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Spectrum Digital, Inc
The signals on the “B” side of the connector are shown in the table below.
Table 11: P4, PCI Connector, “B” Side
Pin
1
3
5
7
9
11
Signal
-12 Volts
GND
+5 Volts
INTB-
PRSNT1-
PRSNT2-
I/O
O
O
Description
Not Used
Ground
+5 Volt Power
Interrupt OUT
Power Requirement
Power Requirement
Pin
2
4
6
8
10
12
Signal
TCK
TDO
+5 Volts
INTD-
Rsvd.2
Key.5
I/O
I
I
I
Description
Not Used
Tied to TDO
+5 Volt Power
Interrupt Out
Key
13
Key.6
Key
14
Rsvd.3
15
17
GND
GND
Ground
Ground
16
18
CLK
REQ-
System Clock
19
+V I/O
Not Used
20
AD31
I/O/Z
Address/Data 31
21
AD29
I/O/Z
Address/Data 29
22
GND
Ground
23
25
27
29
31
33
35
37
39
41
43
45
47
49
51
53
55
57
59
61
AD27
+3.3 Volts
AD23
AD21
+3.3 Volts
C/BE2-
IRDY-
DEVSEL-
LOCK-
+3.3 Volts
+3.3 Volts
AD14
AD12
M66EN
Key.8
AD7
AD5
GND
+V I/O
+5 Volts
I/O/Z
I/O/Z
I/O/Z
I/O/Z
I
I/O/Z
I
I/O/Z
I/O/Z
O
I/O/Z
I/O/Z
Address/Data 27
Not Used
Address/Data 23
Address/Data 21
Not Used
Command/Byte Enable 2
Initiator Ready
Device Select
Resource Locked
Not Used
Not Used
Address/Data 14
Address/Data 12
66 Mhz Enable
Key
Address/Data 7
Address/Data 5
Ground
Not Used
+5 Volt Power
24
26
28
30
32
34
36
38
40
42
44
46
48
50
52
54
56
58
60
62
AD25
C/BE3
GND
AD19
AD17
GND
+3.3 Volts
GND
PERR-
SERR-
C/BE1-
GND
AD10
Key.7
AD8
+3.3 Volts
AD3
AD1
ACK64-
+5 Volts
I/O/Z
I/O/Z
I/O/Z
I/O/Z
I/O/Z
O
I/O/Z
I/O/Z
I/O/Z
I/O/Z
I/O/Z
Address/Data 25
Command/Byte Enable 3
Ground
Address/Data 19
Address/Data 17
Ground
Not Used
Ground
Parity Error
System Error
Command/Byte Enable 1
Ground
Address/Data 10
Key
Address/Data 8
Not Used
Address/Data 3
Address/Data 1
Not Used
+5 Volt Power
3-12
DM6437 EVM Technical Reference
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