AK4544A Datasheet, PDF (20/35 Pages) Asahi Kasei Microsystems – AC97 MULTIMEDIA AUDIO CODEC WITH SRC

[ASAHI KASEI]
[AK4544A]
n PC Beep Register (Index 0Ah)
The following table shows the relationship between bits and the attenuation value. The attenuation step is 3dB with
a range of 0 to –45dB. PC_BEEP of the AK4544A is 0dB at default state.
The PC Beep is routed to L & R Line outputs directly when AK4544A is in a RESET State(Reset# is “L”) or when the mixer is
powerdown with Vref on(PR2=”1” and PR3=”0”). The PC BEEP isn’t routed to True Line Level Out under these states. This is so
that Power on Self Test(POST) codes can be heard by the user in case of a hardware problem with the PC. After Reset# goes “H”,
direct PC beep pass through becomes OFF.
Mute _{PV3 PV2 PV1 PV0}
Att.
0
0
0
0
0
0dB
0
0
0
0
1
-3.0dB
0
0
0
1
0
-6.0dB
--------------------------------------------------------------
0
1
1
1
1 -45.0dB
1
X
X
X
X
Mute
n Analog Mixer Input Gain Registers (Index 0Ch-18h)
The following table shows the relationship between bits and the gain/attenuation value. Attenuation step is 1.5dB
with a range of +12dB to –34.5dB.
Mute _{Gx4 Gx3 Gx2 Gx1 Gx0}
Att.
0
0
0
0
0
0
+12dB
0
0
0
0
0
1 +10.5dB
-----------------------------------------------------------------------
0
0
1
0
0
0
0dB
0
0
1
0
0
1
-1.5dB
-----------------------------------------------------------------------
0
1
1
1
1
0 -33.0dB
0
1
1
1
1
1 -34.5dB
1
X
X
X
X
X
Mute
n Record Select Control Register (Index 1Ah)
SR2 SR1 SR0
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
Att.
Mic
CD In (R)
Video In (R)
Aux In (R)
Line In (R)
Stereo Mix (R)
Mono Mix
Phone
<MS0026-E-00>
- 20 -
2000/04