Master Process
| The first part of a LIN transaction, which contains the header
and is followed by a response period where it waits for slave
processes.
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Slave Process
| The second part of a LIN transaction, in which data is
transmitted on the bus followed by a checksum. The device that initiates the
master process may also be the one that performs the slave process.
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Header
| The primary section of the master process, which contains the
Break, Delimiter bit, Sync Field, and PID byte.
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Response
| The section of the LIN transaction in which the master process
relinquishes the bus and one or more slave processes transmit data.
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Break
| The start of a transaction, at least 13 dominant bits in a row,
followed by a delimiter.
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Delimiter
| The separation between the break and sync fields consisting of
at least one recessive bit.
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Sync
| The character following the Break and Delimiter bits, consisting
of the value 0x55, which synchronizes the transmission rate between the
master and the slaves.
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PID/Identifier
| The last piece of the header. This contains information about
whether the master expects to send or receive data, how much data is to be
sent/received, and which slave(s) will be communicated with. What each
individual identifier means differs for each LIN network, and these
definitions are outlined in a LIN Description File (LDF). The identifier
also includes two Parity bits.
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VBAT
| Battery voltage of the vehicle. VSUP is derived from
this voltage.
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VSUP
| Primary voltage of the ECU and LIN transceivers. This can differ
from VBAT due to protection circuitry between the battery and the
actual components.
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LDF
| The LIN Description File, an ASCII document that contains
detailed information of a LIN bus, including the nodes on the bus, the
signals, and the frames that will be sent on the bus and their meanings.
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