Altera SerialLite II Protocol Manuel d'utilisateur télécharger pdf (Page 11)

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SerialLite II Protocol Reference Manual

SerialLite II Specification

Physical Layer

The Physical layer defines 8B/10B symbols for converting 8-bit user data

characters from the Data Link layer to 10-bit data symbols, as well as

control symbols and idle symbols for inter-packet fill. The Physical layer

also specifies the bit transmission order, and serial-to-parallel and

parallel-to-serial conversion. Figure 2–3 shows an example of the

Physical layer connection.

Figure 2–3. Physical Layer Definition

Transmit Direction

■ Serialization of data

■ 8B/10B encoding

■ Link initialization

■ Insertion of clock compensation characters for asynchronous

applications

■ Idle character conversion

■ Payload and idle scrambling

Receive Direction

■ Clock recovery

■ Deserialization of data

■ Character alignment using a comma control symbol

■ 8B/10B decoding

■ Link initialization

■ Lane alignment (for multiple lanes)

■ Check for running disparity error and invalid character error

■ Clock tolerance compensation for asynchronous applications

■ Payload and idle descrambling

PHY PHY

LinkPort

Lane

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Altera SerialLite II Protocol Manuel d'utilisateur Page 11