164:(ECL) electrical standard, which allows higher speed than TTL and generates less switching noise. Segments implement a 32-bit multiplexed address/data bus, which allows a larger address space than CAMAC. A module may be a master or slave. There may be multiple masters in a segment; masters arbitrate for control of the bus and then perform data transfers to or from slaves. This allows for very fast read-out of an entire segment by doing a chained block read from a master with a general-purpose CPU. Each I/O card will then assume mastership, send its data and then hand off mastership to the next card in a sequence, all without the overhead of the supervising board with the general-purpose CPU.
176:
has +15 V and -15 V pins on the backplane, which are typically fed with very small power supplies as most modules use very little +/- 15 V (or any at all). Special high-capacity power supplies with large 15 V supplies would have to be used if modules drew large amounts of current on those rails. Crates typically have dedicated 200 A or 300 A switched-mode power supplies, providing current to the modules through multiple pins on the backplane connector. A large installation typically has multiple racks, each with three crates. Cooling and air handling are a significant issue, as is the safe design of high-current power distribution.
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194:
logic (ECL), an asynchronous bus protocol, and a sophisticated multi-segment design. At the time, it seemed obvious that the way to get higher speed was a wide parallel bus, since the logic for each bit was already as fast as the electronics allowed. Later developments have moved to high-speed serial protocols such as SATA, leaving designs such as the FASTBUS serial segment as a technological dead end.
22:
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hold 26 modules. Each module may dissipate up to 70 W, giving a total crate heat load of 1750 W. Modules require a −5.2 V supply for the ECL interface, usually a separate −2 V supply for ECL termination, and often a +5 V supply for TTL or CMOS logic. The FASTBUS standard also
193:
FASTBUS was conceived as a replacement for CAMAC in data acquisition systems. Limitations of CAMAC were a slow bus speed, limited bus width, single bus controller and unwieldy inter-crate communications (the CAMAC Branch
Highway). FASTBUS sought improvement in all these areas by using a faster bus
230:
The problems of manufacturing cable segment transmitter chips reliably, together with the cable-handling issues of the wide parallel bus, contributed to the low usage of cable segments. The system interconnect modules were also complex and expensive, again discouraging cable segment use. These
167:
Cable
Segments are implemented using 32-bit-wide parallel twisted-pair cables and a differential signalling scheme. The electrical standard allows regular ECL receiver chips but requires custom transmitter circuits which allow lines to be safely driven both high and low at the same time - this
246:
The system on which the IEEE standard is based (US Department of Energy Report DOE/ER-0189) was developed by the NIM committee of the US Department of Energy. Representatives of the ESONE committee of
European laboratories and of other laboratories in Europe and Canada also contributed to the
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A FASTBUS system consists of one or more segments. Each segment may be a "crate segment" or a "cable segment". Segments are connected together using a segment interconnect (SI). A crate segment typically consists of a backplane with slots to hold up to 26 modules, mounted in a
184:
A FASTBUS crate is quite a bit taller than other types of electronics crates. The power supply for a FASTBUS crate is typically mounted below the crate, rather than being integral for the crate itself, taking up even more vertical rack space.
157:
Small systems may consist of only one crate segment, or a small number of independent crate segments connected directly to a central computer rather than using segment interconnects.
200:
FASTBUS was used in many high-energy physics experiments during the 1980s, principally at laboratories involved in the development of the standard. These include
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problems, together with the late development of inexpensive protocol chips, hindered the expression of the full potential of FASTBUS multi-segment architecture.
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Interfaces are listed by their speed in the (roughly) ascending order, so the interface at the end of each section should be the fastest.
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154:. Modules are physically about 14 inches by 15 inches, and may occupy one or more adjacent slots.
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in smaller-scale systems and by custom designs (which have lower per-channel cost) in large systems.
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standard 960-1986: "IEEE Standard FASTBUS Modular High-Speed Data
Acquisition and Control System"
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150:. Each module is typically a printed circuit board with a front panel, similar to a
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129:(CAMAC) in high-speed, large-scale data acquisition. It is also a
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The IEEE standard was originally approved in May 1984.
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standard commonly used in data acquisition systems in
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46:. Unsourced material may be challenged and removed.
642:Coherent Accelerator Processor Interface (CAPI)
168:feature is required by the arbitration logic.
305:
8:
312:
298:
290:
127:Computer Automated Measurement and Control
262:
260:
223:FASTBUS has now largely been replaced by
125:standard, originally intended to replace
106:Learn how and when to remove this message
256:
7:
44:adding citations to reliable sources
14:
1043:
1042:
20:
31:needs additional citations for
214:Brookhaven National Laboratory
1:
637:Intel Ultra Path Interconnect
615:Intel QuickPath Interconnect
605:Direct Media Interface (DMI)
268:"AN INTRODUCTION TO FASTBUS"
239:FASTBUS is described in the
1083:
600:Compute Express Link (CXL)
1036:
837:IEEE-1284 (parallel port)
752:logical device interface)
131:modular crate electronics
399:List of bus bandwidths
270:. FNAL. Archived from
162:emitter coupled logic
842:IEEE-1394 (FireWire)
580:PCI Extended (PCI-X)
274:on 23 September 2013
180:Physical description
40:improve this article
683:Parallel ATA (PATA)
590:PCI Express (PCIe)
135:particle detectors
1054:
1053:
1040:
767:Apple Desktop Bus
744:PCI Express (via
703:Serial ATA (SATA)
389:Network on a chip
160:FASTBUS uses the
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500:HP Precision Bus
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121:(IEEE 960) is a
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832:IEEE-488 (GPIB)
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630:Infinity Fabric
460:Europe Card Bus
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141:Bus description
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379:Bus contention
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354:Front-side bus
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335:computer buses
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1003:Multidrop bus
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782:Commodore bus
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730:Fibre Channel
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394:Plug and play
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384:Bus mastering
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359:Back-side bus
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57: –
56:
52:
51:Find sources:
45:
41:
35:
34:
29:This article
27:
23:
18:
17:
535:TURBOchannel
489:
325:
278:21 September
276:. Retrieved
272:the original
245:
238:
229:
222:
199:
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183:
170:
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159:
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148:19-inch rack
144:
123:computer bus
118:
117:
102:
93:
83:
76:
69:
62:
50:
38:Please help
33:verification
30:
1008:CoreConnect
987:ExpressCard
915:Thunderbolt
905:Camera Link
688:Bus and Tag
374:Address bus
369:Control bus
364:Daisy chain
861:ACCESS.bus
760:Peripheral
560:InfiniBand
555:HP GSC bus
349:System bus
251:References
247:standard.
171:Full-size
66:newspapers
822:Lightning
772:Atari SIO
647:SpaceWire
480:Zorro III
420:S-100 bus
415:SS-50 bus
408:Standards
328:standards
321:Technical
235:Standards
96:June 2019
55:"FASTBUS"
1061:Category
1048:Category
1023:Wishbone
996:Embedded
975:Portable
895:Profibus
827:DMX512-A
713:Parallel
565:Ethernet
475:Zorro II
425:Multibus
326:de facto
210:Fermilab
152:blade PC
1028:SLIMbus
982:PC Card
966:TOSLINK
656:Storage
610:RapidIO
490:FASTBUS
445:STD Bus
342:General
189:History
119:FASTBUS
80:scholar
961:S/PDIF
852:1-Wire
817:RS-485
812:RS-423
807:RS-422
802:RS-232
663:ST-506
620:NVLink
470:STEbus
430:Unibus
225:VMEbus
218:TRIUMF
216:, and
173:crates
82:
75:
68:
61:
53:
956:McASP
924:Audio
869:SMBus
865:PMBus
847:UNI/O
787:HP-IL
740:SATAe
725:ESCON
698:HIPPI
530:NuBus
485:CAMAC
455:Q-Bus
450:SMBus
435:VAXBI
332:wired
87:JSTOR
73:books
1013:AMBA
951:MADI
936:AES3
797:MIDI
750:NVMe
746:AHCI
708:SCSI
693:DSSI
668:ESDI
545:SBus
505:EISA
440:MBus
330:for
323:and
280:2013
241:IEEE
206:SLAC
202:CERN
59:news
1017:AXI
946:I²S
900:USB
885:D²B
880:SPI
875:I3C
857:I²C
792:HIL
777:DCB
748:or
735:SSA
718:SAS
678:SMD
673:IPI
595:AGP
585:PXI
575:PCI
570:UPA
550:VLB
540:MCA
525:VPX
520:VXS
515:VXI
510:VME
495:LPC
465:ISA
42:by
1063::
867:,
863:,
259:^
220:.
212:,
208:,
204:,
137:.
1019:)
1015:(
871:)
859:(
313:e
306:t
299:v
282:.
109:)
103:(
98:)
94:(
84:·
77:·
70:·
63:·
36:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
