Signal Naming Conventions

Refer to Figure 26-1 on this page, Figure 26-2 on page 685, and Figure 26-3 on page 685. The specification uses the following documentation convention in signal names:

• “w” in a signal name is replaced by:

  - “p” for the positive rail of a differential pair.

  - “n” for the negative rail of a differential pair.

• “x” in a signal name is replaced by the port number.

  - Can range from 0 to n–1, where n is number of connectors/ports on the board edge or the backplane.

• “s” in the signal name:

  - On a board, “s” is replaced by:

  - “t” for an IO plate connector or

  - “b” for a backplane connection.

  - On a backplane, “s” is replaced by the slot number.

• “I” = input signal and “O” = output signal.