ASAHI KASEI
[AK4644]
Addr Register Name
09H Lch Input Volume Control
0CH Rch Input Volume Control
Default
D7
IVL7
IVR7
1
D6
IVL6
IVR6
1
D5
IVL5
IVR5
1
D4
IVL4
IVR4
0
D3
IVL3
IVR3
0
D2
IVL2
IVR2
0
D1
IVL1
IVR1
0
D0
IVL0
IVR0
1
IVL7-0, IVR7-0: Input Digital Volume; 0.375dB step, 242 Level (See Table 36.)
Default: “E1H” (+30.0dB)
Addr Register Name
D7
DVL7
DVR7
0
D6
DVL6
DVR6
0
D5
DVL5
DVR5
0
D4
DVL4
DVR4
1
D3
DVL3
DVR3
1
D2
DVL2
DVR2
0
D1
DVL1
DVR1
0
D0
DVL0
DVR0
0
0AH Lch Digital Volume Control
0DH Rch Digital Volume Control
Default
DVL7-0, DVR7-0: Output Digital Volume (See Table 39.)
Default: “18H” (0dB)
Addr Register Name
0BH ALC Mode Control 3
Default
D7
RGAIN1
0
D6
LMTH1
0
D5
0
0
D4
0
0
D3
0
0
D2
0
0
D1
VBAT
0
D0
0
0
VBAT: HP-Amp Common Voltage (See Table 53.)
0: 0.5 x HVDD (Default)
1: 0.64 x AVDD
LMTH1: ALC Limiter Detection Level / Recovery Counter Reset Level (See Table 28.)
RGAIN1: ALC Recovery GAIN Step (See Table 32.)
Addr Register Name
0EH Mode Control 3
Default
D7
0
0
D6
LOOP
0
D5
D4
D3
BST1
0
D2
BST0
0
D1
DEM1
0
D0
DEM0
1
SMUTE DVOLC
0
1
DEM1-0: De-emphasis Frequency Select (See Table 37)
Default: “01” (OFF)
BST1-0: Bass Boost Function Select (See Table 38)
Default: “00” (OFF)
DVOLC: Output Digital Volume Control Mode Select
0: Independent
1: Dependent (Default)
When DVOLC bit = “1”, DVL7-0 bits control both Lch and Rch volume level, while register values of
DVL7-0 bits are not written to DVR7-0 bits. When DVOLC bit = “0”, DVL7-0 bits control Lch level and
DVR7-0 bits control Rch level, respectively.
SMUTE: Soft Mute Control
0: Normal Operation (Default)
1: DAC outputs soft-muted
LOOP: Digital Loopback Mode
0: SDTI → DAC (Default)
1: SDTO → DAC
MS0477-E-01
2006/10
- 72 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
