TIDUEX0A November   2020  – December 2020

 

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1 System Description

Automotive architectures are evolving to meet the demands of the future requiring an ever-increasing amount of data. There are 3 types of gateways in the new vehicle architectures: centralized, domain, and zone. The centralized gateway safely and securely moves data between numerous domains of the vehicle including powertrain, chassis, body, ADAS, and so on. The domain controller consolidates ECUs in the functional domain, safely and securely facilitates data movement between the remaining ECUs within a functional domain and to the centralized gateway. Zonal gateways are similar to domain gateways but are physically located to aggregate IO in a specific area of the vehicle.

This reference design is an easy-to-use, detailed DRA821-based reference design for use as a centralized gateway, domain controller, or zonal controller. The DRA821 is a high performance heterogeneous SoC that integrates legacy automotive connectivity (LIN and CAN) with high speed interfaces such as PCIe, USB, a 4-port Gigabit Ethernet switch, safety and security features. The DRA821’s high integration lowers overall system BOM and enables its use in a wide variety of gateway use cases. More information on peripherals, safety, and security features can be found in the Jacinto™ DRA821 Automotive Processors data sheet.

This reference design is based on a single PMIC (TPS6594x) power architecture with on board OSPI, eMMC, and LPDDR4 memory, as well as debug functionality. The board has hardware connectors that showcase and support a diverse set of communication protocols including five Ethernet ports, 10 CAN-FD ports, four LIN ports, and a PCIE connector. Headers have also been included for easy access to serial protocols such as SPI, UART, GPIOS, and I2C.

This reference design serves as a starting point for OEMs and Tier1 to easily and quickly create a fully functional DRA821 solution in the automotive space. Leveraging this design can substantially decrease development costs and time to market.