Asus M4A78 PLUS - Manual (Page 37)

5. USB connectors (10-1 pin USBE12, USBE34, USB910)
These connectors are for USB 2.0 ports. Connect the USB module cable to any of
these connectors, then install the module to a slot opening at the back of the system
chassis. These USB connectors comply with USB 2.0 specification that supports up to
480 Mbps connection speed.
Never connect a 1394 cable to the USB connectors. Doing so will damage the
motherboard!
The USB 2.0 module is purchased separately.
M4A78 PLUS
M4A78 PLUS USB2.0 connectors
PIN 1
USB+5
V
USB_P4
-
USB_P4
+
GND NC
USB+5V USB_P3
-
USB_P3
+
GND
USBE34 USB910
PIN 1
USB+5
V
USB_P10- USB_P10+ GND NC
USB+5V USB_P9
-
USB_P9
+
GND
USBE12
PIN 1
USB+5
V
USB_P2
-
USB_P2
+
GND NC
USB+5V USB_P1
-
USB_P1
+
GND
6. Serial port connectors (10-1 pin COM1)
The connector is for a serial (COM) port. Connect the serial port module cable to the
connector, then install the module to a slot opening at the back of the system chassis.
The serial port bracket (COM1) is purchased separately.
M4A78 PLUS
M4A78 PLUS Serial port (COM1) connector
PIN 1
COM1
Chapter 1: Product introduction 1-27