Page 5 of 6 AR-B1663 Manual
1.25 CPU FAN POWER CONNECTOR (J20)
Pin #
Signal Name
1
Ground
2
+12V
3
Rotation detection
1.26 USB CONNECTOR (J21)
Pin #
Signal Name
1
5
Vcc
2
6
USB-
3
7
USB+
4
8
Ground
1.27 AUDIO CONNECTOR (J22)
Signal
Name
Pin
#
Pin
#
Signal
Name
Line Out R
1
2
Line Out L
Ground
3
4
Ground
Line In R
5
6
Line In R
Ground
7
8
Ground
Mic
9
10
BIAS
Ground
11
12
NC
1.28 IRDA CONNECTOR (J23)
Pin #
Signal Name
1
+5V
2
No connect
3
IrRX
4
Ground
5
IrTX
1.29 EXTERNAL KEYBOARD CONNECTOR (J24)
1.30 PRIMARY AND SECONDARY IDE
CONNECTORS (J25, J26)
n
J25: Primary IDE Connector
Signal
Name
Pin
#
Pin
#
Signal
Name
Reset IDE
1
2
Ground
Host data 7
3
4
Host data 8
Host data 6
5
6
Host data 9
Host data 5
7
8
Host data 10
Host data 4
9
10
Host data 11
Host data 3
11
12
Host data 12
Host data 2
13
14
Host data 13
Host data 1
15
16
Host data 14
Host data 0
17
18
Host data 15
Ground
19
20
Protect pin
DRQ0
21
22
Ground
Host IOW
23
24
Ground
Host IOR
25
26
Ground
IOCHRDY
27
28
Host ALE
DACK0
29
30
Ground
IRQ14
31
32
No connect
Address 1
33
34
No connect
Address 0
35
36
Address 2
Chip select 0
37
38
Chip select 1
Activity
39
40
Ground
n
J26: Secondary IDE Connector
1.31 PS/2 KEYBOARD/MOUSE CONNECTOR (J27)
Signal
Name
Pin
#
Pin
#
Signal
Name
N.C.
10
5
N.C.
KB clock
9
4
Mouse clock
KB data
8
3
Mouse data
VCC
7
2
VCC
Ground
6
1
Ground
Pin #
Signal Name
1
+5V
2
KBCLK-OUT
3
KBCLK-IN
4
KBDAT-OUT
5
KBDAT-IN
6
Ground
Signal
Name
Pin
#
Pin
#
Signal
Name
Reset IDE
1
2
Ground
Host data 7
3
4
Host data 8
Host data 6
5
6
Host data 9
Host data 5
7
8
Host data 10
Host data 4
9
10
Host data 11
Host data 3
11
12
Host data 12
Host data 2
13
14
Host data 13
Host data 1
15
16
Host data 14
Host data 0
17
18
Host data 15
Ground
19
20
Key
DRQ0
21
22
Ground
Host IOW
23
24
Ground
Host IOR
25
26
Ground
IOCHRDY
27
28
Host ALE
DACK0
29
30
Ground
IRQ14
31
32
No connect
Address 1
33
34
No connect
Address 0
35
36
Address 2
Chip select 0
37
38
Chip select 1
Activity
39
40
Ground
VCC
41
42
VCC
Ground
43
44
N.C.
