AK4541VQ データシートの表示（PDF） - Asahi Kasei Microdevices

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AK4541VQ

AC’97™ Rev 2.1 Multimedia Audio CODEC

Asahi Kasei Microdevices 

[ASAHI KASEI]

[AK4541]

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 AK4541 is mute off at default state.

The PC Beep is routed to L & R Line outputs directly when AK4541 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

<M0047-E-01>

- 18 -

1999/01

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