Datasheet

21. LIN / UART - Local Interconnect Network Controller or UART
21.1. Features
21.1.1. LIN
• Hardware implementation of LIN 2.1 (LIN 1.3 Compatibility)
• Small, CPU efficient and independent Master/Slave routines based on “LIN Work Flow Concept” of LIN
2.1 specification
• Automatic LIN header handling and filtering of irrelevant LIN frames
• Automatic LIN response handling
• Extended LIN error detection and signalling
• Hardware frame time-out detection
• “Break-in-data” support capability
• Automatic re-synchronization to ensure proper frame integrity
• Fully flexible extended frames support capabilities
21.1.2. UART
• Full duplex operation (independent serial receive and transmit processes)
• Asynchronous operation
• High resolution baud rate generator
• Hardware support of eight data bits, odd/even/no parity bit, and one stop bit frames
• Data over-run and framing error detection
21.2. Overview
The LIN (Local Interconnect Network) is a serial communications protocol which efficiently supports the
control of mechatronics nodes in distributed automotive applications. The main properties of the LIN bus
are:
• Single master with multiple slaves concept
• Low cost silicon implementation based on common UART/SCI interface
• Self synchronization in slave node
• Deterministic signal transmission with signal propagation time computable in advance
• Low cost single-wire implementation
• Speed up to 20Kbit/s
LIN provides a cost efficient bus communication where the bandwidth and versatility of CAN are not
required. The specification of the line driver/receiver needs to match the ISO9141 NRZ-standard.
If LIN is not required, the controller alternatively can be programmed as Universal Asynchronous serial
Receiver and Transmitter (UART).
Atmel ATmega16M1/32M1/64M1 [DATASHEET]
Atmel-8209F-ATmega16M1/32M1/64M1_Datasheet_Complete-10/2016
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