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Chapter 5
Chapter 5 Ports and Connectors
COM (Serial) Ports
The pin functions of COM 1 will vary according to BIOS’ setting. JP2 (for COM1) is designed to
configure Serial COM port to pure RS232 or RS232 with power. Refer to “COM 1 RS232/Power
Select” in Chapter 4 for more information.
COM 2, COM 3 and COM 4 are fixed at RS232.
The serial ports are asynchronous communication ports with 16C550A-compatible UARTs that
can be used with modems, serial printers, remote display terminals, and other serial devices.
Connecting External Serial Ports
Your COM port may come mounted on a card-edge bracket. Install the card-edge bracket to
an available slot at the rear of the system chassis then insert the serial port cable to the COM
connector. Make sure the colored stripe on the ribbon cable is aligned with pin 1 of the COM
connector.
COM 1: RS232/422/485
BIOS Setting
Configure the serial COM ports including the communication mode in the Advanced menu
(“SIO NUVOTON6106D” submenu) of the BIOS. Refer to Chapter 7 for more information.
COM 4
COM 3
COM 1
COM 2
Socket LGA1151
2
1
39
40
LVDS LCD Panel
Mini PCIe
mSATA
LAN 1
LAN 2
DC-in
DDR4_2 SODIMM
DDR4_1 SODIMM
HDMI/DP
DVI-D
USB 3-4
USB 3.0
USB 1-2
USB 3.0
S/PDIF
1
10
9
Front Audio
2
1
Buzzer
1
2
Battery
Intel
H110
SPI Flash
BIOS
PCIe 1 (PCIe x4)
10
9
1
2
10
9
1
2
10
9
1
2
10
9
1
2
COM 2
COM 3
COM 4
COM 1
1
1
SATA 0
SATA 3
9
1
2
10
9
1
2
10
USB
5-6
USB
7-8
SATA 3.0
1 2
1112
Front
Panel
Digital
I/O
1
USB 2.0
LCD/Inverter
Power
Standby
Power LED
1
System Fan 1
1
1
CPU Fan
Digital
I/O Power
1
SATA
Power
5
1
6
2
6
5
2
1
3
1
1
1
1
1
1
2
5
6
SMBus
Auto Power-on
Select (JP1)
COM 1
RS232/Power
Select (JP2)
LCD/Inverter Power Select (JP7)
Backlight
Power
Select
(JP6)
Panel Power
Select (JP8)
(J
P5)
(JP5)
Clear CMOS Data
ASMedia
ASM1442
ASMedia
ASM1442
Intel
WGI211AT
Chassis
Intrusion
ME Disable
1
COM 2/3/4: RS232
2
1
9
DCD
RD
TD
DT
R
GND
DSR
RT
S
CTS
RI
COM 1
RS232
RD
DCD
TD
DT
R
GND
DSR
RT
S
CTS
RI
RS422
Full Duplex
RX
-
RX+ TX+
TX
-
GND
N.C.
N.C.
N.C.
N.C.
RS485
D
ATA
-
D
ATA
+
N.C.
GND
N.C.
N.C.
N.C.
N.C.
N.C.
2
1
9
2
1
9
2
1
9
2
1
9
10
