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AN4101 Datasheet(PDF) 6 Page - STMicroelectronics |
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AN4101 Datasheet(HTML) 6 Page - STMicroelectronics |
6 / 21 page Introduction to the LIN bus AN4101 6/21 Doc ID 23127 Rev 1 2.3 LIN frame LIN is based on the standard UART format, with 1 start bit, 8 data bits (LSB first), and 1 stop bit. Figure 1. LIN frame The LIN frame is composed of a header and a response. The header consists of: ● the Break field ● the Synch field ● the Protected Identifier field The response consists of: ● from 1 to 8 bytes of data ● 1 checksum byte Figure 2. LIN frame header and response The header is always sent by the master node. The response is sent by only one node: either the master node, or one of the slave nodes. The node sending a frame response is called the publisher. There is always only one publisher for each frame. A node interested in a frame response is called a subscriber. There can be several subscribers for a frame. MSv31513V1 Byte field Start bit LSB (bit 0) MSB (bit 7) Stop bit MSv31514V1 Frame Header Response Response space Break field Sync field Protected identifier field Inter-byte space Inter-byte spaces Data 1 Data 2 Data N Checksum |
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