XVME-653/658 Manual
5-2
Connectors
This section describes the pinouts for each of the five connectors on the XVME-973/1.
P1 Connector
The P1 connector connects up to two 3.5" hard drives. Power for the drives is
not
sup-
plied by the XVME-973/1.
Table 5-1 XVME-973/1 P1 Connector Pinout
Pin
Signal
Pin
Signal
1
HDRESET*
21
HDRQ
2
GND
22
GND
3
HD7
23
DIOW*
4
HD8
24
GND
5
HD6
25
DIOR*
6
HD9
26
GND
7
HD5
27
IORDY
8
HD10
28
ALE
9
HD4
29
HDACK*
10
HD11
30
GND
11
HD3
31
IRQ14
12
HD12
32
IOCS16*
13
HD2
33
DA1
14
HD13
34
NC
15
HD1
35
DA0
16
HD14
36
DA2
17
HD0
37
CS1P*
18
HD15
38
CS3P*
19
GND
39
IDEATP*
20
KEY (NC)
40
GND
Caution
The IDE controller supports enhanced PIO modes, which reduce the cy-
cle times for 16-bit data transfers to the hard drive. Check with your
drive manual to see if the drive you are using supports these modes. The
higher the PIO mode, the shorter the cycle time. As the IDE cable length
increases, this reduced cycle time can lead to erratic operation. As a re-
sult, it is in your best interest to keep the IDE cable as short as possible.
The PIO modes are selected in the BIOS setup (see p. 3-4). The Auto-
config will attempt to classify the connected drive if the drive supports
the auto ID command. If you experience problems, change the
Transfer
Mode:
to
Standard
.
Caution
The total cable length must not exceed 18 inches. Also, if two drives are
connected, they must be no more than six inches apart.
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