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
239
40
Figure 3-5 CN1: Hard Disk (IDE) connector
Pin Signal Pin Signal
1-RESET 2GROUND
3DATA 7 4DATA 8
5DATA 6 6DATA 9
7DATA 5 8DATA 10
9DATA 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