AK4545 Datasheet, PDF (23/33 Pages) Asahi Kasei Microsystems – AC97 AUDIO CODEC WITH SRC AND DIT

[ASAHI KASEI]
n 3D Control Register (Index 22h)
The following table shows the relationship between the bit and 3D Depth.
DP3 DP2 DP1 DP0 Depth Recommended Application
0
0
0
0
0%
Off
0
0
0
1
50%
Audio
0
0
1
0
50%
Audio
0
0
1
1
50%
Audio
0
1
0
0
50%
Audio
0
1
0
1
50%
Audio
0
1
1
0
50%
Audio
0
1
1
1
50%
Audio
1
0
0
0
70%
Audio
1
0
0
1
70%
Audio
1
0
1
0
70%
Audio
1
0
1
1
70%
Audio
1
1
0
0
70%
Audio
1
1
0
1
70%
Audio
1
1
1
0
70%
Audio
1
1
1
1
100%
Game
[AK4545]
n Powerdown Control/Status Register (Index 26h )
BitsD0 to D3 are read only. Any write to these bits will not affect the AK4545. These bits are used as status bits to
subsections of the AC’97 codec. A 1 indicates the subsection is “ready” or that is capable of performing in a nominal
manner.
Bit
REF D3
ANL D2
DAC D1
ADC D0
Function
Vref up to nominal state
0=NOT ready, 1=ready,
Analog mixers, etc ready
0=NOT ready, 1=ready
DAC section ready to accept data
0=NOT ready, 1=ready
ADC section ready to transmit data
0=NOT ready, 1=ready
The power down modes are as follows.
Bit
PR0
D8
PR1
D9
PR2 D10
PR3 D11
PR4 D12
PR5 D13
PR6 D14
PR7 D15
Function
PCM in ADC’s & Input Mux Powerdown
PCM out DACs Powerdown
Analog Mixer Powerdown (Vref still on)
Analog Mixer Powerdown (Vref off)
Digital Interface (AC-link) Powerdown
Internal Clk disable
True Line Level Out Powerdown
EAPD(External Amplifier Powerdown)
When PR3 is set to “1”, ADC, DAC, Mixer, True Line Lever Out, and VREF are powered down even if any PRx bit are
“0”. When PR3 bit is reset to “0”, the AK4545 resumes the previous state by referencing previous PRx bit. In this
case, the AK4545 outputs corresponding slot-x valid bits in the slot 0 as “0” until the AK4545 is power-up.
EAPD(External Amplifier Power Down) bit controls an external audio amplifier. EAPD=”0” places a “0”(L) on the
output pin, enabling an external audio amplifier, EAPD= ”1”(H) shuts it down. Power-up default is
EAPD=”0”(external audio amplifier enabled).
MS0058-E-00
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2000/11