Asus A55M-A/USB3 - Manual (Page 39)

6. Digital audio connector (4-1 pin SPDIF_OUT)
This connector is for an additional Sony/Philips Digital Interface (S/PDIF) port.
The S/PDIF module is purchased separately.
• We recommend that you connect a high-definition front panel audio module to this
connector to avail of the motherboard high-definition audio capability.
• If you want to connect a high definition front panel audio module to this connector, set
the Front Panel Type item in the BIOS to [HD]. See section 2.5.5 Onboard Devices
Configuration for details.
• The front panel audio I/O module is purchased separately.
7. Front panel audio connector (10-1 pin AAFP)
This connector is for a chassis-mounted front panel audio I/O module that supports
either High Definition Audio or AC`97 audio standard. Connect one end of the front
panel audio I/O module cable to this connector.
SPDIF_OUT
+5V SPDIFOUT GND A55M-A/USB3
A55M-A/USB3 Digital audio connector
A55M-A/USB3
A55M-A/USB3 Front panel audio connector
AAFP
PIN 1
AGND NC SENSE1_RETUR SENSE2_RETUR
PORT1 L PORT1 R PORT2 R
SENSE_SEND
PORT2 L
HD-audio-compliant
pin definition
PIN 1
AGND NC NC NC
MIC2
MICPWR
Line out_R
NC
Line out_L
Legacy AC’97
compliant definition
ASUS A55M-A Series 1-27