AK4543 Datasheet, PDF (18/31 Pages) Asahi Kasei Microsystems – AC’97 Rev 2.1 Multimedia Audio CODEC

[ASAHI KASEI]
[AK4543]
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 AK4543 is mute off at default state.
The PC Beep is routed to L & R Line outputs directly when AK4543 is in a RESET State(Reset# is “L”). 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
thru 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
SR2 SL1 SL0
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 (L)
Video In (L)
Aux In (L)
Line In (L)
Stereo Mix (L)
Mono Mix
Phone
<M0046-E-01>
- 18 -
1999/01