Vmebus is a computer bus standard, originally developed for the motorola 68000 line of cpus. Vmeaio16 vmebus board with 16 analog inputs and 4 outputs. Power supply switchable by software scbus wired to vmebus backplane p2. All vme backplane boards are constructed from fr4 epoxy glass material and are assembled and tested. Its use of the eurocard format, its high performance, and its versatility are some of the reasons that it appeals to a wide range of users. Technical manual cc121 arcnet interface for vmebus version 2. What if i need more than 21 slots in a backplane i. In many ways the vmebus is the pins of the 68000 run out onto a backplane. Jul 15, 2015 this is a subdivision of the interface bus listing. The vmebus specification has since been refined through revisions b, c, c. Backplane vme j1, backplane vme j2, 3u vme backplanes, vme j1 backplanes, vme j2 backplane, vmebus. A more detailed timeline of vmebus history can be found at the vita website. This is done with a flexible bus arbitration scheme that allows up to 21 masters in each system. Vme iser8 intelligent vmebus intelligent vmebus boardboard.
Instead of nanoseconds and risetimes and access widths, system programmers want to know how and why to assign memory space, how to use specialpurpose vme io boards without conflicting with onboard devices, and how to recognize software errors caused by hardware configuration problems. In august of 1982, revision b of the vmebus specification was published by the. We will work with you individually to find the perfect set up for your application. In august of 1982, revision b of the vmebus specification was published by the newly formed vmebus manufacturers group now vita. Backplane architecture and design bert simonovichs design. A wide range of technical and commercial aspects have contributed to the unique success of the vmebus concept. Dynamic address sizing is made possible because of a six bit address modifier code am0am5 which accompanies each address. Setting jumpers is not necessary for the sbs technologies autodaisychain vmebus backplane order number. Omnivme also supports 2esst signaling, which means it transfers data on both edges of each vmebus clock pulse. However, one of the key features of the 68000 is a flat 32bit memory model, free of memory segmentation and other antifeatures. Vme64x the elma electronic vme64x backplane series is designed to fully comply with the ansivita vme extension standard. Vme bus description, pinout and vme standards information. The interrupt level is also selected with jumpers, and the interrupt vector is software programmable. Backplane solutions guide this guide provides an overview of key backplane criteria that will enable you to manage and reduce your program risk.
Powered vxs crates vxs vmebus switched serial is the new ansi vita 41 standard which combines the 32bit parallel vmebus with high speed switched serial interconnect fabrics. Sep 23, 2003 during the last few years, the vita 41 committee of the vmebus standards organization has been defining a switched serial backplane fabric for vmebus called vxs. All elma electronic vme backplanes are designed to maximize performance, minimize noise, and to give the customer the most reliable, costeffective product possible. To the vmebus, the scanner is a memorymapped slave that responds to 8bit or 16bit accesses in either a16 or a24 address space. Vme bus description the vme bus is a scalable backplane bus interface. This can be thought of as a tag that is attached to each address. An 8x improvement in achievable performance from the vme64 backplane to 2esst is now possible without. American national standard for board level live insertion for vmebus secretariat vmebus international trade association approved january 12, 1996 american national standards institute, inc. Vmeh22501 in 2esst and conventional vme backplane applications. Encyclopedia article about software backplane by the free dictionary. Vmebus technology is wellestablished for industrial applications and automation technology with highsecurity standards, infinite processor performance requirements, and realtime capability.
Monolithic vmebus 21 slot backplane this unit came from a working environment but has not been tested and is being sold asis. Backplane vmevme64 the 6u monolithic wiener j1j2 backplane fully complies with ansivita 11994 and ieee10141987 specifications. Abstract this document recommends practices to implement board level live insertion with existing vmebus boards. In the following drawing, the cpu board acts as a bus. Vmebus module on the opposite side of the backplane via the user defined pins of. It elaborates what for many days has not been explained. Software backplane article about software backplane by. Vector offers wide range of vme backplanes from 3 to 21 slots wide in j1 and j2 are 3u backplanes. It includes all necessary components on a vmebus 6u board and needs one slot. Vmebus specification manual third printing introduction. If the sbc module configuration switch 3 is set to open does not reset the sbc module in response to a vmebus reset signal, the vmebus adapter software will receive a vmebus reset interrupt upon detection of a bus reset. Omnivme provides an interface between a vme bus or vme320 backplane and a local oncard pci bus.
The modular form factor, high bandwidth, and commercial success of the vmebus made it particularly attractive as an instrumentation platform. Multiplexing of the address and data lines expands the original 32bit bus to give a significant increase in the data bandwidth available. Ive been thinking about the same thing a backplanebased 6502 system, but i have so little practical experience with these things ive been kind of floundering. Switched serial gigabit fabric for vmebus ee times. Vmebus is physically based on the eurocard sizes, mechanicals and connectors, but uses its own signalling system, which eurocard does not define. Transition modules do not connect to vmebus but just to the. Backplane solutions guide atrenne integrated solutions. Versatile backplane bus 1987 original vme standard. These backplanes are produced using the latest in backplane design and manufacturing technology to insure the highest level of performance and quality in the industry. Vmebus, vme64x and vxs backplanes open standards 3u vme j1 backplane, 3u vme j2 backplane, 6u vme monolithic j1j2 backplane, 3u vme64x j1 backplane, 6u vme64x backplane, 7u vme64x backplane, 9u vme64x backplane with p47, 6u vme64x backplane vita 31. I agree that the backplane is the key component in any system architecture and the sooner you consider the backplanes physical architecture near the beginning of a project, the more successful the project will be. It is designed as a 10layer board in stripline technology.
All vmebus boards plug into the vmebus backplane, all of which is housed in a chassis or. Monolithic vmebus 21 slot backplane bmi surplus, inc. The vmebus reset signal initializes the vmebus adapter vic64 to its powerup state. Software backplane article about software backplane by the. Jan 14, 2011 the information about backplane architecture is something to smile about. Ibm 360s just didnt connect to vaxes very well, and the software wasnt very. A bus which operates over a backplane is used to communicate between two or more ccas via an interconnecting pcb a backplane or motherboard. System controller board a board which resides in slot 1 of a vmebus backplane and has a system clock driver, an arbiter.
The vmebus specification allows full peertopeer multiprocessor capabilities. A central bus arbiter, which is located in the first slot in the backplane and is part of the vmebus system controller, determines which master may use the bus. Functions available include analog io, serial io, and high speed parallel io. It is intended to be used by system engineers, project engineers, architects, design engineers, and engineering managers. During the last few years, the vita 41 committee of the vmebus standards organization has been defining a switched serial backplane fabric for vmebus called vxs. Vector offers comprehensive range of vmebus backplanes from 2 to 21 slots. Omnivme supports 16, 32, and 64bit vme bus transfers and can act as a master or slave with fullslot, onesystemcontrol functionality. This new revision refined the electrical specifications for the signal line drivers and receivers, and also brought the mechanical specifications more in line with the developing iec 60297 standard, the formal specifications for eurocard mechanical formats. Capabilities backplanes production 4 elma offers an extensive line of backplanes and accessories to meet the requirements of the embedded systems market.
Craig mackenna of mostek and cecil kaplinsky of signetics developed the first draft of the vmebus specification. The vmebus64x specification is the latest in a long line of enhancements to the original, and highly successful, vmebus specification which dates back to the early 1980s. Sn74vmeh22501 vmebus transceiver features and benefits. Daisy chain by default, schroff vmebus backplanes with more than 2 slots are equipped with electric automatic daisy chain. Embedded backplane buses list, back plane bus descriptions. The operation ensues via the vmebus or via a serial terminal. Im so glad to have found your pages about the zolatron project.
The vmeaio16 comes with a local mc 68340 cpu at 25 mhz for the execution of complex data acquisition algorithms. Buses designed to operate over backplanes or mother boards are listed here. They are open collector signals, and were added to the 160 pin p1j1 connector in the vme64x specification. Vmebus backplanes schroff backplanes online catalog. Iack daisychain driver a functional module which activates the interrupt. Vme backplanes per vmebus specifications 2 to 21 slots. You can use more than one scanner in your vme system to create large and flexible io subsystems. Vmebus connector pin assignment and signal descriptions under vme64x terminated signals highlighted in yellow page 5 ga0 ga4 the geographical address ga0ga4 is a binary code that indicates the slot number of the backplane. The vme backplanes are specially designed to achieve excellent power distribution, best signal integrity and virtually zero cross talk, the smd components used on the vme64x backplanes lead to a much lower failure rate. The scanner can act as a vme interrupter on any of the seven vmebus interrupt lines.
The cc121 occupies 4kbytes in the vmebus standard, or short io address space. Sn74vmeh22501 universal bus transceiver for the vmebus. Commissioning of a new digital bpm system for the psi proton. Please read additional advisories within the manual. Index 01 march 01, 2002 the products described in this manual are in compliance with all applied ce standards. General standards corporation is a leading supplier of data acquisition io boards, provides a complete family of data acquisition cards for sonar, industrial, and embedded applications on several form factorsbusses, and for many operating systems.
Vmeaio16 is an intelligent vmebus board, containing 6 or 16 analog differential inputs and is ideally suited for fast and flexible data acquisition. Vme j1j2 and vme64x j1j2p0 backplanes per ansivita 1. A01 a15, a01 a23, a01 a31, or a01 a40 d00 d07, d00 d15, d00 d23, d00 d31, or d00 d63 undefined before rev. The tables below detail the required control signals to produce the different bus widths. Monolithic 6u high vme64 and vme64x backplanes are fully rohs compliant and perform to ansivita 1. Boxes, enclosures, racks backplanes are in stock at digikey. It was first developed in 1981, and continues to see widespread use today. American national standard for board level live insertion for. Cross sectional view of board, connector, backplane, and front. Vme cards may be produced which respond to the following address widths or data widths. Sbs technologies vp7 hardware user manual pdf download. A board with system controller functionality must be fitted at slot 1 for sbs technologies products, see additional notes within the manual. All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only.
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