15
GETTING TO KNOW YOUR MTC-4021
Serial
Port
Pin No.
RS-232
RS-422
(5-wire)
RS-422
(9-wire)
RS-485
(3-wire)
1, 2
3, 4
1
DCD
TXD-
TXD-
DATA-
2
RXD
TXD+
TXD+
DATA+
3
TXD
RXD+
RXD+
-----------
4
DTR
RXD-
RXD-
-----------
5
GND
GND
GND
GND
6
DSR
-----------
RTS-
-----------
7
RTS
-----------
RTS+
-----------
8
CTS
-----------
CTS+
-----------
9
RI
-----------
CTS-
-----------
The pin assignments are listed in the table as follow :
2.2.12 Audio Connector
There are 2 audio connectors, Mic-in and Line. Onboard Realtek ALC892
audio codec supports 5.1 channel HD audio and fully complies with Intel
®
High
Definition Audio (Azalia) specifications.
To utilize the audio function in Windows platform, you need to install
corresponding drivers for both Intel Broadwell-U chipset and Realtek ALC892
codec.
COM4
COM3
COM2
COM1
CFast
SIM 2
SIM 1
LAN6
LAN5
LAN4
LAN3
RESET
DC-IN 6V~36V
USB3.0
USB2.0
DVI-D
LAN2 LAN1
DP