The TJA1101 automotive-to-industrial Ethernet pass-through solution is an adapter board between automotive Ethernet and industrial Ethernet. It uses the TJA1101 automotive Ethernet PHY, compliant with the IEEE 100BASE-T1 standard, connected back-to-back with an industrial Ethernet PHY for transparent data transfer, converting between 100BASE-T1 and 100BASE-TX. This allows a PC to connect directly to an automotive Ethernet network, making it well suited to the development of in-vehicle infotainment systems, communication applications and similar use cases.
Key Points
- 12V DC input, with no need to distinguish between positive and negative polarity
- Conversion between 100BASE-T1 and 100BASE-TX, bridging industrial Ethernet and automotive Ethernet signals
- Supports 100 Mbit/s transmission, reaching more than 15 m over unshielded twisted pair
- Simple chip configuration; the automotive Ethernet PHY can be set as master or slave via jumpers
Solution Overview
Powered from the 12V automotive low-voltage supply, the TJA1101 automotive Ethernet transceiver and the industrial Ethernet transceiver are connected back-to-back to achieve transparent network data transfer.
Core Components
- Automotive Ethernet: TJA1101 (NXP)
- DC-DC: MPS, full part number available on request
Applications
Primary applications: in-vehicle infotainment system development, automotive Ethernet communication debugging
Extended applications: dash cams
Reference Design TJA1101 Demo
- Power input with no need to distinguish between positive and negative polarity
- Conversion between automotive Ethernet and industrial Ethernet
- Dedicated SMI interface provided for convenient debugging
- Complete hardware design reference materials
- Complete software debugging reference materials
Functional Block Diagram
