atmega32c1 ATMEL Corporation, atmega32c1 Datasheet - Page 202

• Manufacturer Part Number: atmega32c1
• Description: Atmega32m1 Automotive 8-bit Avr Microcontroller With 32k/64k Bytes In-system Programmable Flash
• Manufacturer: ATMEL Corporation

17. LIN / UART - Local Interconnect Network Controller or UART
17.1
17.2
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LIN Features
UART Features
ATmega32/64/M1/C1
The LIN (Local Interconnect Network) is a serial communications protocol which efficiently sup-
ports the control of mechatronics nodes in distributed automotive applications. The main
properties of the LIN bus are:
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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).
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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 20 Kbit/s.
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 Signaling
Hardware Frame Time-out Detection
“Break-in-data” Support Capability
Automatic Re-synchronization to Ensure Proper Frame Integrity
Fully Flexible Extended Frames Support Capabilities
Full Duplex Operation (Independent Serial Receive and Transmit Processes)
Asynchronous Operation
High Resolution Baud Rate Generator
Hardware Support of 8 Data Bits, Odd/Even/No Parity Bit, 1 Stop Bit Frames
Data Over-Run and Framing Error Detection
7647A–AVR–02/08