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Zonal Architecture - NCV7410

Zonal Architecture is emerging to address the rapid changes in the automotive industry, especially with the rise of EVs. Significant advancements are seen in low voltage power distribution and vehicle networking. Decentralized zonal power distribution simplifies the wiring harness, reducing weight, manufacturing complexity and costs.

The shift towards software-defined vehicles (SDVs) pushes car makers to innovate, integrating protected semiconductor switches in zonal controllers. eFuses and SmartFETs improve functional safety and fail-functional situations by safeguarding loads, sensors, and actuators. Unlike traditional domain architecture, zonal architecture centralizes control and computing, moving software from individual ECUs to a powerful central computer. This allows higher flexibility for downstream control and power distribution.

Automotive Ethernet is essential for SDVs, handling the vast data from sensors like cameras and LiDAR. It ensures real-time data transfer between zonal controllers and the central computer, which processes sensor data and makes decisions. This infrastructure is crucial for the future of autonomous vehicles, where computing demands will continue to grow.

multi−drop Ethernet. It provides all physical layer functions needed to transmit and receive data over a single unshielded twisted pair. NCV7410 communicates to host MCUs via Open Alliance MACPHY SPI protocol.

Features

Enhanced Noise Immunity Mode:

ENI extends the noise immunity to values well above the IEEE T1S standard
Allows the NCV7410 to withstand worst-case DPI and BCI immunity tests
Significantly improves the network reach when enabled, almost 2X better than competition
Unique to NCV7410

Lowest Line Pin Capacitance:

Best-in-class line pin capacitance allows for the highest number of nodes per segment.
The NCV7410 supports up to 40 nodes on a 25-meter segment, well above the IEEE minimum standard
Lowers cabling, connector, and installation costs

Collision Detection Masking:

Masking detected collisions allows operation in noisy conditions
Prevents false collision detection in high-noise environments
When used in conjunction with ENI, the NCV7410 has unparalleled noise tolerance

Enhanced Noise Immunity Mode:

ENI extends the noise immunity to values well above the IEEE T1S standard
Allows the NCV7410 to withstand worst-case DPI and BCI immunity tests
Significantly improves the network reach when enabled, almost 2X better than competition

PLCA Precedence Mode:

Lower PLCA ID's get precedence over higher ones
Provides arbitration similar to CAN: The Coordinator (i.e., the head node) sends a new beacon once any station transmits
Unique to NCV7410

Physical Layer collision avoidance PLCA:

Allows higher throughput in multi-drop topologies

Two Configurable Digital Outputs that can Drive Low Current LEDs:

Supports systems where up to two LEDs can provide status indicators
Open Alliance Compatible SPI Interface:
Conforms to Open Alliance TC6 specs for Configuration and Data Frames to Host MCUs

Supports IEEE802.3 CSMA/CD Collision Detection:

PLCA mode will default to CSMA/CD collision detection, if needed

MAC Address Filtering:

By filtering frames based on the destination address, Ethernet frames not intended for a certain node are not processed by the host, thus reducing the load
The MAC will see the frame, process the address, drop it based on the filter criteria, and the host will not need to handle it