[ibis-interconn] Comments - RE: EMD Draft 28 and Micron Example
- From: "Bob Ross" <bob@xxxxxxxxxxxxxxxxx>
- To: "'IBIS-Interconnect'" <ibis-interconn@xxxxxxxxxxxxx>
- Date: Wed, 18 Dec 2019 10:55:32 -0800
All,
Some quick comments related to draft28:
Page 24 top Delete A_gnd (under Qualifier_entry) and move the text about
A_gnd to the Terminal_type section: (as shown on page 304-305 of IBIS V7.0)
· A_gnd
Terminal_type A_gnd defines a connection to the simulator global reference
node. The A_gnd node can be used at any interface.
Terminal_type A_gnd is not required under File_TS or File_IBIS-ISS.
If present under File_TS, Terminal_type A_gnd may be used only once on the
N+1th terminal line.
If present under File_IBIS-ISS, Terminal_type A_gnd may be used any number
of times on any of the terminal lines.
At page 25:, add the A_gnd bullet and text, as shown on 310 of IBIS V7.0
§ At any interface
· Terminal_type A_gnd is available at any interface and without any
Terminal_type qualifier
Page 25, table 41:
Add the A_gnd line similar to Table 47, page 310
Merge the Aggressor_Only cell and the blank cell below it to show the
Aggressor_Only entry on the same line as the qualifier entries.
---
I have other concerns, but will try to state them later
-----------
Technical Issue with Micron sample: Snipped entries related to DQ0 show
that signal_name entries do not match
[EMD Pin List] signal_name signal_type bus_label
A3 UDQ0
G2 LDQ0
[End EMD Pin List]
[Designator Pin List] signal_name signal_type bus_label
U0.51 DQ0 | signal_name should be LDQ0
U1.51 DQ0 | signal_name should be UDQ0
[End Designator Pin List]
[EMD Set] Uncoupled_Signal_Nets_ISS
[Manufacturer] Micron Technology, Inc.
[Description] EMD models are uncoupled nets with IBIS-ISS subcircuits
|
[EMD Model] UDQ0
File_IBIS-ISS z11bx16_2cob_ddp_iss_files/z11bx16_2cob_ddp_UDQ0.iss
Number_of_terminals = 3
1 Pin_I/O pin_name A3 | UDQ0
2 Pin_I/O pin_name U1.51 | DQ0
3 Pin_Rail signal_name VSS
[End EMD Model]
[EMD Model] LDQ0
File_IBIS-ISS z11bx16_2cob_ddp_iss_files/z11bx16_2cob_ddp_LDQ0.iss
Number_of_terminals = 3
1 Pin_I/O pin_name G2 | LDQ0
2 Pin_I/O pin_name U0.51 | DQ0
3 Pin_Rail signal_name VSS
[End EMD Model]
[End EMD Set]
--------
If models were combined, the signal_name associations with UDQ0 and LDQ0 are
ambiguous
(In in fact only U0.51 and U1.51 are associated with each other, but not to
any EMD interface pin
except through the IBIS-ISS electrical model)
The [Designator Pin List] signal_names need to match the [EMD Pin List]
names to show associations.
[EMD Model] DQ0
File_IBIS-ISS z11bx16_2cob_ddp_iss_files/z11bx16_2cob_ddp_DQ0.iss | new
file name
Number_of_terminals = 5
1 Pin_I/O pin_name A3 | UDQ0
2 Pin_I/O pin_name U1.51 | DQ0 | should associate with UDQ0
3 Pin_I/O pin_name G2 | LDQ0
4 Pin_I/O pin_name U0.51 | DQ0 | should associate with LDQ0
5 Pin_Rail signal_name VSS
[End EMD Model]
Bob
From: ibis-interconn-bounce@xxxxxxxxxxxxx
[mailto:ibis-interconn-bounce@xxxxxxxxxxxxx] On Behalf Of Walter Katz
Sent: Wednesday, December 18, 2019 9:02 AM
To: IBIS-Interconnect
Subject: [ibis-interconn] EMD Draft 28
Walter Katz
<mailto:wkatz@xxxxxxxxxx> wkatz@xxxxxxxxxx
Office 978.461-0449 x 133
Mobile 720.417-3762
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