Acer Veriton M490G Service Manual page 70

F_AUDIO: Front Panel Audio header for Azalia
This header allows the user to install auxiliary front-oriented microphone and lineout ports for easier access.
Pin
1 PORT 1L
3 PORT 1R
5 PORT 2R
7 SENSE_SEND
9 PORT 2L
F_USB1~4: Front Panel USB headers
The motherboard has four USB ports installed on the rear edge I/O port array. Additionally, some computer
cases have USB ports at the front of the case. If you have this kind of case, use auxiliary USB connector to
connect the front-mounted ports to the motherboard.
Pin
1
2
3
4
5
6
7
8
9
10
COM2: Onboard serial port header
Connect a serial port extension bracket to this header to add a second serial port to your system.
Pin
1
2
3
4
5
6
7
8
Chapter 5
Signal Name
Signal Name
USBPWR me
USBPWR
USB_FP_P0-
USB_FP_P1-
USB_FP_P0+
USB_FP_P1+
GND
GND
Key
USB_FP_OC0
Signal Name
DCD me
SIN
SOUT
DTR
GND
DSR
RTS
CTS
Pin
2 AUD_GND
4 PRESENCE#
6 SENSE1_RETURN
8 KEY
10 SENSE2_RETURN
Function
Front Panel USB Power
Front Panel USB Power
USB Port 0 Negative Signal
USB Port 1 Negative Signal
USB Port 0 Positive Signal
USB Port 1 Positive Signal
Ground
Ground
No pin
NC
Function
Data Carrier Detect
Serial Input
UART B Serial Output
UART B Data Terminal Ready
Ground
Data Set Ready
RART B Request to Send
Clear to Send
Signal Name
62