FC401 USB SMI/SPI Adapter

incl. 10x colored fly-wires, USB cable (USB 2.0 Type-A to Micro-B, black, 2 m) and green sub-shell


excl. VAT
plus shipping costs

In Stock

SKU: FC401 Category:


The FC401 USB SMI/SPI Adapter represents a hardware module connecting MS-Windows and Linux based host PCs with evaluation boards as well as custom boards featuring Ethernet PHY transceivers or switches with SMI and/or SPI interface.

The FC401 USB SMI/SPI Adapter provides an USB 2.0 interface and a SMI as well as SPI port. The USB interface is used for connectivity to a MS-Windows or Linux host PC. The SMI and SPI ports are used to realize a connection to evaluation and custom boards.

On the host PC the FC401 USB SMI/SPI Adapter is detected as Ethernet device. Flexible software APIs provide seamless access to Ethernet PHY transceiver internal registers via SMI and SPI interface.




  • High-Speed USB 2.0 device interface
  • USB 2.0 Micro-AB connector
  • SMI and SPI connectivity via standard 2,54 mm 18-pin header
  • NXP LPC4333 32-bit ARM Cortex-M4/M0 microcontroller
  • USB powered
  • Compact and modular design
  • Incl. USB cable and colored fly-wires



  • MS-Windows 10 and several Linux distributions are supported
  • Common C-API and Python 3.x wrapper
  • Software API to access Ethernet PHY transceivers and switches internal registers
  • Python GUI to read and write register values via SMI and SPI
  • Python and C++ sample applications



The USB interface of the FC401 USB SMI/SPI Adapter allows seamless connection to a broad variety of PCs, notebooks and embedded platforms. The USB control access via Broadway2-API enables the usage of USB hosts running MS-Windows as well as Linux operating systems.

The standard 18-pin header in combination with colored fly-wires enables connectivity to SMI and SPI ports of evaluation and custom boards to access Ethernet PHY transceivers and switches.

The FC401 USB SMI/SPI Adapter can be used for the following use cases:

  • Seamless access to evaluation boards and custom boards via SMI and SPI interface
  • Access to Ethernet PHY transceivers and switches via SMI and SPI interface
  • Configuration and verification of Ethernet PHYs and switches
  • Setup and control test-modes, loopback-modes etc. of Ethernet PHY transceivers and switches
  • Verification of custom designed PHY and switch boards using FC401 in combination with FC6xx as link-partners



  • MS-Windows 10 or Linux host platform (e.g. PC, Laptop, Raspberry Pi)
  • USB 2.0 host port

Technical Data

Dimensions: 52 x 27 x 11 mm
Power Supply: 5 V (USB powered)
Operating Temperature: 0°C to +85°C
USB Connector: USB 2.0 Micro-AB Receptacle

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