Asus M4A88T-M/USB3 - Manual (Page 39)

5. USB connectors (10-1 pin USB78, USB910, USB1112)
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
480Mbps 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.
6. Serial port connector (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 module is purchased separately.
M4A88T-M
M4A88T-M Serial port (COM1) connector
PIN 1
COM1
M4A88T-M
M4A88T-M USB2.0 connectors
PIN 1
USB+5
V
USB_P10- USB_P10+ GND NC
USB+5V
USB_P9
-
USB_P9
+
GND
USB910
PIN 1
USB+5
V
USB_P12- USB_P12+ GND NC
USB+5V
USB_P11- USB_P11+
GND
USB1112
PIN 1
USB+5
V
USB_P8
-
USB_P8
+
GND NC
USB+5V
USB_P7
-
USB_P7
+
GND
USB78
ASUS M4A88T-M 1-27