23rd, 2012, 11:20am So I find that when I probe the E2L's internal signals (Dout, Ain, etc) the Dout is always 'Z'. However, if you look at the cell that this signal is connected to, it is properly resolving to a '0' or '1' depending on the connect rules used. |
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