Subject: Re: auto insertion of interface elements
From: Kevin Cameron (dkc@galaxy.nsc.com)
Date: Thu Dec 06 2001 - 11:32:18 PST
Peter Liebmann wrote:
> The attached microsoft word document is how we interpret the LRM for the
> insertion of interface elements, and how its methology relates to ours.
>
> I can send a pdf version if requested.
> ...
Comments/Questions..
Page 4:
> As far as placement goes, it really does not matter where you put the D2a as long as it is attached to the proper analog node (NOTE: I did not discuss back-annotation here, maybe placement is important in that case).
As I said in response to Jon's presentation, it is important with respect to scoping within the Verilog, e.g. if you need to find local Vdd/Vss for the connect module. It's more important with back-annotation for modelling noise and droop, but needs to work that way anyway for doing power calculations etc.
pre-route. Secondly it is good to have a fixed relationship between the module instance containing the (digital) driver and its associated D2A for
debugging e.g. <instance path>.<signal>.$d2a (which should be invariant with back-annotation).
Page 5:
> Note that the load split case is the same as the merge since it does not make sense to split disciplines of different thresholds
I'm not sure I understand that - isn't the reverse true.
[Note: I prefer "receiver" to "load" because an A2D probe may not actually load the circuit.]
Kev.
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