Automotive Semiconductors and Functional Safety
Which correctly describes a feature of the in-vehicle network LIN?
- AA high-speed scheme communicating at up to 10 Mbit/s over two differential signal lines, used for safety-critical control such as braking and steering
- BA scheme communicating at 1 Gbit/s over a single twisted pair, used to transmit camera video and display data
- CA low-speed (up to about 20 kbit/s) and inexpensive scheme connecting one master and multiple slaves on a single signal wire, used for controlling power windows, mirrors and the like
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Answer: C. A low-speed (up to about 20 kbit/s) and inexpensive scheme connecting one master and multiple slaves on a single signal wire, used for controlling power windows, mirrors and the like
LIN (Local Interconnect Network) uses a single signal wire and has slaves transmit in an order determined by the master; it is slow, up to about 20 kbit/s. It can be built with simple communication circuits similar to a UART, and slaves can synchronize without a high-precision oscillator, making it inexpensive. It connects parts that do not need speed, such as power windows, mirrors, seats and switches, as a subnetwork of CAN. The 10 Mbit/s scheme describes FlexRay, and the 1 Gbit/s scheme describes automotive Ethernet.
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