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Technical Description
The OMG-COMM8-PCI utilizes the 16C554 UART. This chip features
programmable baud rate, data format, interrupt control and a 16-byte input and
output FIFO, and is functionally 4 16C550 UARTs. A full array of advanced
UARTS is also available for this card. Contact Omega Engineering for more
information.
Connector Pin Assignments
DB-25 (RS-232 DTE)
Signal
Name
GND
Ground
TD
Transmit Data
RTS
Request To Send
DTR
Data Terminal Ready
RD
Receive Data
CTS
Clear To Send
DSR
Data Set Ready
DCD
Data Carrier Detect
RI
Ring Indicator
DB-9 (EIA-574 DTE) (DB9 MALE)
Signal
Name
GND
Ground
TD
Transmit Data
RTS
Request To Send
DTR
Data Terminal Ready
RD
Receive Data
CTS
Clear To Send
DSR
Data Set Ready
DCD
Data Carrier Detect
RI
Ring Indicator
Technical Note: Please terminate any control signals that are not going to be
used. The most common way to do this is connect RTS to CTS and RI. Also,
connect DCD to DTR and DSR. Terminating these pins, if not used, will help
insure
you
get
OMG-COMM8-PCI
(DB25 MALE)
the
best
performance
Technical Description
Pin #
Mode
7
2
Output
4
Output
20
Output
3
Input
5
Input
6
Input
8
Input
22
Input
Pin #
Mode
5
3
Output
7
Output
4
Output
2
Input
8
Input
6
Input
1
Input
9
Input
from
your
adapter.
Page 5
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