[ibis-macro] Re: Node ordering for IBIS buffer building blocks
- From: "Muranyi, Arpad" <arpad.muranyi@xxxxxxxxx>
- To: <ibis-macro@xxxxxxxxxxxxx>
- Date: Mon, 3 Oct 2005 16:26:06 -0700
Scott,
Thanks for your input on this one. Just a comment, the library
being Verilog-A (without mixed signal) will have only analog
ports. Notice that I put the word "digital" in quotes in my
message.
Arpad
================================================================
-----Original Message-----
From: Scott McMorrow [mailto:scott@xxxxxxxxxxxxx]
Sent: Monday, October 03, 2005 2:13 PM
To: kwillis@xxxxxxxxxxx
Cc: Muranyi, Arpad; ibis-macro@xxxxxxxxxxxxx
Subject: Re: [ibis-macro] Re: Node ordering for IBIS buffer building blocks
Ken
I would agree, if your terminal ordering was intuitive. You'd have to
admit that anyone would be hard pressed to come up with an ordering that
is more odd than this one.
I generally like the following sort of ordering
stimulus and control pins
stimulus supply rail pins
output pins
output supply rail pins
If there are no specific inputs supply rail pins, then the order would be
stimulus and control pins
output pins
output supply rail pins
I also would like all ports to be Analog in the declarations, since
that's what they are in reality.
Scott
Scott McMorrow
Teraspeed Consulting Group LLC
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Ken Willis wrote:
>Hi Arpad,
>
>In the templates I sent, you can see the node ordering that CDS uses in
>our B-elements. I included them as comments right in the model file, so
>you can see how it is set up. It would make sense to me to use this same
>ordering, as we are providing the templates. It is attached below.
>
>Ken
>
>
>
>* The terminals in an 8-terminal differential MacroModel are as
>follows:
>* power = 1
>* outp = 2
>* ground = 3
>* input = 4
>* enable = 5
>* power_clamp_reference = 6
>* ground_clamp_reference = 7
>* outn = 8
>
>
>
>
>
>
>
>
>
>-----Original Message-----
>From: ibis-macro-bounce@xxxxxxxxxxxxx
>[mailto:ibis-macro-bounce@xxxxxxxxxxxxx] On Behalf Of Muranyi, Arpad
>Sent: Monday, October 03, 2005 1:32 PM
>To: ibis-macro@xxxxxxxxxxxxx
>Subject: [ibis-macro] Node ordering for IBIS buffer building blocks
>
>Hello,
>
>I have a question about the order of the nodes for the IBIS buffer
>building blocks in the library. What should be our convention?
>
>1) Should we follow the order of nodes as it is done in the
> HSPICE B-elements?
>2) Should we have any other ordering scheme? For example, have
> the "digital" (i.e. control) nodes first, such as In_D, En_D,
> Rcv_D, and then the analog ports?
>3) Any other suggestions?
>
>Thanks,
>
>Arpad
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