alc888s Realtek Semiconductor Corporation, alc888s Datasheet - Page 79

• Manufacturer Part Number: alc888s
• Description: 7.1+2 Channel High Definition Audio Codec With Two Independent S/pdif-out
• Manufacturer: Realtek Semiconductor Corporation

10.2. Onboard Front Panel Header Connection
Option 1 in Figure 20 comes from by Intel’s front panel IO connectivity design guide. A drawback of this
option is that the ports connected to the front panel must use the same jack detection pin. According to the
HD Audio standard specification, ports A/B/C/D use ‘Sense A’ as the jack detect pin; ports E/F/G/H use
‘Sense B’ as the jack detect pin. This is not a good option when the system integrators want to use port-A
(pin 39/41) and port-F (pin 16/17) to be the front panel ports, as ‘Sense A’ and ‘Sense B’ cannot be tied
together.
Option 2 in Figure 20 shows an alternative front panel header design that is also compatible with standard
front panel I/O cable. The option 2 header design lets the two ports use an individual sense pin, and is
compatible with current HD Audio front panel cable.
7.1+2 Channel High Definition Audio Codec
w/Two Independent S/PDIF-OUT
Option 1: Follow Intel's HD Audio front panle header design
(Two ports must be in the same jack detect group)
Option 2: A more flexible front panel header
(Each port can be in different jack detect group)
MIC2-L
MIC2-R
LINE2-R
LINE2-L
MIC2-L
MIC2-R
LINE2-R
LINE2-L
C35
C37
C38
C39
C44
C46
C48
C51
MIC2-VREFO
100u
100u
1u
1u
MIC2-VREFO
100u
100u
1u
1u
FRONT-IO-JD
1N4148
R11
4.7K
D3
1N4148
R20
4.7K
D5
1N4148
R12
4.7K
D4
Onboard front
panel header
1N4148
R21
4.7K
Figure 20. Onboard Front Panel Header Connection
D6
Onboard front
panel header
J3
1
3
5
7
9
CON10A
J5
1
3
5
7
9
CON10A
10
2
4
6
8
10
2
4
6
8
Key
Key
MIC2-JD
LINE2-JD
39.2K,1%
R25
R26
PRESENCE#
R19
PRESENCE#
20K,1%
39.2K,1%
R14
10K
R23
10K
MIC2-JD
LINE2-JD
+3.3VD
+3.3VD
R18
20K,1%
System GPI
System GPI
Sense B
Sense B
71
HD Audio Front Panel I/O Cable
FIO-PORT1-L
FIO-PORT1-R
FIO-PORT2-R
FIO-SENSE
FIO-PORT2-L
FIO-PORT2-R
FIO-PORT2-L
FIO-PORT1-R
FIO-PORT1-L
ALC888S & ALC888SDD
Track ID: JATR-1076-21
1
3
5
7
9
CON10A
J2
L14
L15
L16
L17
10
2
4
6
8
FERB
FERB
FERB
FERB
FIO-PRESENCE#
PORT1-SENSE -RETURN
KEY
PORT2-SENSE -RETURN
FIO-SENSE
C41
100P
FIO-SENSE
C49
100P
PORT2-SENSE-RETURN
PORT1-SENSE -RETURN
C42
100P
C50
100P
Datasheet
JACK 7
FIO-PORT2 (Jack-E)
JACK 8
FIO-PORT1 (Jack-F)
4
3
5
2
1
4
3
5
2
1
Rev. 1.2