Asus F1A55 R2.0 - Manual (Page 39)

ASUS F1A55 R2.0 1-27
5. Digital audio connector (4-1 pin SPDIF_OUT)
This connector is for an additional Sony/Philips Digital Interface (S/PDIF) port.
Ensure that the audio device of Sound playback is Realtek High Definition Audio (the
name may be different based on the OS). Go to Start > Control Panel > Sounds and
Audio Devices > Sound Playback to configure the setting.
The S/PDIF module is purchased separately.
4. Serial port connector (10-1 pin COM1)
This connector is for a serial (COM) port. Connect the serial port module cable to this
connector, then install the module to a slot opening at the back of the system chassis.
The COM module is purchased separately.
F1A55 R2.0
F1A55 R2.0 Serial port (COM1) connector
PIN 1
COM1
DCD TXD GND RTS
RI
RXD DTR DSR CTS
SPDIF_OUT
+5V SPDIFOUT GND
F1A55 R2.0
F1A55 R2.0 Digital audio connector