ASAHI KASEI
[AK4367]
Addr Register Name
03H Mode Control 2
R/W
D7
0
RD
0
D6
0
RD
0
D5
0
RD
0
D4
0
RD
0
D3
ATS
R/W
0
D2
DATTC
R/W
0
D1
BCKP
R/W
0
D0
LRP
R/W
0
Default
LRP: LRCK Polarity Select
0: Normal (Default)
1: Invert
BCKP: BICK Polarity Select
0: Normal (Default)
1: Invert
DATTC: DAC Digital Attenuator Control Mode Select
0: Independent (Default)
1: Dependent
At DATTC bit = “1”, ATTL7-0 bits control both Lch and Rch attenuation level, while register values of
ATTL7-0 bits are not written to ATTR7-0 bits. At DATTC bit = “0”, ATTL7-0 bits control Lch level and
ATTR7-0 bits control Rch level.
ATS: Digital attenuator transition time setting (Table 5)
0: 1061/fs (Default)
1: 7424/fs
Addr Register Name
04H DAC Lch ATT
05H DAC Rch ATT
R/W
D7
D6
D5
D4
D3
D2
D1
D0
ATTL7 ATTL6 ATTL5 ATTL4 ATTL3 ATTL2 ATTL1 ATTL0
ATTR7 ATTR6 ATTR5 ATTR4 ATTR3 ATTR2 ATTR1 ATTR0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
Default
ATTL7-0: Setting of the attenuation value of output signal from DACL (Table 4)
ATTR7-0: Setting of the attenuation value of output signal from DACR (Table 4)
Default: “00H” (MUTE)
The AK4367 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.
MS0247-E-02
2005/10
- 32 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
