AK4543 Datasheet, PDF (19/31 Pages) Asahi Kasei Microsystems – AC’97 Rev 2.1 Multimedia Audio CODEC

[ASAHI KASEI]
n Record Gain Register (Index 1Ch)
Mute Gx3 Gx2 Gx1 Gx0 Gain
0
0
0
0
0
0dB
0
0
0
0
1
1.5dB
0
0
0
1
0
3.0dB
--------------------------------------------------------------
0
1
1
1
1
22.5dB
1
X
X
X
X
Mute
[AK4543]
n General Purpose Register (Index 20h)
The following table indicates how to control several miscellaneous functions of the AK4543.
POP
3D
MIX
MS
LPBK
Bit
D15
D13
D9
D8
D7
Function
PCM(DAC) Bypass 3D
0= Via 3D Path, 1= 3D Bypass
3D Stereo Enhancement
0=Off, 1=On
Mono Output Select
0=Mix, 1=Mic
Mic Select
0=Mic1, 1 =Mic2
ADC/DAC Loopback Mode
1= Loopback
An active bit(“1”) in D15(POP) will pass DAC output to Line_OUT or LNLVL_OUT directly, while a “0” in D15 will
put DAC output into Input Mixers or AKM’s 3D enhancement circuit.
D13(3D) will activate the AKM’s 3D enhancement.
LPBK(ADC/DAC Loopback Mode) bit enables loopback of the ADC output to slot3 &4 of DAC input for
both the Primary codec and Secondary codec on the same AC-Link. Generally done for system testing.
n 3D Control Register (Index 22h)
The following table shows the relationship between the bit and depth of 3D enhancement.
DP1
0
0
1
1
DP0
0
1
0
1
Depth
0%
50%
70%
100%
Recommended Application
Off
Audio
Audio
Game
<M0046-E-01>
- 19 -
1999/01