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BIRD ID#:	 151
ISSUE TITLE:     IBIS-AMI Modified Reserved Parameters for Jitter/Noise 
AUTHOR: 	 Walter Katz, SiSoft; Bob Ross, Teraspeed Consulting Group
DATE SUBMITTED:  February 17, 2012
DATE REVISED:    
DATE ACCEPTED BY IBIS OPEN FORUM: March 9, 2012

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STATEMENT OF THE ISSUE:

Allow additional Formats List, Increment and Steps for Reserved Parameters 
Rx_Receiver_Sensitivity and Tx_DCD.

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On Page 146, change

|               Tx_DCD (Transmit Duty Cycle Distortion) can be of Usage Info 
|               and Out. It can be of Type Float and UI and can have Data 
|               Format of Value, Range and Corner. It tells the EDA platform 
|               the maximum percentage deviation of the duration of a 
|               transmitted pulse from the nominal pulse width. Example of 
|               TX_DCD declaration is:

to

|               Tx_DCD (Transmit Duty Cycle Distortion) can be of Usage Info 
|               and Out. It can be of Type Float and UI and can have Data 
|*              Format of Value, Range, Corner, List, Increment and Steps. 
|*              It tells the EDA platform 
|               the maximum percentage deviation of the duration of a 
|               transmitted pulse from the nominal pulse width. Example of 
|               TX_DCD declaration is:

On Page 147, change

|               Rx_Receiver_Sensitivity can be of Usage Info and Out and of
|               Type Float and of Data Format Value, Range and Corner.
|               Rx_Receiver_Sensitivity tells the EDA platform the voltage
|               needed at the receiver data decision point to ensure proper
|               sampling of the equalized signal.  In this example, 100 mV
|               (above +100 mV or below -100 mV) is needed to ensure the
|               signal is sampled correctly.  Examples of Rx_Clock_PDF
|               declarations are:

to

|               Rx_Receiver_Sensitivity can be of Usage Info and Out and of
|*              Type Float and of Data Format Value, Range, Corner,
|*              List, Increment and Steps.
|               Rx_Receiver_Sensitivity tells the EDA platform the voltage
|               needed at the receiver data decision point to ensure proper
|               sampling of the equalized signal.  In this example, 100 mV
|               (above +100 mV or below -100 mV) is needed to ensure the
|               signal is sampled correctly.  Examples of Rx_Clock_PDF
|               declarations are:




On Page 149, change

|                           +---------------------------------------+
|                           |              Data Format              |
| ===================================================================
| | Reserved Parameter      | V | R | C | L | I | S | G | D | D | T |
| |                         | a | a | o | i | n | t | a | u | j | a |
| |                         | l | n | r | s | c | e | u | a | R | b |
| |                         | u | g | n | t | r | p | s | l | j | l |
| |                         | e | e | e |   |   | s |   | D |   | e |
| |                         |   |   | r |   |   |   |   | i |   |   |
| |                         |   |   |   |   |   |   |   | r |   |   |
| |                         |   |   |   |   |   |   |   | a |   |   |
| |                         |   |   |   |   |   |   |   | c |   |   |
| +-------------------------+---+---+---+---+---+---+---+---+---+---+
| | Init_Returns_Impulse    | X                                     |
| | GetWave_Exists          | X                                     |
| | Use_Init_Output         | X                                     |
| | Ignore_Bits             | X                                     |
| | Max_Init_Aggressors     | X                                     |
| | Tx_Jitter               |                         X   X   X   X |
| | Tx_DCD                  | X   X   X                             |
| | Rx_Receiver_Sensitivity | X   X   X                             |
| | Rx_Clock_PDF            |                         X   X   X   X |
| +-------------------------+---------------------------------------+
|

to

|                           +---------------------------------------+
|                           |              Data Format              |
| ===================================================================
| | Reserved Parameter      | V | R | C | L | I | S | G | D | D | T |
| |                         | a | a | o | i | n | t | a | u | j | a |
| |                         | l | n | r | s | c | e | u | a | R | b |
| |                         | u | g | n | t | r | p | s | l | j | l |
| |                         | e | e | e |   |   | s |   | D |   | e |
| |                         |   |   | r |   |   |   |   | i |   |   |
| |                         |   |   |   |   |   |   |   | r |   |   |
| |                         |   |   |   |   |   |   |   | a |   |   |
| |                         |   |   |   |   |   |   |   | c |   |   |
| +-------------------------+---+---+---+---+---+---+---+---+---+---+
| | Init_Returns_Impulse    | X                                     |
| | GetWave_Exists          | X                                     |
| | Use_Init_Output         | X                                     |
| | Ignore_Bits             | X                                     |
| | Max_Init_Aggressors     | X                                     |
| | Tx_Jitter               |                         X   X   X   X |
|*| Tx_DCD                  | X   X   X   X   X   X                 |
|*| Rx_Receiver_Sensitivity | X   X   X   X   X   X                 |
| | Rx_Clock_PDF            |                         X   X   X   X |
| +-------------------------+---------------------------------------+
|


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ANALYSIS PATH/DATA THAT LED TO SPECIFICATION

In anticipation of approving BIRD 123.2, this BIRD adds Formats List, 
Increment and Steps for Reserved Parameters Rx_Receiver_Sensitivity and 
Tx_DCD.

Changes are shown by |* lines


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ANY OTHER BACKGROUND INFORMATION:

The original IBIS Version 5.0 text in Section 6C is used as the baseline
for describing the changes.  BIRD138 and possibly other BIRDs propose changes
to the table and possibly to the reserved parameter descriptions and rules.

This BIRD adds the three new Format options to the existing TX_DCD and
Rx_Receiver_Sensitivity parameters after the other revisions are made.  This
is to minimize changes to exsiting parameters when BIRD123.2 is considered
for a future release.

BIRD approved March 9, 2012 by the IBIS Open Forum, with modification to 
the column alignment in the Data Format table for clarity.

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