User`s manual

CyberResearch
®
Motherboards MXGD Series
CyberResearch, Inc. 75
25 Business Park Drive P: [phone]; F: [phone]
Branford, CT USA www.cyberresearch.com
4.3.7 Serial Communications Connector
CN Label:
COM1
CN Type:
D-sub 9 Male connector
CN Location:
See Figure 4-21 (labeled 7)
CN Pinouts: See Figure 4-28 and Table 4-29
The serial connector on the external interface panel provides serial connection in the
RS-232 mode.
Figure 4-28: Serial Communications Connector Pinout Locations
PIN DESCRIPTION
1 DATA CARRIER DETECT (DCD)
2 RECEIVE DATA (RXD)
3 TRANSMIT DATA (TXD)
4 DATA TERMINAL READY (DTR)
5 GROUND (GND)
6 DATA SET READY (DSR)
7 REQUEST TO SEND (RTS)
8 CLEAR TO SEND (CTS)
9 RING INDICATOR (RI)
Table 4-29: COM1 RS-232 Mode Connector Pinouts