
39
92HDW74D
V 1.0 03/08
EIGHT CHANNEL HD AUDIO CODEC, PREMIUM WLP 3/4 COMPLIANT
92HDW74D
EIGHT CHANNEL HD AUDIO CODEC, PREMIUM WLP 3/4 COMPLIANT
PC AUDIO
4. FUNCTIONAL BLOCK DIAGRAMS
Figure 11. Functional Block Diagram
Stream &
Channel
Select
DAC 0
Stream &
Channel
Select
Stream &
Channel
Select
H
D
Audi
oLI
NK
LOG
IC
PCM to
SPDIF OUT
SPDIF OUT0
vol
Pin Complex
Pins 35/36
DAC 1
vol
PORT D
Digital
Mute
Digital
Mute
V
end
or
Sp
ec
ifi
c
MUX
ADC0
Pin 48
Pin 2
DMIC_0
No Bias
MU
X
ADC1
MU
X
DMIC_1
Pin 3
Stream &
Channel
Select
Pin Complex
Pins 39/41
PORT A
Mic Bias
Σ
vol
mute
vol
mute
vol
mute
CD
vol
mute
Analog PC_BEEP
Digital
Microphone
volume and
mute is done
after the ADC
but shown here
and in widget
list as same as
analog path.
Stream &
Channel
Select
PCM to
SPDIF OUT
ADC0
MUX
ADC1
DAC0
DAC1
Boost
+0/+10/+20/+30 dB
Boost
+0/+10/+20/+30 dB
DMIC
EAPD/SPDIF_IN
Pin 40
Stream &
Channel
Select
DAC 2
vol
Digital
Mute
MU
X
DAC2
Stream &
Channel
Select
DAC 3
vol
Digital
Mute
MUX
DAC3
Pin Complex
Pins 16/17
PORT F
No Bias
Pin Complex
Pins 43/44
PORT G
No Bias
Pin Complex
Pins 45/46
PORT H
No Bias
Stream &
Channel
Select
SPDIF IN
to PCM
Pin Complex
Pins 21/22
PORT B
Mic Bias
InMUX1
InMUX2
Pin Complex
Pins 23/24
PORT C
Mic Bias
Pin Complex
Pins 14/15
PORT E
Mic Bias
Pin Complex
Pins 18/19/20
CD (Port I)
vol
mute
InMUX0
ADC0
Stream &
Channel
Select
vol
Gain
mute
+0 to +22.5 dB
In 1.5 dB steps
Port B
InMUX0
Port D
Port F
Port A
MUX
Pin 47
SPDIF OUT1
1bi
t
ADC1
1b
it
Port B
Port C
Port D
Port A
Port E
MUX
Port G
Port H
Mixer
Port F
CD
DMIC0
DMIC1
vol
Gain
mute
+0 to +22.5 dB
In 1.5 dB steps
Port B
Port C
Port D
Port A
Port E
MUX
Port G
Port H
Mixer
Port F
CD
DMIC0
DMIC1
InMUX3
Port E
InMUX1
Port G
Port H
Port A
MUX
Port C
InMUX2
Port G
Port H
Port B
MUX
DAC1
InMUX3
DAC2
DAC3
DAC0
MUX
-34.5 to +12 dB
In 1.5 dB steps
Boost
+0/+10/+20/+30 dB
Port D
HP
Boost
+0/+10/+20/+30 dB
Port A
HP
Boost
+0/+10/+20/+30 dB
Port B
HP
Boost
+0/+10/+20/+30 dB
Port C
LO
Boost
+0/+10/+20/+30 dB
Port E
LO
Boost
+0/+10/+20/+30 dB
Port F
LO
Boost
+0/+10/+20/+30 dB
Port G
LO
Boost
+0/+10/+20/+30 dB
Port H
LO
CD
-6,-12,-18, -24 dB
MixerOutVol
Vol
-46.5 to 0 dB
In 1.5 dB steps
Mixer
mute
Digital
Mute
Digital
Mute
Digital
Mute
(Vendor Specific)
MUX
Σ
Analog Beep
Digital PC Beep
DAC1
MixerOutVol
DAC0
DAC2
DAC3
MUX
MU
X
Σ
Analog Beep
Digital PC Beep
MUX
Σ
Analog Beep
Digital PC Beep
DAC1
MixerOutVol
DAC0
DAC2
DAC3
MUX
DAC1
MixerOutVol
DAC0
DAC2
DAC3
MUX
MU
X
Σ
Analog Beep
Digital PC Beep
DAC1
MixerOutVol
DAC0
DAC2
DAC3
MUX
Σ
Analog Beep
Digital PC Beep
DAC1
MixerOutVol
DAC0
DAC2
DAC3
MUX
Σ
Analog Beep
Digital PC Beep
DAC1
MixerOutVol
DAC0
DAC2
DAC3
MU
X
MU
X
Σ
Analog Beep
Digital PC Beep
DAC1
MixerOutVol
DAC0
DAC2
DAC3
MUX
Σ
Analog Beep
Digital PC Beep
DAC1
MixerOutVol
DAC0
DAC2
DAC3
MU
X
To all ports
enabled as
output