Chapter 5 Installation
20
TI6NB Pentium II 440BX ATX Motherboard User’s Manual
5.6 J2, J3: Serial Ports
The onboard serial ports of the TI6NB, J2 and J3, are two DB-9 external
connectors. The following table shows the pin-out assignments of the
these connectors.
Signal Name
Pin #
Pin #
Signal Name
DCD, Data carrier detect
1
6
DSR, Data set ready
RXD, Receive data
2
7
RTS, Request to send
TXD, Transmit data
3
8
CTS, Clear to send
DTR, Data terminal ready
4
9
RI, Ring indicator
GND, ground
5
10
Not Used
J4 (Parallel Port)
J2 (COM1 )
J3 (COM2)