Datasheet

SYNCH BREAK FIELD SYNCH FIELD

ID FIELD

Sync Break Sync Field ID Field 1, 2, 3, ...8 Data Fields

Checksum

Master Header

Slave Response

Message Frame

In-frame space

Master or Slave

LIN

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The Master Mode of LIN module is compatible with LIN 2.1 standard.

28.3.1.2 Message Frame

The LIN protocol defines a message frame format, illustrated in Figure 28-12. Each frame includes one

master header, one response, one in-frame response space, and inter-byte spaces. In-frame-response

and inter-byte spaces may be 0.

Figure 28-12. LIN Protocol Message Frame Format: Master Header and Slave Response

There is no arbitration in the definition of the LIN protocol; therefore, multiple slave nodes responding to a

header might be detected as an error.

The LIN bus is a single channel wired-AND. The bus has a binary level: either dominant for a value of 0,

or recessive for a value of 1.

28.3.1.2.1 Message Header

The header of a message is initiated by a master (see Figure 28-13) and consists of a three field-

sequence:

• The synch break field signaling the beginning of a message

• The synch field conveying bit rate information of the LIN bus

• The ID field denoting the content of a message

Figure 28-13. Header 3 Fields: Synch Break, Synch, and ID

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Serial Communication Interface (SCI)/Local Interconnect Network (LIN) SPNU562–May 2014

Module

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