VME P1
Connector - 96 pin DIN (41612, Type C) 3 rows x 32 pins [Pitch
2.54mm (.100")] @ IEEE 1014-1987
VMEbus is a computer architecture. The term ‘VME’ stands for VERSAmodule Eurocard and was first coined in 1980 by the group of manufacturers who defined it. This group was composed of people from Motorola, Mostek and Signetics corporations who were cooperating to define the standard. The term ‘bus’ is a generic term describing a computer data path, hence the name VMEbus. Actually, the origin of the term ‘VME’ has never been formally defined. Other widely used definitions are VERSAbus-E, VERSAmodule Europe and VERSAmodule European. However, the term ‘Eurocard’ tends to fit better, as VMEbus was originally a combination of the VERSAbus electrical standard, and the Eurocard mechanical form factor. VERSAbus was first defined by Motorola Corporation in 1979 for its 68000 microprocessor.
| Pin # | Signal Name | Signal Name | Signal Name |
|---|---|---|---|
| Row A | Row B | Row C | |
| 1 | D00 | BBSY* | D08 |
| 2 | D01 | BCLR* | D09 |
| 3 | D02 | ACFAIL* | D10 |
| 4 | D03 | BG0IN* | D11 |
| 5 | D04 | BG0OUT* | D12 |
| 6 | D05 | BG1IN* | D13 |
| 7 | D06 | BG1OUT* | D14 |
| 8 | D07 | BG2IN* | D15 |
| 9 | GND | BG2OUT* | GND |
| 10 | SYSCLK | BG3IN* | SYSFAIL* |
| 11 | GND | BG3OUT* | BERR* |
| 12 | DS1* | BRO* | SYSRESET* |
| 13 | DS0* | BR1* | LWORD* |
| 14 | WRITE* | BR2* | AM5 |
| 15 | GND | BR3* | A23 |
| 16 | DTACK* | AM0 | A22 |
| 17 | GND | AM1 | A21 |
| 18 | AS* | AM2 | A20 |
| 19 | GND | AM3 | A19 |
| 20 | IACK* | GND | A18 |
| 21 | IACKIN* | SERCLK | A17 |
| 22 | IACKOUT* | SERDAT* | A16 |
| 23 | AM4 | GND | A15 |
| 24 | A07 | IRQ7* | A14 |
| 25 | A06 | IRQ6* | A13 |
| 26 | A05 | IRQ5* | A12 |
| 27 | A04 | IRQ4* | A11 |
| 28 | A03 | IRQ3* | A10 |
| 29 | A02 | IRQ2* | A09 |
| 30 | A01 | IRQ1* | A08 |
| 31 | -12v | +5v Standby | +12v |
| 32 | +5v | +5v | +5v |
Notes
- (*) Active Low
- The VMEbus signal types are listed below:
- Open collector signals which require Open Collector drivers and receivers: ACFail, BBSY, BERR, DTACK, IACK, SERDAT, SYSFAIL, SYSRESET, [IRQ1 - IRQ7], and [BR0 - BR3].
- Three-State signals which require 3-State drivers and receivers: AS, DS0, DS1, DTACK, RETRY, IACK, LWORD, WRITE, [AM0 - AM5], [A01 - A31], and [D00 - D31].
- Totem-Pole signals which require Totem-Pole drivers and receivers: BCLR, SYSCLK, SERCLK, IACKIN, IACKOUT, [BG0IN - BG3IN], [BG0OUT - BG3OUT].