ASAHI KASEI
[AK4571]
ピン／機能
No.
Signal Name
I/O
Ana / Dig
Description
USB Interface
46
DP
I/O
D
USB bus Non-Inverting pin.
Since the AK4571 is a full-speed device, a 1.5kW resistor must be
connected between D+ node to VD.
47
DN
I/O
D
USB bus Inverting Pin.
Reset, Crystal, PLL
45
RSTN
I
D
D
Reset Pin. Low input resets the chip.
Schmitt Trigger input.
Suspend Pin
44
SUSN
O
"L": Suspend Mode
“H”: Normal Mode
5
6
9
XTALOUT
XTALIN
LFLT_SYS
O
I
O
A
A
A
Crystal Oscillator Output, Connect Crystal Resonator. Connect capacitor
Crystal Oscillator Input, Connect Crystal Resonator. Connect capacitor
System PLL loop filter Pin. Connect 2.7kW resistor and 22nF capacitor in
series externally.
10
11
LFLT_44K
LFLT_48K
O
O
A
A
Codec PLL loop filter Pin. Connect120kW resistor and6.8nF capacitor in
series externally.
CodecPLL loop filter Pin. Connect120kW resistor and6.8nF capacitor in
series externally.
Analog Input/Output
12
27
26
14
15
16
17
VCOM
VRAD
VRDA
MICIN
AMP1O
AMP2I
AMP2O
O
O
O
I
O
I
A
A
A
A
A
A
A
Analog Common Voltage Reference Pin
ADC Common Voltage Reference Pin.
ADC Common Voltage Reference Pin.
Mono Channel Microphone Input
Mono Channel 1st Amplifier Output Pin
Mono Channel 2nd Amplifier Input Pin
O
Mono Channel 2nd Amplifier Output Pin
Please Connect 1nF capacitor.
21
25
LOUT
ROUT
O
O
A
A
Left Channel D/A Out
Right Channel D/A Out
19
20
22
23
13
LBFI
LBFO
RBFI
RBFO
MICBIAS
I
O
I
O
O
A
A
A
A
A
Left Channel Bass Boost Filter Input Pin
Left Channel Bass Boost Filter Output Pin
Right Channel Bass Boost Filter Input Pin
Right Channel Bass Boost Filter Input Pin
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 Control
6
7
8
EPSW
STBY
EMSW
O
O
O
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
2003/3
- 4 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
