57.7.9 LON Mode

The LON mode provides connectivity to the local operating network (LON).

The LON standard covers all seven layers of the OSI (Open Systems Interconnect) reference model from the physical interfaces such as wired, power line, RF, and IP to the application layer and all layers in between.

The LON mode enables the transmission and reception of Physical Protocol Data Unit (PPDU) frames with minimum intervention from the microprocessor.

The USART configured in LON mode is a full-layer 2 implementation including standard timings handling, framing (transmit and receive PPDU frames), backlog estimation and other features. At the frame encoding/decoding level, differential Manchester encoding is used (also known as CDP). When configured in LON mode, there is no embedded digital line filter, thus the optimal usage is node-to-node communication.