Altera SerialLite II Protocol Uživatelský manuál stáhnout pdf (Strana 25)

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SerialLite II Protocol Reference Manual

SerialLite II Specification

Continuation of Data Packet Sequence {CDP}

The continuation of data packet sequence consists of two symbols as

shown in Table 2–11. The first symbol is the /CDP/ control symbol. The

second symbol is a data code-group that can be used to convey a channel

number for channel multiplexing. The channel number represent the

packet segment to be continued.

Continuation of Priority Packet Sequence {CPP}

The continuation of priority packet sequence consists of two symbols as

shown in Table 2–12. The first symbol is the /CPP/ control symbol. The

second symbol is a data code-group that is divided into two sections. The

upper nibble contains a segment identification number and is used for

retry-on-error (see“Retry-on-Error (Optional)” on page 2–64). The lower

nibble can be used to convey a channel number for channel. The channel

number represents the packet segment to be continued.

Ordered Sequences

The SerialLite II protocol defines a number of sequences as ordered sets.

As such, each element of the sequence is a symbol that appears on all

lanes simultaneously in a column.

f See “Link Initialization and Training” on page 2–27 for more information

on link training.

Table 2–11. {CDP} Composition

Field Symbol Description

CDP1 /CDP/ Continuation of Data Packet Symbol

CDP2 /DAT/ Channel Number

Table 2–12. {CPP} Composition

Field Symbol Description

CPP1 /CPP/ Continuation of priority packet symbol

CPP2 /DAT/ Segment identification/channel number

1 2 ... 20 21 22 23 24 25 26 27 28 29 30 ... 83 84

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Altera SerialLite II Protocol Uživatelský manuál Strana 25