Table of Contents
Advertisement
Chapter 5 Installation
5.3 J2, J19: USB Connectors
J2 is a standard USB external connector consisting of two stacked ports.
J19 is a 10-pin header that supports an optional USB connector that can
only be used under Windows 98.
USB0
USB1
J2
Signal Name
5
1
Vcc
6
2
7
USB-
3
8
4
USB+
J19
Ground
5.4 J3, J4 Serial Ports
The onboard serial ports J3 and J4, are two DB-9 external connectors.
The following table shows the pin-out assignments of these connectors.
Signal Name
DCD, Data carrier detect
RXD, Receive data
TXD, Transmit data
DTR, Data terminal ready
GND, ground
J3 (COM1 )
24
TI5VGA Socket 7 MVP3 ATX Motherboard User's Manual
J2 Pin #
Signal Name
1/5
Vcc
2/6
USB-
3/7
USB+
4/8
Ground
Pin #
Signal Name
1
5
No Connect
2
6
3
7
4
8
Pin #
Pin #
1
6
DSR, Data set ready
2
7
RTS, Request to send
3
8
CTS, Clear to send
4
9
RI, Ring indicator
5
10
J5 (Parallel Port)
J4 (COM2)
USB-
USB+
Ground
Signal Name
Not Used
Advertisement
Table of Contents
