[AK4706]
■ De-emphasis filter (00H: D7-D6)
A digital de-emphasis filter is available for 32, 44.1 or 48kHz sampling rates (tc = 50/15µs) and is controlled by the
DEM0 and DEM1 bits.
DEM1
DEM0
Mode
0
0
1
1
0
1
0
1
44.1kHz
OFF
(default)
48kHz
32kHz
Table 6. De-emphasis filter control
■ Switch Control
The AK4706 has switch matrixes designed primarily for SCART routing. Those are controlled via the control register as
shown in Table 7, Table 8 and Table 9 (refer to the block diagram).
(01H: D1-D0)
TV1
TV0
Source of TVOUTL/R
DAC
0
0
1
1
0
1
0
1
VCRIN (default)
Mute
(Reserved)
Table 7. TVOUT Switch Configuration
(01H: D2-D0)
VOL
TV1
TV0
0
1
0
1
0
1
0
1
Source of MONOOUT
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
DAC (L+R)/2
DAC (L+R)/2
DAC (L+R)/2
Bypass the
volume #1
(Reserved)
DAC (L+R)/2
VCRIN (L+R)/2
Through the
volume #1
Mute
(Reserved)
Table 8. MONOOUT Switch Configuration
(01H: D5-D4)
VCR1
VCR0
Source of VCROUTL/R
DAC
TVIN (default)
Mute
Output of volume #1
0
0
1
1
0
1
0
1
Table 9. VCROUT Switch Configuration
MS0507-E-01
2010/09
- 26 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
