Atmel Evaluation Kit AT91SAM9M10-G45-EK AT91SAM9M10-G45-EK Data Sheet

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SAM9M10 [DATASHEET]

6355F–ATARM–12-Mar-13

The LIN Mode provides Master node and Slave node connectivity on a LIN bus.

The LIN (Local Interconnect Network) is a serial communication protocol which efficiently supports the control of
mechatronic nodes in distributed automotive applications.

The main properties of the LIN bus are:

• Single Master/Multiple Slaves concept

• Low cost silicon implementation based on common UART/SCI interface hardware, an equivalent in software, or 

as a pure state machine.

• Self synchronization without quartz or ceramic resonator in the slave nodes

• Deterministic signal transmission

• Low cost single-wire implementation

• Speed up to 20 kbit/s

LIN provides cost efficient bus communication where the bandwidth and versatility of CAN are not required.

The LIN Mode enables processing LIN frames with a minimum of action from the microprocessor.

The USART can act either as a LIN Master node or as a LIN Slave node.

The node configuration is chosen by setting the USART_MODE field in the USART3 Mode register (US_MR):

• LIN Master Node (USART_MODE=0xA)

• LIN Slave Node (USART_MODE=0xB)

In order to avoid unpredicted behavior, any change of the LIN node configuration must be followed by a software
reset of the transmitter and of the receiver (except the initial node configuration after a hardware reset). (See 

)