AR-B1474 User
¡¦
s Guide
3-3
3.2.2 Hard Disk (IDE) Connector (CN1)
A 40-pin header type connector (CN1) is provided to interface with up to two embedded hard disk drives (IDE AT
bus). This interface, through a 40-pin cable, allows the user to connect up to two drives in a “daisy chain” fashion.
To enable or disable the hard disk controller, please use BIOS Setup program to select. The following table
illustrates the pin assignments of the hard disk drive’ s 40-pin connector.
1
2
39
40
Figure 3-5 CN1: Hard Disk (IDE) connector
Pin
Signal
Pin
Signal
1
-RESET
2
GROUND
3
DATA 7
4
DATA 8
5
DATA 6
6
DATA 9
7
DATA 5
8
DATA 10
9
DATA 4
10
DATA 11
11
DATA 3
12
DATA 12
13
DATA 2
14
DATA 13
15
DATA 1
16
DATA 14
17
DATA 0
18
DATA 15
19
GROUND
20
Not used
21
Not Used
22
GROUND
23
-IOW
24
GROUND
25
-IOR
26
GROUND
27
Not Used
28
BALE
29
Not Used
30
GROUND
31
IRQ14
32
-IOCS16
33
SA 1
34
Not used
35
SA 0
36
SA 2
37
-CS 0
38
-CS 1
39
HD LED A
40
GROUND
Table 3-1 HDD Pin Assignment
3.2.3 Power Connector (J5)
J5 is 8-pin power connector. Using the J5, you can connect the power supply to the on board power connector for
stand alone applications directly.
1 GND
2 +5VDC
3 +5VDC
4 GND
5 GND
6 +12VDC
7 -12VDC
8 -5VDC
J5
Figure 3-6 J5: Power Connector
