Asus M5A78L/USB3 - Manual (Page 32)

7. USB 2.0 ports 1 and 2. These two 4-pin Universal Serial Bus (USB) ports connect to
USB 2.0 devices.
8. USB 3.0 ports 3 and 4. These two 9-pin Universal Serial Bus (USB) ports connect to
USB 3.0/2.0 devices.
• DO NOT connect a keyboard / mouse to any USB 3.0 port when installing Windows ®
operating system.
• Due to USB 3.0 controller limitation, USB 3.0 devices can only be used under Windows ®
OS environment and after the USB 3.0 driver installation.
• USB 3.0 devices can only be used as data storage only.
• We strongly recommend that you connect USB 3.0 devices to USB 3.0 ports for faster
and better performance for your USB 3.0 devices.
• USB 3.0 ports are unavailable for any USB devices under DOS environments.
9. Serial port. This 9-pin COM1 port is for pointing devices or other serial devices.
10. PS/2 Keyboard port (purple). This port is for a PS/2 keyboard.
• We recommend that you connect a high-definition front panel audio module to this
connector to avail of the motherboard high-definition audio capability.
• If you want to connect a high definition front panel audio module to this connector, set
the Front Panel Select item in the BIOS to [HD Audio]. See section 2.4.4 Onboard
Devices Configuration for details.
• The front panel audio I/O module is purchased separately.
1.10.2 Internal connectors
1. Front panel audio connector (10-1 pin AAFP)
This connector is for a chassis-mounted front panel audio I/O module that supports
either High Definition Audio or AC`97 audio standard. Connect one end of the front
panel audio I/O module cable to this connector.
M5A78L/USB3
M5A78L/USB3 Front panel audio connector
AAFP
PIN 1
GN
D
PRESENCE# SENSE1_RETUR SENSE2_RETUR
PORT1
L
PORT1
R
PORT2
R
SENSE_SEND
PORT2
L
HD-audio-compliant
pin definition
PIN 1
AGND NC NC NC
MIC2
MICPW
R
Line out_R
NC
Line out_
L
Legacy AC’97
compliant definition
Chapter 1: Product introduction 1-22