InfiniBand Network Architecture

Transmit Logic Functions

General

This section describes the various elements of the Physical Layer's transmit function (see Figure 26-11 on page 702). The transmit function consists of the following elements:

• Data Buffer. Accepts the packet character stream from the Link Layer.

• Multiplexer (Mux). Normally gates the packet data from the Data Buffer to the Byte Striping logic. Under some circumstances, however, the mux gates one of the following special patterns through to the Byte Striping logic:

  - During link training, the mux gates TS1 or TS2 to the Byte Striping logic.

  - At periodic intervals, the mux gates the special Skip Ordered Set pattern through to the Byte Striping logic to facilitate clock tolerance compensation in the receiver circuit ...