SparkFun’s New MicroMod Single Pair Ethernet Kit: Built for 10BASE-T1L Experimentation

4 March, 2024

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Sparkfun has recently introduced a MicroMod Single Pair Ethernet Kit featuring the Analog Devices ADIN1110 transceiver which is capable of handling 10BASE-T1L communications.

10BASE-T1L is an Ethernet standard that enables long-range communication over a single twisted pair of wires, supporting speeds up to 10 Mbps and distances up to 1 kilometer, primarily used in industrial and building automation.

SparkFun made things easier by designing the board to be compatible with their MicroMod ecosystem. MicroMod is a modular interface ecosystem for quick embedded development and prototyping. This unique combination will allow for testing connections between industrial devices over long distances, up to 1,700 meters.

The main feature of this board is the Analog Devices ADIN1110 transceiver which enables 10BASE-T1L Ethernet by using a single twisted pair for lightweight, long-distance data transmission at 10Mbps by the 802.3cg IEEE standard, all without delivering power over the cable.

The MicroMod Single Pair Ethernet Kit is a combination of SparkFun MicroMod Single Pair Ethernet Function Board – ADIN1110 and SparkFun MicroMod Main Board the features of those two are listed below

SparkFun MicroMod Single Pair Ethernet Kit Specification:

SparkFun MicroMod Single Pair Ethernet Function Board
- Ethernet Communication
  - 10BASE-T1L IEEE Standard 802.3cg-2019 compliant transceiver.
  - Single-Pair Ethernet transmission at speeds up to 10Mbps.
  - 1km transmission distance (1.7km max cable reach).
  - Supply Voltage of 1.8V or 3.3V (Function Board operates the ADIN1110 at 3.3V).
  - 2.4V transmission amplitude.
  - Integrated MAC connects via SPI, supporting 16 MAC addresses.
  - Supports both Generic and OPEN Alliance SPI protocols.
SparkFun MicroMod Main Board:
- Power Supply and Protection:
  - Accepts an Input Voltage Range of 5V via USB-C or ~3.7V to 4.2V via LiPo Battery
  - Equipped with a Built-in Resettable PTC Fuse (5V/2A)
  - Features AP7361C(3.3V/1A) and AP7347DQ (3.3V/500mA for Qwiic devices) Voltage Regulators
  - Includes an Integrated MCP73831 Single Cell LiPo Charge Circuit (500mA)
- Connectivity and Ports:
  - Offers 1x USB Type-C Connector and 1x 2-Pin JST Connector for LiPo Battery
  - Provides M.2 Connectors for one MicroMod Processor Board and one Function Board
  - Includes 2x Qwiic Enabled I2C connectors and 1x MicroSD Card Socket
  - Features 1x SWD 2×5 Header for programming/debugging and a Built-in MUX for UART1
- User Interface:
  - Contains Buttons for Reset and Boot operations
  - Equipped with LEDs indicating VIN, 3.3V, Qwiic 3.3V, and Charging status (CHG)
- Physical Attributes and Additional Features:
  - Board Dimensions are 3.40″ x 2.90″
  - Includes Plated Through Holes and Jumpers for GND, SEL, TXO, RXI, RST, 5V (MEAS), VBAT, 3.3V (MEAS), and more

The kit offers essential documentation for easy setup and use, including hookup guides for the Ethernet Function and MicroMod Main Boards, ADIN1110 and T1 Jack datasheets, an Arduino library, hardware design files on GitHub, and comprehensive MicroMod documentation and forums for support. There is also a getting started guide for the board.

The MicroMod Main Board is designed with an M.2 connector which lets the swapping modules easily. The Single Pair Ethernet board connects to the main board, enabling programming via the onboard USB-C port, which also powers the entire setup. Additional features include Reset/boot buttons, SWD pinouts, a 2A fuse, dual voltage regulators, PTH jumpers, a LiPo battery connector with charging IC, status LEDs, a microSD slot, and Qwiic connectors for I2C expansion, among other peripherals on the board.

The Kit includes two SparkFun MicroMod Single Pair Ethernet Function boards featuring ADIN1110, two MicroMod Main boards, and a 0.5m shielded Ethernet cable. Sold on SparkFun for $89.95.

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