Subject: Re: [vhdl-200x-mp] Analog/Digital conversion
From: Paul J. Menchini (mench@mench.com)
Date: Tue May 06 2003 - 10:08:50 PDT
Kevin,
>> Are the facilities of VHDL-AMS insufficient?
> Since VHDL-AMS doesn't provide access to driver waveforms or
> "conversion modules" I'd say it's insufficient, but I don't think it's
> particularly difficult to add that functionality.
I was under the impression that VHDL-AMS had the equivalent of
conversion modules, but it's been several years since I looked at the
language in detail. Peter Ashenden may wish to comment....
> BTW, is my understanding that VHDL does hierarchical signal resolution
> correct (a signal is resolved locally and the result passed up, and
> the effective value propagated back from the top)?
Signal resolution occurs at each level in the hierarchy where a signal
in the net is of a resolved type. Driving values are propagated upwards
to the root signal. The driving value of the root signal becomes its
effective value, and that effective value is then propagated down to the
leaves.
Paul
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