CoaXPress-over-Fiber Bridge IP Core

CoaXPress-over-Fiber Bridge IP Core for FPGA

At a glance
  • Available as CXP to XGMII (device) or XGMII to CXP (host) Bridge IP Cores
  • Compatible with Xilinx 7 Series (and newer), Intel Cyclone/Arria 10 and Microchip PolarFire devices
  • Compatible with S2I and third-party CoaXPress IP Cores
  • Delivered with a working reference design (when purchased with the CoaXPress IP Core)



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A Sensor to Image product
A Sensor to Image product


What are the benefits of using CoaXPress-over-Fiber for my application?

  • Ultra-high data/frame rates
  • Many accessory and cabling options to cover any length requirement
  • Low CPU overhead, low latency, low jitter image acquisition
  • Highest camera count per PC performance
  • Very competitive cost/performance ratio
  • Wide industry acceptance due to JIIA and IEEE standardization


CoaXPress-over-Fiber Bridge IP Core Description
CoaXPress-over-Fiber Bridge IP Core Description

The CoaXPress-over-Fiber Bridge IP Core allows to connect a CoaXPress IP Core to an XGMII (10 Gbps Media Independent Interface) bus inside an FPGA. XGMII, as defined in IEEE Std 802.3 Clause 46, is the main access to the 10G Ethernet physical layer. The generic nature of this interface facilitates mapping the CoaXPress signaling into the PCS/PMA Ethernet sublayers.

S2I's CoaXPress-over-Fiber Bridge IP Core is available as a device or host version. In a camera (device), it converts CoaXPress packets to XGMII packets going towards an Ethernet PCS/PMA block. In a frame grabber (host), it converts XGMII packets to CoaXPress packets.


What is the status of the CoaXPress-over-Fiber standard?

As of February 2021
Started in 2018, the development of CoaXPress-over-Fiber by Euresys and Sensor to Image has received in February 2021 the final approval and incorporation into the standard by the CoaXPress Workgroup.
Euresys had anticipated this approval and readily offers CoaXPress-over-Fiber Bridge IP Cores as well as a Four-connection CoaXPress-over-Fiber frame grabber (QSFP+) for evaluation and integration to camera manufacturers / integrators.
The CoaXPress Workgroup includes most major vision machine manufacturers working under the leadership of the Japan Industrial Imaging Association (JIIA).


What is CoaXPress-over-Fiber?
What is CoaXPress-over-Fiber?

CoaXPress-over-Fiber is a light but significant extension of the existing CoaXPress specification to support transport over fiber optics.

CoaXPress (CXP) is the de-facto standard for high-bandwidth computer vision applications. CoaXPress 2.0, the latest version of the specification, specifies the CXP-12 speed, a 12.5 Gbps (Gigabit per second) link over a coaxial copper cable. As link aggregation is common with CoaXPress, bandwidths of 50 Gbps (12.5 x 4) are easily achievable with four CXP-12 links. The CoaXPress specification is hosted by the JIIA (Japan Industrial Imaging Association).

CoaXPress-over-Fiber has been designed as an add-on to the CoaXPress 2.0 specification. It provides a way to run the CoaXPress protocol, as it is, unmodified, over a standard Ethernet connection, including fiber optics. As such, CoaXPress-over-Fiber uses standard electronics, connectors and cables designed for Ethernet, but the protocol is CoaXPress, not Ethernet, not GigE Vision.

Read more about CoaXPress-over-Fiber on our technology page.