VME64x Bus P1 Connector Pin Out and Pinout Signal Names

VME64 P1 Connector Pinout and Signal Names

VME64 and VME64x (optional) comes with an enhanced connector. Five rows instead of the old 3 rows used in the original VME specification. The new 160 pin DIN (5 row x 32 pin) adds rows "z" and "d". Primary additions are power (+3.3 volts) and ground (GND) on P1 and 'User Defined' signals on P2; (VME64x P2 Connector Pin Outs). Rows "A", "B", and "C" remain unchanged. The Pin out for P1 is listed above:
The pin-outs shown above are as defined by VME64x. If your using the VME 64 specification all pins in row 'd' becomes "reserved", and every other pin (non-ground; GND) in row 'z' becomes "reserved". Other wise the pin-out is the same between VME64 and VME64x. That would imply rows 'd' and 'z' are not bussed in VME64.

These new 5 row connectors will still accept the original 3 row connectors as a mate. The 2 new rows (z and d) were added as 'compression' pins on the exterior of the 3 row DIN connector.

As of 2001, I still see many 3.3 volt cards (with a 32 x 5 row connector) which rely on +5 volts (from the backplane) and use an on-board regulator to produce the +3.3 voltage. I would guess that this allows the (3.3 volt) card to be used in both a VME32 chassis or VME64 chassis. Seems like a good plan, but watch the +5v dissipation.

There are a number of different connector types used with the VMEbus
P1 and P2 are 96 pin DIN (41612, Type C) 3 rows x 32 pins [Pitch 2.54mm (.100")] @ IEEE 1014-1987; [VME]
P1 and P2 are 160 pin DIN (41612, Type C Expanded) 5 rows x 32 pins [Pitch 2.54mm (.100")] @ ANSI/VITA 1-1994; [VME64]
P1 connectors may also come with an Auto Bus Grant [ABG] option which is an automatic [mechanical] switching capability built-in to auto jumper the slot

P2 Split DIN / RF Coax (DIN 41612 Type M) DIN + Coax @ 78 + 2, 60 + 4, 42 + 6, 24 + 8

The class of connectors determines the number of insertions it's [Mechanical Endurance] designed to handle per DIN 41612.
Class 1: 500 mating cycles
Class 2: 400 mating cycles
Class 3: 50 mating cycles

A listing of companies which produce the DIN connectors used with the VME bus, and a description of the VMEbus may be found on the main VMEbus page.

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Last Modified 10/8/09