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The VMIVME-5565 is the VMEbus-based member of VMIC’s family of Reflective Memory, real-time fiber-optic network products. The VMIVME-5565 is a standardized VMEbus 6U Eurocard form factor board. The VMIVME-5565, along with the other members of this family (VMIPMC-5565 and VMIPCI-5565), can be integrated into a network using standard fiber-optic cables. Each board in the network is referred to as a node. Reflective Memory allows computers, workstations, PLCs and other embedded controllers with different architectures and dissimilar operating systems to share data in real-time. The VMIxxx-5565 family of Reflective Memory is fast, flexible and easy to operate. Data is transferred by writing to memory (SDRAM), which appears to reside globally in all boards on the network. On-board circuitry automatically performs the transfer to all other nodes with little or no involvement of any host processor or system. A block diagram of the VMIVME-5565 is shown in Figure 1 on page 15. Features • High-speed, easy-to-use fiber-optic network (2.12 Gbaud serially) • Standard 6U Eurocard form factor • No host processor involvement in the operation of the network • Up to 256 nodes • Connectivity with multimode fiber up to 300 m, single-mode fiber up to 10 km • Dynamic packet size, 4 to 64 bytes of data per packet • Transfer rate 43 Mbytes/sec (4 byte packet) to 174 Mbyte/sec (64 byte packet) • Up to 128 Mbyte SDRAM Reflective Memory with parity • VMEbus DMA support • Four general purpose network interrupts with 32 bits of data each • Error detection