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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