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V3718

New

VME to USB 2.0/Optical Link Bridge

Features

  • USB 2.0 and CONET (CAEN Daisy Chainable Optical Link Protocol) interfaces
  • Compliant to A3818 and A4818 cards for optical link control
  • Up to 8 VME crates controlled by 1 CONET link
  • From 30 MB/s via USB to 80 MB/s data transfer rate via CONET2
  • VME Master (arbiter or requester)
  • Cycles: RW, RMW, BLT, MBLT, IACK, ADO, ADOH
  • Addressing: A16, A24, A32, CR/CSR, LCK
  • Data width: D8, D16, D32, D64
  • System Controller capabilities
  • Interrupt handler
  • Transparent interrupt propagation from VME to PCIe
  • Front-panel DataWay Display (remotely readable from PC)
  • Front-panel LEMO TTL/NIM fully programmable I/Os (4 outputs and 2 inputs)
  • Libraries, Demos and Software tools for Windows® and Linux

Overview

The V3718 is the new VME to USB 2.0/Optical Link Bridge that fully replaces the V1718 (VME-USB) and V2718 (VME- CONET) models. The Bridge Implements a VME master controlled by a PC via USB 2.0 and Optical Link (CAEN CONET protocol) including all the functions of its two predecessors in a unique device. The mechanics is 1-unit wide VME 6U.

The optical link connection between the V3718 and the host PC requires the A4818 USB3-to-CONET Bridge and an optical fiber cable (AI2700 – Optical Fiber Series). The V3718 is also compatible with CAEN A3818 PCI Express CONET Controller. Multi-crate sessions can be easily performed thanks to the CONET Daisy chain capability: up to eight V3718 units controlled by a single A3818/A4818 building a CONET Optical Network. The USB data transfer over the USB 2.0 compliant interface takes place through the High-Speed Bulk Transaction protocol.

The V3718 can perform all the cycles foreseen by the VME64 standard except those intended for 3U boards. The Bridge can operate as VME System Controller (normally when plugged in the slot 1) acting as a Bus Arbiter in Multi-Master systems. The activity on the VME bus can be monitored in detail both locally (through an 88-LED DataWay Display) and remotely.

The front panel of the V3718 hosts 6 TTL/NIM programmable I/Os on LEMO connectors: four outputs (default assignment is: DSn, AS, DTK, BERR) and two inputs. The I/Os can be programmed via USB and Optical Link to implement functions like Timer, Counter, Pulse generator, I/O register, and others.

The supported data transfer rate is up to 30 MB/s by USB 2.0 and up to 80 MB/s by CONET2. Thanks to the 128KB memory buffer, the activity on the VME bus is not slowed down by the transfer rate on the USB port, or on the CONET one, especially when several V3718 units share the same network.

The V3718 can be integrated into the most common Windows® and Linux® computers by CAEN dedicated drivers. Middleware libraries and useful example demos are also provided. Firmware can be upgraded via USB/Optical link.

Technical Specifications

PHYSICAL
Form Factor 

1-unit wide VME 6U 

Weight 

315 g

PC INTERFACE
USB 

USB 2.0 

Type-B socket 

Optical Link 

CONET (CAEN protocol) 

FSP+ connector 

TRANSFER RATE
  • up to 80 MB/s with CONET2
  • up to 30 MB/s with USB 2.0
ADDRESSING

A16, A24, A32, CR/CSR, LCK; ADO, ADOH cycles

INTERRUPT CYCLES

D08, D16, D32, IACK cycles

INTERRUPTS TRANSFER AND MONITOR
Optical Link 

VME interrupts IRQ[7:1] passed directly from VME to the PCIe bus via optical link; 

host system is notified asynchronously (polling not required) 

USB 

VME interrupts are not directly passed to the PC; host system has to poll IRQ[7:1] via USB 

LED DISPLAY

Data bus, address bus, address modifier, interrupt request, control signals

PANEL I/Os
OUT[0:3] 

4 signal outputs 

Single-ended NIM/TTL (Zin = 50 Ω) 

LEMO 00 female socket 

Software programmable 

Default functions: 

  • OUT 0 = DSn 
  • OUT 1 = AS 
  • OUT 2 = DTACK 
  • OUT 3 = BERR 
IN[0:1] 

2 signal inputs 

Single-ended NIM/TTL (Zin = 50 Ω) 

LEMO 00 female socket 

Software programmable 

SOFTWARE
  • Windows® and Linux® support
  • Drivers for the communication links (USB 2.0, CONET)
  • Middleware libraries C/C++
  • Example demos and firmware upgrade tool
POWER REQUIREMENTS

n.a.

Ordering Options

Code Description
WV3718XAAAAA V3718 - VME-USB Bridge   RoHS
WV4718XAAAAA V4718 - VME64-USB 3.0, Ethernet and Optical Link Bridge  RoHS
WVX3718XAAAA VX3718 - VME-USB Bridge   RoHS
WVX4718XAAAA VX4718 - VME64-USB 3.0, Ethernet and Optical Link Bridge  RoHS

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