IBIS BIRD70.2 Comments

To All:

Greg Edlund recently issued IBIS BIRD70.2 for Golden Waveforms.

It was issued as a revised BIRD70.1, but it is uploaded
as BIRD70.2 under:

  http://www/eda/org/pub/ibis/birds/

My general comment (that has been shared privately already
with Greg) is that BIRD70.2 should be extended to cover
differential Golden Waveforms in a more robust and useful
manner. The overall criteria should be: Does it support
all of the commonly used technologies today (SSTL-*, LVDS,
etc.)? Also, BIRD70.2 should support some cases where the
inverting driver or the inverting receiver can be different
than the non-inverting driver or receiver.

BIRD70.2 already proposes a fairly useful and general
test configuration for Single-ended loads and tests. I
believe only a few additions are need to make it useful
for general Differential tests.

Under [Test Load], I would make these changes:

  Add Receiver_model_Inverting | Optional

Under [Test Load]

  Add Driver_model_Inverting | Optional
 
Add a section for

  [Differntial Waveform Near]
  [Differntial Waveform Far]

There may be some other parameters needed related to
some of the threshold and timing details, but I need to
study this further.

Bob Ross
Mentor Graphics
 
Received on Thu Apr 19 16:33:25 2001