AK4705 Datasheet, PDF (23/50 Pages) Asahi Kasei Microsystems – 2ch 24bit DAC with AV SCART Switch

[AK4705]
■ 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
44.1kHz
0
1
OFF
1
0
48kHz
1
1
32kHz
Table 5. De-emphasis filter control
(default)
■ Switch Control
The AK4705 has switch matrixes designed primarily for SCART routing. Those are controlled via the control register as
shown in Table 6, Table 7 and Table 8 (refer to the block diagram).
(01H: D1-D0)
TV1 TV0
Source of TVOUTL/R
0
0
DAC
0
1
VCRIN
(default)
1
0
Mute
1
1
(Reserved)
Table 6. TVOUT Switch Configuration
(01H: D2-D0)
VOL TV1 TV0
Source of MONOOUT
0
0
0
0
0
1
0
1
0
0
1
1
DAC (L+R)/2
DAC (L+R)/2
DAC (L+R)/2
(Reserved)
Bypass the
volume #1
1
0
0
DAC (L+R)/2
Through the
1
0
1
VCRIN (L+R)/2 (default) ^{volume #1}
1
1
0
Mute
1
1
1
(Reserved)
Table 7. MONOOUT Switch Configuration
(01H: D5-D4)
VCR1 VCR0
Source of VCROUTL/R
0
0
DAC
0
1
TVIN
1
0
Mute
1
1
Output of volume #1
Table 8. VCROUT Switch Configuration
(default)
MS0451-E-01
- 23 -
2007/06