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CHAPTER 2: Introduction
2.3 Technical Description
The RS-232 Single-Port PCI Card provides a versatile
interface for any RS-232 device including modems,
printers, and plotters.
The Card uses the 16850 UART. This chip features
programmable baud rates, data format, interrupt
control, and industry-leading 128-byte FIFOs.
2.4 RS-232 DB25 Male DTE Connector Pin Assignments
Signal
Name
Pin #
Mode
TD
Transmit Data
2
Output
RTS
Request To Send
4
Output
DTR
Data Term Ready
20
Output
GND
Ground
7
—
RD
Receive Data
3
Input
DCD
Data Carrier Detect
8
Input
DSR
Data Set Ready
6
Input
CTS
Clear To Send
5
Input
RI
Ring Indicator
22
Input
