Serial Port Header (Com1_1) - Advantech AIMB-240 Series User Manual

AIMB-240 Series
2.4.3

Serial Port Header (COM1_1)

Default
Signal
Serial output. This signal sends serial data to the communication link. The signal is
set to a marking state on hardware reset when the transmitter is empty or when
TTXD1
loop mode operation is initiated.
RRXD1 Serial input. This signal receives serial data from the communication link.
Data Terminal Ready. This signal indicates to the modem or data set that the
DDTR1#
on-board UART is ready to establish a communication link.
Data Set Ready. This signal indicates that the modem or data set is ready to
DDSR1#
establish a communication link.
Request To Send. This signal indicates to the modem or data set that the on-board
RRTS1#
UART is ready to exchange data.
Clear To Send. This signal indicates that the modem or data set is ready to
CCTS1#
exchange data.
Data Carrier Detect. This signal indicates that the modem or data set has detected
DDCD1#
the data carrier.
Ring Indicator. This signal indicates that the modem has received a telephone
RRI1#
ringing signal.
34 AIMB-240 Series User's Manual
Signal
DDCD1#
TTXD1
GND
RRTS1#
RRI1#
COM1_1 and COM1 (Rear I/O) are
using
connectors cannot be used at the
same time.
Signal Description
PIN PIN
1 2
3 4
5 6
7 8
9 10
the same link,
Signal
RRXD1
DDTR1#
DDSR1#
CCTS1#
No pin
so both