
IDT CONFIDENTIAL
49
V 0.987 11/09
2009 INTEGRATED DEVICE TECHNOLOGY, INC.
92HD81
SINGLE CHIP PC AUDIO SYSTEM, CODEC+SPEAKER AMPLIFIER+CAPLESS HP+LDO
4. FUNCTIONAL BLOCK DIAGRAMS
TA revision, Port C is input only, if Output is needed use YD or UA revision..
Figure 10. Functional Block Diagram
Stream &
Channel
Select
DAC 0
Stream &
Channel
Select
Stream &
Channel
Select
H
D
A
ud
io
LI
N
K
LO
G
IC
PCM to
SPDIF OUT
SPDIF OUT0
vol
DAC 1
Digital
Mute
Digital
Mute
MU
X
ADC0
Pin 48
Pin 4
DMIC_0
MU
X
ADC1
MU
X
DMIC_1
(shared)
DMIC_1
Pin 46
Stream &
Channel
Select
Σ
vol
mute
vol
mute
vol
mute
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
MU
X
ADC1
DAC0
DAC1
Mixer
Boost
+0/+10/+20/+30 dB
Boost
+0/+10/+20/+30 dB
DMIC
Pin 46
Pin Complex
Pins 19/20
PORT C
Mic Bias
Pin Complex
Pins 39/41/43/44
PORT D
PORT E
ADC0
Stream &
Channel
Select
vol
Gain
mute
0 to +22.5 dB
In 1.5 dB steps
SPDIF OUT1 (shared)
1bi
t
ADC1
1
bit
vol
Gain
mute
0 to +22.5 dB
In 1.5 dB steps
-34.5 to +12 dB
In 1.5 dB steps
Boost
+0/+10/+20/+30 dB
Port C
LO
Boost
+0/+10/+20/+30 dB
Port E
LO
0,-6,-12,-18dB
PORT F
Boost
+0/+10/+20/+30 dB
Port F
LO
BTL
Mono
LO
Pin Complex
Pin 27
Pin Complex
Pins 17/18
Pin Complex
Pins 15/16
Port C
Port E
Port F
Class-AB
vol
Pin Complex
Pins 28/29
PORT A
Boost
+0/+10/+20/+30 dB
Port A
HP
Pin Complex
Pins 31/32
PORT B
HP
Cap-less
Port C
Port E
MU
X
Mixer
Port F
DMIC0
DMIC1
Port A
Port C
Port E
MU
X
Mixer
Port F
DMIC0
DMIC1
Port A
MU
X
Σ
Analog Beep
Digital PC Beep
MU
X
Σ
Analog Beep
Digital PC Beep
MU
X
Σ
Analog Beep
Digital PC Beep
MU
X
Σ
Analog Beep
Digital PC Beep
MU
X
Σ
Analog Beep
Digital PC Beep
MU
X
Σ
Analog Beep
Digital PC Beep
MU
X
Σ
Analog Beep
Digital PC Beep
vol
mute
vol
mute
DAC0
Port A
DAC1
Mic Bias
Vol
-46.5 to 0 dB
In 1.5 dB steps
mute
MixerOutVol
DAC1
MixerOutVol
DAC0
MU
X
DAC1
MixerOutVol
DAC0
MU
X
DAC1
MixerOutVol
DAC0
MU
X
DAC1
MixerOutVol
DAC0
MU
X
DAC1
MixerOutVol
DAC0
MU
X
DAC1
MixerOutVol
DAC0
MU
X
DAC1
MixerOutVol
DAC0
MU
X