user manual

4-18 Computer Group Literature Center Web Site
Connector Pin Assignments
4
VMEbus Connector P1
Two 160-pin connectors (P1 and P2) supply the interface between the base
board and the VMEbus. P1 provides power and VME signals for 24-bit
addressing and 16-bit data. Its pin assignments are set by the VMEbus
specification. They are listed in the following table.
Table 4-9. VMEbus Connector P1
Row Z Row A Row B Row C Row D
1 Not Used VD0 VBBSY
∗ VD8 Not Used 1
2 GND VD1 VBCLR
∗ VD9 GND 2
3 Not Used VD2 VACFAIL
∗ VD10 Not Used 3
4 GND VD3 VBGIN0
∗ VD11 Not Used 4
5 Not Used VD4 VBGOUT0
∗ VD12 Not Used 5
6 GND VD5 VBGIN1
∗ VD13 Not Used 6
7 Not Used VD6 VBGOUT1
∗ VD14 Not Used 7
8 GND VD7 VBGIN2
∗ VD15 Not Used 8
9 Not Used GND VBGOUT2
∗ GND VMEGAP∗ 9
10 GND VSYSCLK VBGIN3
∗ VSYSFAIL∗ VMEGA0∗ 10
11 Not Used GND VBGOUT3
∗ VBERR∗ VMEGA1∗ 11
12 GND VDS1
∗ VBR0∗ VSYSRESET∗ Not Used 12
13 Not Used VDS0
∗ VBR1∗ VLWORD VMEGA2∗ 13
14 GND VWRITE
∗ VBR2∗ VAM5 Not Used 14
15 Not Used GND VBR3
∗ VA23 VMEGA3∗ 15
16 GND VDTACK
∗ VAM0 VA 22 No t U sed 16
17 Not Used GND VAM1 VA21 VMEGA4
∗ 17
18 GND VAS
∗ VAM2 VA20 Not Use d 18
19 Not Used GND VAM3 VA19 Not Used 19
20 GND VIACK
∗ GND VA18 Not Used 20
21 Not Used VIACKIN
∗ VSERCLK VA17 Not Used 21
22 GND VIACKOUT
∗ VSERDAT VA16 Not Used 22
23 Not Used VAM4 GND VA15 Not Used 23
24 GND VA7 VIRQ7
∗ VA14 Not Used 24