AK4571 Datasheet, PDF (4/54 Pages) Asahi Kasei Microsystems – USB I/F Audio CODEC

ASAHI KASEI
[AK4571]
No.
Signal Name
I/O
USB Interface
46 DP
I/O
47 DN
I/O
Reset, Crystal, PLL
45 RSTN
I
44 SUSN
O
5 XTALOUT
O
6 XTALIN
I
9 LFLT_SYS
O
10 LFLT_44K
O
11 LFLT_48K
O
Analog Input/Output
12 VCOM
O
27 VRAD
O
26 VRDA
O
14 MICIN
I
15 AMP1O
O
16 AMP2I
I
17 AMP2O
O
21 LOUT
O
25 ROUT
O
19 LBFI
I
20 LBFO
O
22 RBFI
I
23 RBFO
O
13 MICBIAS
O
External Headphone Amplifier Control
6 EPSW
O
7 STBY
O
8 EMSW
O
Ana / Dig
D
D
Description
USB bus Non-Inverting pin.
Since the AK4571 is a full-speed device, a 1.5kΩ resistor must be
connected between D+ node to VD.
USB bus Inverting Pin.
D
Reset Pin. Low input resets the chip.
Schmitt Trigger input.
D
Suspend Pin
"L": Suspend Mode
“H”: Normal Mode
A
Crystal Oscillator Output, Connect Crystal Resonator. Connect capacitor
A
Crystal Oscillator Input, Connect Crystal Resonator. Connect capacitor
A
System PLL loop filter Pin. Connect 2.7kΩ resistor and 22nF capacitor in
series externally.
A
Codec PLL loop filter Pin. Connect120kΩ resistor and 6.8nF capacitor in
series externally.
A
Codec PLL loop filter Pin. Connect120kΩ resistor and 6.8nF capacitor in
series externally.
A
Analog Common Voltage Reference Pin
A
ADC Common Voltage Reference Pin.
A
ADC Common Voltage Reference Pin.
A
Mono Channel Microphone Input
A
Mono Channel 1^st Amplifier Output Pin
A
Mono Channel 2^nd Amplifier Input Pin
A
Mono Channel 2^nd Amplifier Output Pin
Please Connect 1nF capacitor.
A
Left Channel D/A Out
A
Right Channel D/A Out
A
Left Channel Bass Boost Filter Input Pin
A
Left Channel Bass Boost Filter Output Pin
A
Right Channel Bass Boost Filter Input Pin
A
Right Channel Bass Boost Filter Input Pin
A
Voltage Reference Output for the Microphone’s bias voltage
When the chip goes into Suspend mode, this pin goes to Hi-Z.
External Headphone Amplifier Power Switch Control Pin 1
“H”: Normal Operation
“L”: Suspend Mode
External Headphone Amplifier Power Switch Control Pin 2
“L”: Normal Operation
“H”: Suspend Mode
External Headphone Amplifier Mute Control Pin
“H”: MUTE ON
“L”: MUTE OFF
MS0153-J-02
-4 -
2003/3