Chapter 5 – XVME-973/1 Drive Adapter Module
5-5
P4 Connector
P4 connects up to two 2.5" hard drives. Power for the drives is supplied by the connec-
tor.
Table 5-4 XVME-973/1 P4 Connector Pinout
Pin
Signal
Pin
Signal
1
HDRSTDRV*
23
DIOW*
2
GND
24
GND
3
HD7
25
DIOR*
4
HD8
26
GND
5
HD6
27
IORDY
6
HD9
28
ALE
7
HD5
29
HDACK*
8
HD10
30
GND
9
HD4
31
IRQ14
10
HD11
32
IOCS16*
11
HD3
33
DA1
12
HD12
34
NC
13
HD2
35
DA0
14
HD13
36
DA2
15
HD1
37
CS1P*
16
HD14
38
CS3P*
17
HD0
39
IDEATP*
18
HD15
40
GND
19
GND
41
+5V
20
NC
42
+5V
21
HDRQ
43
GND
22
GND
44
NC
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. If two drives are con-
nected, they must be no more than six inches apart.
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