Xycom XVME-653, Manual

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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.