mirror of
git://projects.qi-hardware.com/xue.git
synced 2024-11-07 08:05:55 +02:00
50 lines
3.0 KiB
Plaintext
50 lines
3.0 KiB
Plaintext
2Gb DDR2 SDRAM IBIS models
|
|
|
|
The u49a IBIS models include On Die Termination (ODT) characteristics. ODT is
|
|
modeled through the use of [Submodel] power and ground clamp I-V curves that
|
|
add the termination characteristics to the regular power and ground clamp
|
|
characteristics when the I/O is functioning as an input. ODT applies to the
|
|
DQ, DQS/DQS#, RDQS/RDQS#, and DM signals. Use the [Model Selector] to choose
|
|
between 50, 75, or 150 ohm ODT settings.
|
|
|
|
NOTE: C_comp is lower for the ODT-enabled models versus the normal I/O model.
|
|
The C_comp value is set to match the input state of the DQ I/O as measured from
|
|
the HSPICE model. Due to the C_comp differences between the DQ model and the
|
|
DQ_ODT* models, the output characteristics of the models will look different
|
|
when simulated. So, to match most closely with the HSPICE model, simulate with
|
|
the DQ_FULL or DQ_HALF model for ALL Output simulations. Use the ODT models
|
|
ONLY for Input simulations.
|
|
|
|
All the speed grades are combined into a single IBIS file
|
|
Use the models labeled with 533 for the DDR2-400/533 speeds and the models
|
|
labeled with 800 for the DDR2-667/800 speeds.
|
|
|
|
u49a.ibs Packaged model for commercial temperatures
|
|
u49a_bd.ibs Bare Die model
|
|
u49a_it.ibs Packaged model for industrial temperatures
|
|
|
|
[Disclaimer] This software code and all associated documentation, comments
|
|
or other information (collectively "Software") is provided
|
|
"AS IS" without warranty of any kind. MICRON TECHNOLOGY, INC.
|
|
("MTI") EXPRESSLY DISCLAIMS ALL WARRANTIES EXPRESS OR IMPLIED,
|
|
INCLUDING BUT NOT LIMITED TO, NONINFRINGEMENT OF THIRD PARTY
|
|
RIGHTS, AND ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS
|
|
FOR ANY PARTICULAR PURPOSE. MTI DOES NOT WARRANT THAT THE
|
|
SOFTWARE WILL MEET YOUR REQUIREMENTS, OR THAT THE OPERATION OF
|
|
THE SOFTWARE WILL BE UNINTERRUPTED OR ERROR-FREE. FURTHERMORE,
|
|
MTI DOES NOT MAKE ANY REPRESENTATIONS REGARDING THE USE OR THE
|
|
RESULTS OF THE USE OF THE SOFTWARE IN TERMS OF ITS CORRECTNESS,
|
|
ACCURACY, RELIABILITY, OR OTHERWISE. THE ENTIRE RISK ARISING OUT
|
|
OF USE OR PERFORMANCE OF THE SOFTWARE REMAINS WITH YOU. IN NO
|
|
EVENT SHALL MTI, ITS AFFILIATED COMPANIES OR THEIR SUPPLIERS BE
|
|
LIABLE FOR ANY DIRECT, INDIRECT, CONSEQUENTIAL, INCIDENTAL, OR
|
|
SPECIAL DAMAGES (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS
|
|
OF PROFITS, BUSINESS INTERRUPTION, OR LOSS OF INFORMATION)
|
|
ARISING OUT OF YOUR USE OF OR INABILITY TO USE THE SOFTWARE,
|
|
EVEN IF MTI HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
|
|
Because some jurisdictions prohibit the exclusion or limitation
|
|
of liability for consequential or incidental damages, the above
|
|
limitation may not apply to you.
|
|
|
|
Copyright 2006 Micron Technology, Inc. All rights reserved.
|