adld25pc Advanced Digital Logic, Inc., adld25pc Datasheet - Page 33
adld25pc
Manufacturer Part Number
adld25pc
Description
Highly Complex Computer Motherboard In The Pc/104
Manufacturer
Advanced Digital Logic, Inc.
Datasheet
1.ADLD25PC.pdf
(70 pages)
- Current page: 33 of 70
- Download datasheet (3Mb)
COM3 and COM4
3.15 COM3 and COM4
The serial interfaces COM3 and COM4 are provided via a 2x5pin connector (FCI 98424-G52-10LF,
mating connector e.g. FCI 90311-010LF). For these two interfaces, both RS232 and RS485 protocols are
available. This can be configured in BIOS setup.
Pinout in RS422/485 mode:
Proper use of RS485 requires that the signal RTS (Request To Send) be toggled on an off in order to turn
on and off the transmit function. It is the responsibility of the software application to assert control over the
RTS line.
ADL Embedded Solutions ADLD25PC
data carrier detect
receive data
transmit data
data terminal ready
ground
transmit data +
receive data +
reserved
reserved
ground
Description
Description
N
OTE
RXD
TXD
GND
RX
N/C
N/C
GND
DCD
DTR
TX
Name
Name
1
2
3
4
5
1
2
3
4
5
Pin
Pin
6
7
8
9
10
6
7
8
9
10
DSR
RTS
CTS
RI
VCC
TX#
RX#
N/C
N/C
VCC
Name
Name
data set ready
request to send
clear to send
ring indicator
5 volt supply
transmit data -
receive data -
reserved
reserved
5 volt supply
Chapter: Connectors
Description
Description
page 33
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