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100Base-T1 USB Interface


The 100BASE-T1 USB Interface (Media Converter) connects a 100BASE-T1 network to any computer with an USB port. The converter acts as an Ethernet network interface card when plugged into an USB port. The interface easily connects Automotive Ethernet devices with OPEN Alliance BroadR-Reach (OABR) port, such as cameras or ECUs, directly to any PC without a need of an on-board network card.

The interface establishes a point-to-point link between an unshielded twisted-pair IEEE 100BASE-T1 (IEEE 802.3bw) port and USB-LAN port, and works as a Network Interface Card allowing the user to configure the network adapter’s parameters, such as IP address and mask. The converter features a DSUB9 (BroadR-Reach, CAN bus) and Micro-USB connector. The OABR channel’s Master/Slave configuration is selected by a switch button or programmatically.

100BASE-T1 USB Interface offers a possibility to access SMI registers of the 100BASE-T1 transceiver  (PHY) via a CAN bus or a USB’s virtual serial port. This enables the user to evaluate signal strength, detect polarity of the T1 port, carry out a BroadR-Reach media test to diagnose cable errors, fine-tune the PHYs parameters, and generally to read and write the registers.

  • 100BASE-T1 (IEEE 802.3bw) to USB-LAN Interface
  • Acts as USB 2.0 Network Adapter Card
  • Master / Slave configuration by on-board dip switches or programmatically
  • USB powered
  • 4 Status LEDs
  • DSUB9 connector for T1, RJ-45 connector for Ethernet
  • Automatic polarity detection for OABR Slave
  • Media test for T1 cable – can detect a shortage, cut-off and impedance mismatch
  • Table top or DIN-rail mount
  • Configuration and diagnostics over USB COM port (CDC) and CAN bus
Property Value
The information herein is subject to change without notice.
Communication and Peripherals
Channels 2 CAN-HS (ISO 11898-2) with CAN FD support (ISO 11898-1:2015; CAN 2.0A/B, ISO CAN FD)
1 LIN bus (supports both master and slave; ISO 17987; LIN 2.2a)
1 RS-232
1 Virtual COM port (USB 2.0 CDC)
Inputs 2 Analogue/digital inputs (0-5 V)
Outputs 4 Digital outputs (PWM capable)
DO1: HSD (5 V, max. 0.5 A)
DO2, DO3: push-pull (5 V, max. 0.5 A)
DO4: LSD (max. 40 V, 1.5 A)
Programming Free-of-charge IDE and GNU C/C++ compiler (STM32CubeIDE)
Programming examples available
Firmware update over USB, CAN, RS-232, or ICSP (ST-LINK)
Debugging ST-LINK SWD (a programming header needed)
Non-volatile memory Internal 16 Kbit EEPROM
External microSD card slot (a card is not part of delivery)
LEDs 3 Dual-color LED
1 Power LED
Power External 7 – 30 V DC with polarity protection over DSUB connector
USB-powered over Micro-USB (not for LIN bus)
Consumption 100 mA @ 12 V (approx. 1 W)
Note: When no digital output (DO1-DO4) is being driven.
MCU STM32G483 (Arm® 32-bit Cortex®-M4) with DSP and FPU;
170 MHz, 512 KB Flash, 128 KB SRAM
Transceivers CAN-FD: MCP2562FD
Connectors 1 D-SUB9M
1 MicroSD slot
1 Micro-USB
Buttons and switches 2 DIP switches
1 Tactile switch
Dimensions (L x W x H) 108 x 54 x 30 mm
Weight 85 g
Operating temperature -20 to 70 °C
Protection IP20
Placement Table (adhesive pads included)
DIN-rail mount (clip sold separately)
Data Sheet
100Base-T1 USB Interface Data Sheet