TIDA-020071

TDA4 quad-automotive PHY RGMII reference design

TIDA-020071

Design files

Overview

This reference design interfaces with Jacinto™ 7 processor EVM boards through the RGMII Ethernet Expansion Connector. Four automotive Ethernet connections are added through TI's automotive Ethernet physical layers (PHY). This design shows an implementation with TI's DP83TC818S-Q1 100Mbps and DP83TG721S-Q1 1000Mbps single-pair Ethernet (SPE) PHY. A coupling network is used to couple in 12V to the data line.

Features
  • 100Base-T1 and 1000Base-T1 automotive Ethernet connection through RGMII to Jacinto™ 7 processors
  • Option to provide the same clock to all four Ethernet PHYs option to populate TI's BAW oscillator
  • Automotive qualified filter network for 12V power coupling
  • Board ID EEPROM for identification
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

PDF | HTML
TIDUF94.PDF (683 KB)

Reference design overview and verified performance test data

TIDMDE4.PDF (1138 KB)

Detailed overview of design layout for component placement

TIDMDE3.PDF (173 KB)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDMDE6.ZIP (7214 KB)

Files used for 3D models or 2D drawings of IC components

TIDCGS3.ZIP (5862 KB)

Design file that contains information on physical board layer of design PCB

TIDMDE5.PDF (7433 KB)

PCB layer plot file used for generating PCB design layout

TIDMDE2.PDF (1304 KB)

Detailed schematic diagram for design layout and components

Products

Includes TI products in the design and potential alternatives.

Ethernet PHYs

DP83TC818S-Q1Automotive 100BASE-T1 Ethernet PHY with MACsec, advanced TSN with AVB features, and TC-10

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

TPS74701-Q1Automotive 500-mA, low-VIN (0.8-V), adjustable ultra-low-dropout voltage regulator with power good

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

TPS7B82-Q1Automotive 300-mA, off-battery (40-V), ultra-low-IQ LDO with enable in AEC-Q100 Grade-0 and Grade-1

Data sheet: PDF | HTML
High-side switches

TPS4H160-Q140-V, 160-mΩ, 4-ch automotive smart high-side switch with adjustable current limit

Data sheet: PDF | HTML
Ethernet PHYs

DP83TG721S-Q1Automotive, 1000BASE-T1 Ethernet PHY with TC-10, 802.1AS, Advanced TSN and AVB features

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide 4 × Automotive Ethernet PHY Expansion for 100/1000Base-T1 Reference Design for Jacinto 7 Processors PDF | HTML Oct 13, 2024

Related design resources

Hardware development

EVALUATION BOARD
J721EXCPXEVM Common processor board for Jacinto™ 7 processors J721EXSOMXEVM TDA4VM and DRA829V socketed system on module (SoM)

Software development

SOFTWARE DEVELOPMENT KIT (SDK)
PROCESSOR-SDK-J721E Software development kit for DRA829 and TDA4VM Jacinto™ processors

Support & training

TI E2E™ forums with technical support from TI engineers

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