GE VMIPCI-5565-110000 Reflective Memory Interface

Technical Specifications 

The VMIPCI-5565-110000 Reflective Memory Interface is a PCI-based communication card used for real-time data sharing between multiple independent systems. It supports 128 MB SDRAM memory capacity and provides high-speed reflective memory networking through a fiber-optic interface. The interface supports data transfer rates from 43 MB/s with single longword access to 174 MB/s with 64-byte packet transfers, allowing fast synchronization between connected nodes. It supports up to 256 nodes in a reflective memory network and provides transmission through multimode fiber up to 300 m or single-mode fiber up to 10 km. 

Features

High speed, easy to use fiber-optic network (2.12 Gbaud serially)
PCI 64-bit 66MHz transfers
No host processor involvement in the operation of the network
Redundant Mode of Operation
Up to 256 nodes
Connectivity with multimode fiber up to 300 meters
Dynamic packet size, 4 to 64 bytes of data per packet
Transfer rate 47.1MB/s (4 byte packet) to 174 MB/s (64 byte packet)
64MB or 128MB SDRAM Reflective Memory with parity
Two independent Direct Memory (DMA) channels
Configurable endian conversion for multiple CPU architectures on the same network

Basic Operation

Each node (VMIxxx-5565 Reflective Memory boards) in the network is interconnected using fiber-optic cables in a daisy chain loop. The transmitter of the first board must be tied to the receiver of the second board. The transmitter of the second board is tied to the receiver of the third, and so on, until the loop is completed back at the receiver of the first board. Each node must have a unique node ID, which is accomplished using a bank of eight (8) onboard jumpers. The order of the node IDs is unimportant; they just have to be unique (i.e. no two nodes can have the same node ID).A transfer of data over the network is initiated by a write to onboard SDRAM from the PCI host system. The write can be as simple as a PCI target write, or it can be due to a DMA cycle by one of the two resident DMA engines. When the write to the SDRAM is occurring, circuitry on the VMIPCI-5565 automatically writes the data, along with other pertinent information, into the transmit FIFO. From the transmit FIFO, a transmit circuit retrieves the data and forms it into variable length packets of from 4 to 64 bytes, which pass over the fiber-optic interface to the receiver of the next board. When data is received, a circuit opens the packets and stores the data in the board’s receive FIFO. From the receive FIFO, a third circuit writes the data into local onboard SDRAM at the same relative location in memory as that of the originating node. The third circuit also simultaneously routes the data into the board’s own transmit FIFO. From there, the process is repeated until the data returns to the receiver of the originating node. At the originating node, the data packet is removed from the network. 

FAQ  技术常见问题解答

Q: What memory access method does VMIPCI-5565-110000 provide?
A: It provides local SDRAM access for fast read operations.

Q: How does VMIPCI-5565-110000 share data between nodes?
A: Data written to one node is automatically transferred to all network nodes.

Q: What type of network topology does VMIPCI-5565-110000 support?
A: It supports reflective memory networks using fiber-optic communication.

Q: What redundant transfer rate does VMIPCI-5565-110000 provide?
A: It provides 20 MB/s to 87 MB/s redundant transfer rates.

Q: Are your products brand new?
A: Yes. We only supply 100% original and brand-new products. All items are sourced through authorized channels and have never been used or refurbished.

Q: Why can customers buy with confidence?
A: Because every product is backed by our 1-Year Warranty Guarantee of Quality, ensuring reliability, customer satisfaction, and long-term support after delivery.

Q: Do you provide international shipping?
A: Yes. We ship products to customers worldwide using reliable international logistics services such as EMS, DHL, UPS, and FedEx.

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