VME / Eurocard

VME / Eurocard

VME32 and VME64

ANSI/VITA 1 is the original VMEbus specification and establishes a framework for 8-, 16-, 32, and 64-bit parallel-bus computer architectures that can implement single and multiprocessor systems. The mechanical specifications of boards, backplanes, subracks, and enclosures are based on IEC 297 and IEEE 1101.1 specifications, also known as the Eurocard form factor. The current version now supports 64-bit data boosting bandwidth to 80MB/sec, with a new backward-compatible 5-row backplane connector for data and I/O.


ANSI/VITA 1.1 is an extension of the ANSI/VITA 1-1994, VME64 Standard. It defines a set of features that can be added to VME32 and VME64 boards, backplanes and subracks. These features include a 160 pin connector, a P0 connector, geographical addressing, voltages pins for 3.3V, a test and maintenance bus, and EMI, ESD, and front panel keying per IEEE 1101.10.


European standard format for PCBs, which can be plugged together into a standardized subrack. The subrack consists of a series of slotted card guides on the top and bottom, into which the cards are slid so they stand on end, like books on a shelf. At the “back” of each card is one or more connectors, which plug into mating connectors on a backplane which closes the rear of the subrack.