AK4366_04 Datasheet, PDF (26/31 Pages) Asahi Kasei Microsystems – Low Power 24-Bit 2ch DAC with HP-AMP

ASAHI KASEI
[AK4366]
Addr Register Name
03H Mode Control 2
Default
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
ATS DATTC BCKP LRP
0
0
0
0
0
0
0
0
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 6)
0: 1061/fs (Default)
1: 7424/fs
Addr
04H
05H
Register Name
DAC Lch ATT
DAC Rch ATT
Default
D7
ATTL7
ATTR7
0
D6
ATTL6
ATTR6
0
D5
ATTL5
ATTR5
0
D4
ATTL4
ATTR4
0
D3
ATTL3
ATTR3
0
D2
ATTL2
ATTR2
0
D1
ATTL1
ATTR1
0
D0
ATTL0
ATTR0
0
ATTL7-0: Setting of the attenuation value of output signal from DACL (Table 5)
ATTR7-0: Setting of the attenuation value of output signal from DACR (Table 5)
Default: “00H” (MUTE)
The AK4366 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.
Addr Register Name
06H Output Select
Default
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
DACR DACL
0
0
0
0
0
0
0
0
DACL: DAC Lch output signal is output to Lch of headphone amp.
0: OFF (Default)
1: ON
DACR: DAC Rch output signal is output to Rch of headphone amp.
0: OFF (Default)
1: ON
MS0248-E-01
- 26 -
2004/03