Asus A7N8X-VM/400 - Manual (Page 31)

ASUS A7N8X-VM/400 motherboard user guide 1-21
11. Digital audio connector (6-1 pin SPDIF1)
This connector is for an optional S/PDIF audio module that allows digital
instead of analog sound input and output. The S/PDIF port module is
purchased separately.
A7N8X-VM
A7N8X-VM/400 Digital Audio Connector
SPDIF1
GND
+5V SPDIF_IN SPDIF_OUT
1
GND
When you input sound for S/PDIF IN, the LINE_OUT outputs the
sound. Mute LINE_OUT to impede sound output from S/PDIF IN.
12. Serial connector (10-1 pin COM2)
This connector accommodates a second serial port using an optional serial
port module. Connect the module cable plug to this connector, then install the
module into a slot opening at the back of the system chassis.
A7N8X-VM
A7N8X-VM/400 Serial Connector
PIN 1
COM2
The serial port module is purchased separately.