Rohde & Schwarz RTP Series - LIN (Option R&S RTP-K3); The LIN Protocol

Protocol analysis
R&S
®
RTP
582User Manual 1337.9952.02 ─ 12
13.6 LIN (option R&S RTP-K3)
The Local Interconnect Network (LIN) is a simple, low-cost bus system used within
automotive network architectures. LIN is usually a subnetwork of a CAN bus. The pri-
mary purpose of LIN is the integration of uncritical sensors and actuators with low-
bandwidth requirements. Common applications in a motor vehicle are the control of
doors, windows, wing mirrors, and wipers.
13.6.1 The LIN protocol
This chapter provides an overview of protocol characteristics, frame format, identifiers
and trigger possibilities. For detailed information, order the LIN specification on http://
www.lin-subbus.org/ (free of charge).
LIN characteristics
Main characteristics of LIN are:
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Single-wire serial communications protocol, based on the UART byte-word inter-
face
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Single primary, multiple secondaries - usually up to 12 nodes
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Primary-controlled communication: primary coordinates communication with the
LIN schedule and sends identifier to the secondaries
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Synchronization mechanism for clock recovery by secondary nodes without crystal
or ceramics resonator
The R&S RTP supports several versions of the LIN standard: v1.3, v2.0, v2.1 and the
American SAE J2602.
Data transfer
Basic communication concept of LIN:
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Communication in an active LIN network is always initiated by the primary.
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The primary sends a message header including the synchronization break, the
synchronization byte, and the message identifier.
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The identified node sends the message response: one to eight data bytes and one
checksum byte.
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Header and response form the message frame.
LIN (option R&S RTP-K3)