Asus P8H77-M - Manual (Page 45)

ASUS P8H77-M 1-33
6. 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.
7. 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.
P8H77-M
P8H77-M Digital audio connector
SPDIF_OUT
+5
V
SPDIFOUT GND
P8H77-M
P8H77-M Serial port (COM1) connector
PIN 1
COM1
D
C
D
TX
D
G
N
D
R
TS R
I
R
X
D
D
TR
D
S
R
C
TS