Buffer Issue Resolution Document  (BIRD)
BIRD ID#:       {TBD}
ISSUE TITLE:    Defining Relationships between Type and Format
REQUESTOR:      Ambrish Varma, Cadence Design Systems, Inc.                
DATE SUBMITTED: May 31,2011
DATE REVISED:
DATE ACCEPTED BY IBIS OPEN FORUM:
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STATEMENT OF THE ISSUE:
The relationship between parameter type and their format is unclear in the 
5.0 version of the IBIS spec.
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STATEMENT OF THE RESOLVED SPECIFICATIONS:
On page 141 in Section 6c after the lines:

|               DjRj <minDj> <maxDj> <sigma> 
|                 Convolve Gaussian (sigma) with uniform Modulation PDF 

Add the following text:

|Formats Value, Corner and List can be of any defined Types whereas Formats 
|Range, Increment and Steps can be of Types Float, UI, Integer and Tap only. 
|Formats Gaussian, Dual-Dirac and DjRj can only be of Types Float, UI and Integer. 
|For Format Table, the column entries must be of Type Float, UI, Integer, 
|String or Boolean. Type Tap is illegal. If only one Type is provided, then all 
|Table entries shall be of the specified type.
|Type can also be used to designate the entries for each column in the table. 
|More information is provided in the definition of the Table format. 
|
|The table 4 defines the relationships between the different Format and Data  
|Types for Reserved or Model Specific Parameters.

Add the following text and table after Table 3 in Section 6c.

|
|
|                           +-------------------------------------------------+
|                           |                 Data Type                       |
| =============================================================================
| | Format                  | Float |  UI  | Integer | String | Boolean | Tap |
| +-------------------------+-------+------+---------+--------+---------+-----+
| | Value                   |   X      X        X         X        X       X  |
| | Range                   |   X      X        X                          X  |
| | Corner                  |   X      X        X         X        X       X  |
| | List                    |   X      X        X         X        X       X  |
| | Increment               |   X      X        X                          X  |
| | Steps                   |   X      X        X                          X  |
| | Gaussian                |   X      X        X                             |
| | Dual-Dirac              |   X      X        X                             |
| | DjRj                    |   X      X        X                             |
| | Table                   |   X      X        X         X        X          |
| +-------------------------+-------------------------------------------------+
|
| Table 4: Allowed Data Types for Format Values
|
|


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ANALYSIS PATH/DATA THAT LED TO SPECIFICATION:
The existing IBIS specification lacks clear definition of the relationship 
between AMI parameter types and their format. This BIRD proposes a table with 
all the possible allowed combinations for Reserved as well as Model Specific 
AMI Parameters.
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ANY OTHER BACKGROUND INFORMATION:

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