User`s guide

Understanding the IBIS Model
i.MX53 System Development User’s Guide, Rev. 1
3-2 Freescale Semiconductor
3.2 Header Information
The first section of an IBIS file provides the basic information about the file and its data. Table 3-1 explains
the header information notation. Example 3-1 shows what header information looks like in an IBIS file.
Example 3-1. Header Information
[IBIS Ver] 4.0
[Comment Char] |_char
[File Name] imx53_19x19_to2_ver03.ibs
[File Rev] 03
[Date] Wed Nov 24 13:15:11 IST 2010
[Source]
[Notes] This model passed check w/t IBISCHK5 V5.0.3 utility.
No errors were reported.
8 warnings were reported: 4 of them relate to MIN DC
endpoints, 2 relate to MIN/MAX VI curves, 2 relate to
single model defined / model data reuse.
All these warnings can be waived.
3.3 Component and Pin Information
The second section of an IBIS file is where the data book information regarding the component’s pinout,
pin-to-buffer mapping, and the package and pin electrical parameters is placed. Table 3-2 explains the
component and pin information notation, and Example 3-2 shows what it looks like in an IBIS file.
Table 3-1. Header Information
Keyword Required Description
[IBIS Ver] Yes Version of IBIS Specification this file uses.
[Comment char] No Change the comment character. Defaults to the pipe (|) character
[File Name] Yes Name of this file. All file names must be lower case. The file name extension for an IBIS file is .ibs
[File Rev] Yes The revision level of this file. The specification contains guidelines for assigning revision levels.
[Date] No Date this file was created
[Source] No The source of the data in this file. Is it from a data book? Simulation data? Measurement?
[Notes] No Component or file-specific notes.
[Disclaimer] No May be legally required
[Copyright] No The file’s copyright notice
Table 3-2. Component and Pin Information
Keyword Required Comment
[Component] Yes The name of the component being modeled. Standard practice has been to use the industry
standard part designation. Note that IBIS files may contain multiple [Component]
descriptions.