The VR300 is a Test RTM, typically used during firmware and software development and debugging cycles on the The VF360. The rear panel contains two mini-USB connectors, a Dual mini-SAS (SFF-8088) connector and a SFP case.

The SFP cage provides a 1Gbps Ethernet connection to the DSP. Copper and optical SFP transceiver modules are supported.

The FPGA mini-USB connector provides an USB-Blaster interface to the FPGA for SignalTap® II and other JTAG based functionality.

The DSP mini-USB connector provides an XDS100 emulator interface to the DSP for in-circuit emulation (ICE) and serial port functionality.

The eight full-duplex High-Speed Serial Interface (HSSI) lanes on the Dual mini-SAS connects to the FPGA on the X8d[1:4] and X12d[1:4] OpenVPX signals. Typical protocols on the mini-SAS is PCIe, XAUI, SRIO, SerialLite II and others.