Altera SerialLite II Protocol - Manual (Page 7)

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SerialLite II Protocol Reference Manual
About This Manual
Character: General term used to describe a byte after conversion to its
10-bit encoded value. This term only appears in the context of the
Physical layer.
Code Group: Refers to specific 10-bit values in the context of defining how
to encode and decode. Uses /Dx.y/ and /Kx.y/ notation.
Column: The collection of all lanes during a particular character cycle.
While column is the common term used, it is somewhat confusing in this
specification because all figures show time progressing up/down. Thus
columns are actually seen as rows.
CRC: Cyclic redundancy check. A number derived from, and transmitted
with, a block of data in order to detect data corruption.
Data Packets: One of two possible user packet types transferred through
the user side interface. (The second type is the priority packet.)
Field: A defined portion of a sequence of symbols or ordered sets. Any
particular sequence is defined as a series of fields, each having a specific
purpose.
Lane: A set of differential pairs, one pair for transmission and one pair for
reception.
Lane Alignment: The process of deskewing multiple lanes in a link. Special
characters are used to identify the relationship to other lanes that are
skewed during transmission. Alignment is achieved when all lanes have
the alignment character adjacent to each other.
Lane Bonding: Data payload mapping across multiple lanes which take
place at the transmitter side.
Lane Stripping: The receiver process by which all packet encapsulations
are removed, reversing the transmitter bonding process.
Link: A communications path between two components. An xN link is
composed of N lanes.
Link Management Packets: Used by the SerialLite II protocol to maintain
the link.
Ordered Set: A symbol that is transmitted simultaneously on all lanes at
once; notated with double-vertical lines, as in
||COM||.
Port: A group of transmitters and receivers located on the same chip that
define a link.