AK4571 Datasheet, PDF (21/54 Pages) Asahi Kasei Microsystems – USB I/F Audio CODEC

ASAHI KASEI
[AK4571]
2.8.
Device topology and function
USB
Mut e/AGC/Bass boost
/
/
AK4571
Audio Control (AC) Interface Descriptor
Device Request
1) A/D IN Endpoint#1
(
[OT1]
20dB
)
FU1
Gain/Attenuation/Mute MIC
A/D
2) D/A OUT Endpoint#2 Lineout
D/A
FU2
Gain/Attenuation/Mute
MIC
Attenuation/Mute LineOut
3) HID Endpoint#3
INPUT
Microphone
MIC
(+20dB)
IT1
ID:1
D/A
(Analog)
IT2
ID:3
Audio Streaming
Interface #2
OUT Endpoint #2
Audio Control Interface #0
FU2
ID:6
MU1
D/A
Σ
ID:9
SU1
ID:7
HID Interface #3
IN Endpoint #3
IPGA
FU1
A/D
ID:5
OPGA
FU3
ID:8
Figure 11 AK4571 Topology
OUTPUT
Audio Streaming
Interface #1
IN Endpoint #1
OT1
ID:2
LineOut
OT2
ID:4
MS0153-J-02
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