ak4569 AKM Semiconductor, Inc., ak4569 Datasheet - Page 37

• Manufacturer Part Number: ak4569
• Description: 20-bit Stereo Codec With Ipga & Hp-amp
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
MS0292-E-01
Addr
Addr
0AH
0BH
0CH
ATTL7-0: Setting of the attenuation value of output signal from DACL
ATTR7-0: Setting of the attenuation value of output signal from DACR
ATTM3-0: Analog volume control for MOUT
MMUTE: Mute control for MOUT
Register Name
DAC Lch ATT
DAC Rch ATT
Register Name
MOUT ATT
The AK4569 has channel-independent digital attenuator (256 levels, 0.5dB step). This digital attenuator is
placed before D/A converter. ATTL/R7-0 bits set the attenuation level (0dB to −127dB or MUTE) of each
channel. Digital attenuator is independent of soft mute function.
Default
Default
0: Normal operation. ATTM3-0 bits control attenuation value.
1: Mute. ATTM3-0 bits are ignored. (Default)
MMUTE
0
1
ATTR7
ATTL7
ATTL/R7-0
D7
D7
0
0
0
Table 20. MOUT Volume ATT values
Table 19. Digital Volume ATT values
FDH
FCH
FFH
FEH
02H
01H
00H
:
:
ATTR6
ATTL6
ATTM3-0
D6
D6
0DH
0
0
0
0FH
0EH
0CH
01H
00H
x
:
:
MUTE (−∞)
Attenuation
ATTR5
−126.5dB
−127.0dB
ATTL5
- 37 -
−0.5dB
−1.0dB
−1.5dB
D5
D5
0dB
0
0
0
:
:
Attenuation
MUTE
−28dB
−30dB
ATTL4
ATTR4
MMUTE
−2dB
−4dB
−6dB
0dB
D4
D4
:
:
0
1
Default
ATTL3
ATTR3
ATTM3
D3
D3
0
0
Default
ATTL2
ATTR2
ATTM2
D2
D2
0
0
ATTL1
ATTR1
ATTM1
D1
D1
0
0
[AK4569]
ATTL0
ATTR0
ATTM0
2005/07
D0
D0
0
0