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IEC 60821:1991

VMEbus - Microprocessor system bus for 1 byte to 4 byte data

General information

Valid from 17.12.1991
ICS Groups
31.080.01 Semiconductor devices in general 35.160 Microprocessor systems 35.200 Interface and interconnection equipment
Directives or regulations
None

Standard history

Status
Date
Type
Name
29.01.1999
Amendment
IEC 60821:1991/AMD1:1999
17.12.1991
Main
IEC 60821:1991
Describes a high-performance backplane bus for use in microprocessor bases systems. This parallel bus supports single- and block-transfer cycles on a 32-bit non-multiplexed address and data highway. Transmission is governed by an asynchronous handshaken protocol. The bus allocation provides for multiprocessor architectures. This bus also supports inter-module interrupts for facilitating quick response to internal and external events. The mechanics of the boards and chassis are based on IEC 60297.

Note: -1.This bus is similar to the VME bus.
2.For the price of this publication, please consult the ISO/IEC price-code list.

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Amendment

IEC 60821:1991/AMD1:1999

Amendment 1 - VMEbus - Microprocessor system bus for 1 byte to 4 byte data
Newest version Valid from 29.01.1999
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Standards designation

EVS Estonian standard
EN European standard (published by an CEN or CENELEC)
EN ISO International standard adopted as an European standard
ISO International Organization for Standardization’s standard
IEC International Electrotechnical Commission’s standard
HD CENELEC’s harmonisation document
   
EVS-EN European standard implemented in Estonia
EVS-EN ISO International standard adopted in Europe and implemented in Estonia
EVS-EN ISO/IEC International standard/International electrotechnical standard adopted in Europe and implemented in Estonia
EVS-IEC International electrotechnical standard implemented in Estonia
EVS-ISO International standard implemented in Estonia
   
A, AMD amedment
+A a full standard plus the amendment
/A only amendment
COR, AC corrigendum
+COR a full standard plus the corrigendum
NA national annex
+NA a full standard plus the national annex
/NA only national annex
TS technical specification
TR technical report
CWA agreement, developed by a CEN or CENELEC
prEVS-EN (etc) draft standard
   
et the standard is in Estonian only
en the standard is in English only
et-en the standard is in Parallel text Estonian-English