Asus M3N-HT Deluxe/Mempipe - Manual (Page 63)

ASUS M3N-HT Deluxe Series 2-37
11. 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.
M3N-HT DELUXE
M3N-HT DELUXE Serial port2(COM1) connector
COM1
12. Digital audio connector (4-1 pin SPDIF_OUT)
This connector is for an additional Sony/Philips Digital Interface (S/PDIF)
port(s). Connect the S/PDIF Out module cable to this connector, then install
the module to a slot opening at the back of the system chassis.
The S/PDIF module is purchased separately.
M3N-HT DELUXE
M3N-HT DELUXE Digital audio connector
+5V SPDIFOUT GND
SPDIF_OUT