[ibis-macro] Re: A new IBIS 5.1 Issue
- From: "Walter Katz" <wkatz@xxxxxxxxxx>
- To: <tom@xxxxxxxxxxxxx>, "'IBIS-ATM'" <ibis-macro@xxxxxxxxxxxxx>
- Date: Mon, 19 Sep 2011 17:17:48 -0400 (EDT)
Tom,
I was referring to Rx [Model] that also had an algorithmic model section,
specifically the following example:
[Model] Rx
| differential model
Model_type Terminator
| typ min max
C_comp .2pF .2pF .2pF
| typ min max
[Rpower] 50 45 55
[Temperature Range] 70 120 -40
[Voltage Range] 1.8 1.6 2.0
|
[Algorithmic Model]
Executable Windows_VisualStudio8.0_32 Rx.dll Rx.ami
[End Algorithmic Model]
|
[GND Clamp]
|
| Voltage I(typ) I(min) I(max)
|
.
|
[POWER Clamp]
|
| Voltage I(typ) I(min) I(max)
|
.
[Algorithmic Model]
Executable Windows_VisualStudio8.0_32 IBIS_AMI_RX_HPHY.dll
IBIS_AMI_RX.ami
[End Algorithmic Model]
Walter
From: Tom Dagostino [mailto:tom@xxxxxxxxxxxxx]
Sent: Monday, September 19, 2011 5:06 PM
To: wkatz@xxxxxxxxxx; 'IBIS-ATM'
Subject: RE: [ibis-macro] Re: A new IBIS 5.1 Issue
Walter
A terminator model can have from a very low impedance to an infinite
impedance to ground (or a voltage). When using the Bus Switch model in
IBIS the pins are assigned a terminator model and the bus switch model is
picked up in the series model section. The kind of IC that I am
contemplating is my question would have two or more differential inputs
routed to a single differential output pin or used in the opposite
direction, one input and multiple outputs. These are available now for
many applications. I've worked with several for HDMI/DVI applications.
A typical application could be multiple DVI inputs on a display feeding a
single receiver in the display.
So, my question is would forbidding a Terminator model at the receiver
disallow a bus switch at the receive end?
Tom Dagostino
Teraspeed Labs
9999 SW Wilshire St.
Suite 102
Portland, OR 97225
USA
971-279-5325 Office
971-279-5326 FAX
503-430-1065 Cell
tom@xxxxxxxxxxxxx
www.teraspeed.com <http://www.teraspeed.com/>
Teraspeed Consulting Group LLC
121 North River Drive
Narragansett, RI 02882
401-284-1827
From: ibis-macro-bounce@xxxxxxxxxxxxx
[mailto:ibis-macro-bounce@xxxxxxxxxxxxx] On Behalf Of Walter Katz
Sent: Monday, September 19, 2011 1:40 PM
To: tom@xxxxxxxxxxxxx; 'IBIS-ATM'
Subject: [ibis-macro] Re: A new IBIS 5.1 Issue
Tom,
A Terminator is something that goes to ground (or a voltage). An AMI "Bus
Switch" would have both a differential input and a differential output. I
assume you mean by a buss switch something that had one differential input
and multiple differential outputs, or one differential output and multiple
differential inputs. The Repeater BIRD that I introduced to IBIS (BIRD
131). Is a "Bus Switch" with one input and one output.
Walter
From: Tom Dagostino [mailto:tom@xxxxxxxxxxxxx]
Sent: Monday, September 19, 2011 4:26 PM
To: wkatz@xxxxxxxxxx; 'IBIS-ATM'
Subject: RE: [ibis-macro] A new IBIS 5.1 Issue
Walter
Would prohibiting Terminator disallow a Bus Switch in the path?
Tom Dagostino
Teraspeed Labs
9999 SW Wilshire St.
Suite 102
Portland, OR 97225
USA
971-279-5325 Office
971-279-5326 FAX
503-430-1065 Cell
tom@xxxxxxxxxxxxx
www.teraspeed.com <http://www.teraspeed.com/>
Teraspeed Consulting Group LLC
121 North River Drive
Narragansett, RI 02882
401-284-1827
From: ibis-macro-bounce@xxxxxxxxxxxxx
[mailto:ibis-macro-bounce@xxxxxxxxxxxxx] On Behalf Of Walter Katz
Sent: Monday, September 19, 2011 11:27 AM
To: IBIS-ATM
Subject: [ibis-macro] A new IBIS 5.1 Issue
All,
We have received an IBIS file with an AMI Rx that has Model_type
Terminator.
It was always my understanding that an AMI Tx [Model] would be Model_Type
Output (or Output_diff), and an AMI Rx [Model] would be Model_Type Input
(or Input_diff).
IBIS 5.0 is not clear on this. Would you like a BIRD for 5.1 that
explicitly says that Model_type Terminator is allowed or not permitted for
AMI Rx [Model]s?
Walter
Walter Katz
wkatz@xxxxxxxxxx
Phone 303.449-2308
Mobile 720.333-1107
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