AK4584_01 Datasheet, PDF (42/53 Pages) Asahi Kasei Microsystems – 24Bit 96kHz Audio CODEC with DIT/DIR

ASAHI KASEI
[AK4584]
Addr
06H
07H
Register Name
Lch OATT Control
Rch OATT Control
R/W
Default
D7
ATTL7
ATTR7
R/W
1
D6
ATTL6
ATTR6
R/W
1
D5
ATTL5
ATTR5
R/W
1
D4
ATTL4
ATTR4
R/W
1
D3
ATTL3
ATTR3
R/W
1
D2
ATTL2
ATTR2
R/W
1
D1
ATTL1
ATTR1
R/W
1
D0
ATTL0
ATTR0
R/W
1
ATTL/R7-0: DAC OATT Level (see Table 24)
Initial value is “FFH” (0dB).
The transition from initial to final levels has 7425 levels. It takes 7424/fs (168ms@fs=44.1kHz)
from FFH(0dB) to 00H(MUTE). If PDN pin goes to “L”, the ATTs are initialized to FFH.
The ATTs are FFH when PWDAN bit = “0”. When PWDAN bit returns to “1”, the ATTs fade to their current
value.
The ATTs are FFH when RSTDAN bit = “0”. When RSTDAN bit returns to “1”, the ATTs fade to their current
value.
Digital attenuation is independent of the soft mute function.
ATTL/R7-0
Attenuation
FFH
0dB
FEH
−0.5dB
FDH
−1.0dB
FCH
−1.5dB
:
:
:
:
02H
−126.5dB
01H
−127dB
00H
MUTE (−∞)
Table 24. OATT Code Table
MS0118-E-00
- 42 -
2001/11