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Appendix C: Connectors
69
PMC connectors
The main board supports a backplane via standard Jn1 and Jn2 PMC connectors.
The PMC site provides power for +3.3V, +5V, +12V and –12V. The PCI interface
uses +3.3V signaling, but is +5V tolerant. This allows VIO to connect to +5V or
+3.3V on the EPC-6315.56. ±12V is not used on the board. However, AC bypass is
provided to these pins.
Jn1 connector
1
2
63
64
Table C-2. Jn1 connector pin definitions
Pin
Signal
Signal
Pin
1
TCK
–12V
2
3
GND
~INTA
4
5
~INTB
~INTC
6
7
~Busmode1
+5V
8
9
~INTD
PCI-Reserved
10
11
GND
+3.3V
12
13
PCICLK
GND
14
15
GND
~GNT0
16
17
~REQ0
+5V
18
19
V(I/O)
AD[31]
20
21
AD[28]
AD[27]
22
23
AD[25]
GND
24
25
GND
~C/BE[3]
26
27
AD[22]
AD[21]
28
29
AD[19]
+5V
30
31
V(I/O)
AD[17]
32
33
~FRAME
GND
34
35
GND
~IRDY
36
37
~DEVSEL
+5V
38
39
GND
~LOCK/NC
40
41
~Sdone/NC
~SBO/NC
42
43
PAR
GND
44
45
V(I/O)
AD[15]
46
47
AD[12]
AD[11]
48
49
AD[09]
+5V
50
51
GND
~C/BE[0]
52
53
AD[06]
AD[05]
54
55
AD[04]
GND
56
57
V(I/O)
AD[03]
58
59
AD[02]
AD[01]
60
61
AD[00]
+5V
62
63
GND
~REQ64/NC
64
Содержание EPS-6315
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