User manual

23 Chapter 2
2.7 Serial Ports (COM1, COM2, COM3 & COM4)
The AIMB-556 offers three serial ports and one onboard connector. The
user can use JSETCOM2 to select among RS-232/422/485 modes for
COM2. These ports can connect to serial devices, such as a mouse or a
printer, or to a communications network.
The IRQ and address ranges for both ports are fixed. However, if you
want to disable the port or change these parameters later, you can do this
in the system BIOS setup.
Different devices implement the RS-232/422/485 standards in different
ways. If you are having problems with a serial device, be sure to check
the pin assignments for the connector.
L
A
N
1_
U
S
B
12
L
A
N
1_
U
S
B
12
LAN2_USB34
LAN2_USB34
AUDIO1
AUDIO1
K
B
M
S
1
K
B
M
S
1
VGA2
VGA2
CN1
CN1
SPI_CN1
SPI_CN1
JSETCOM2
JSETCOM2
CN2
CN2
JCASE1
JCASE1
SP1
SP1
1 2 3 4 5 6 7 8 9
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18
18
19
19
20
20
21
21
22
22
23
23
24
24
25
25
26
26
27
27
28
28
29
29
A
B
C
D
E
F
G
H
J
K
L
M
N
P
R
T
U
V
W
Y
AA
AA
AB
AB
AC
AC
AD
AD
AE
AE
AF
AF
AG
AG
AH
AH
AJ
AJ
U22
U22
PSON1
PSON1
LPT1
LPT1
COM1
COM1
VGA1
VGA1
CPU1
CPU1
CN22
CN22
BAT1
BAT1
CHAFAN2
CHAFAN2
C
P
U
F
A
N
1
C
P
U
F
A
N
1
SYSFAN1
SYSFAN1
SPI_CS_CN1
SPI_CS_CN1
J16
J16
CMOS1
CMOS1
JWDT1
JWDT1
ATX1
ATX1
VP1
VP1
JIR1
JIR1
HS1
HS1
HD1
HD1
COM3
COM3
COM4
COM4
COM2
COM2
LANLED1
LANLED1
MH7
MH7
MH8
MH8
MH5
MH5
MH4
MH4
MH2
MH2
MH1
MH1
MH3
MH3
SATA2
SATA2
SATA1
SATA1
USB78
USB78
USB56
USB56
ATX2
ATX2
FDD1
FDD1
IDE1
IDE1
LVDS1
LVDS1
PCIEX-4X1
PCIEX-4X1
PCI1
PCI1
PCI2
PCI2
PCIE-16X1
PCIE-16X1
DIMMB1
DIMMB1
DIMMA1
DIMMA1
U14
U14
1
51
51
A
Update Second SPI:2-3 Close
Update Second SPI:2-3 Close
Update First SPI:1-2 Close
Update First SPI:1-2 Close
ATX MODE:2-3 Close
ATX MODE:2-3 Close
AT MODE:1-2 Close
AT MODE:1-2 Close
19C2055603
19C2055603
MADE IN TAIWAN
MADE IN TAIWAN
01-4
01-4
AIMB-556 REV:A1
AIMB-556 REV:A1
LED1
LED1
PCIE_SW1
PCIE_SW1
JFP1
JFP1
JFP2
JFP2
JFP3
JFP3
LED2
LED2
SATA3
SATA3
COM1
COM3 COM4
COM2