alc885-gr Realtek Semiconductor Corporation, alc885-gr Datasheet - Page 92

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alc885-gr

Manufacturer Part Number
alc885-gr
Description
7.1+2 Channel High-performance Hda Codec With Content Protection
Manufacturer
Realtek Semiconductor Corporation
Datasheet

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Quantity
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Part Number:
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Option 1 in Figure 19 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 19 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-Performance HDA Codec
With Content Protection
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
D6
Onboard front
panel header
J3
1
3
5
7
9
CON10A
J5
1
3
5
7
9
CON10A
10
2
4
6
8
Figure 19. Front Panel Header Connection
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
84
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
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
ALC885 Series
Datasheet
JACK 7
FIO-PORT2 (Jack-E)
JACK 8
FIO-PORT1 (Jack-F)
4
3
5
2
1
4
3
5
2
1
Rev. 1.1