The P1 connector carries most of the VME bus signals, between the board and backplane.
Of course the signal assignments are the same for both the interface board and the backplane.
The P designation is used to refer to the interface board, while the J designation is used to refer to the backplane.
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: |
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 [best class of connector]
Class 2: 400 mating cycles
Class 3: 50 mating cycles [not recommended for a development chassis]
A listing of companies which produce the DIN connectors used with the VME bus.
Insure the class of connected selected meets the estimated number of mating cycles.
Having the connectors fail while trying to debug a new card design is the last thing that needs to happen.
Design Hint; Don't worry about the specification changing and updating the connector functions.
The Vmebus has gone in a new direction with the VPX standard, which carry new connectors and pin out.
Topic Navigation: Engineering Home > Interface Buses > Embedded Backplane Buses > VMEbus Description > P1/J1 VME64x Signal Assignments.
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Modified 3/05/12
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