AK4702EQ Datasheet, PDF (18/39 Pages) Asahi Kasei Microsystems – 2ch DAC with AV SCART switch

ASAHI KASEI
[AK4702EQ]
„ Volume/Switch Control
The AK4702 has analog volume controls and switch matrixes designed primarily for SCART routing. Those are
controlled via the control register as shown in, Table 4, Table 5, Table 7 and Table 8. (Please refer to the block diagram in
figure 1.)
DVOL1
0
0
1
1
DVOL0
0
1
0
1
Gain
0dB
-6dB
2.44dB
(Reserved)
Output Level
(at volume#1=0dB)
2Vrms
1Vrms
2.65Vrms
(Reserved)
Table 4. Volume #0 (Digital Volume for DAC)
L5
L4
L3
L2
L1
L0
1
0
0
0
1
0
1
0
0
0
0
1
1
0
0
0
0
0
0
1
1
1
1
1
…
…
…
…
…
…
0
0
0
0
0
1
0
0
0
0
0
0
Note: Do not exceed 3Vrms as analog output.
Table 5. Volume #1 (Analog Volume)
Gain
+6dB
+4dB
+2dB
0dB (default)
…
-60dB
Mute
TV1 TV0
0
0
0
1
1
0
1
1
Source of TVOUTL/R
DAC
VCRIN (default)
Mute
(Reserved)
Table 6. TVOUT Switch Configuration
VOL TV1 TV0
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
Source of MONOOUT
DAC (L+R)/2
DAC (L+R)/2
DAC (L+R)/2
Bypass the
volume #1
(Reserved)
DAC (L+R)/2
Through the
VCRIN (L+R)/2
volume #1
Mute
(Reserved)
Table 7. MONOOUT Switch Configuration
VCR1
0
0
1
1
VCR0
0
1
0
1
Source of VCROUTL/R
DAC
TVIN (default)
Mute
(Reserved)
Table 8. VCROUT Switch Configuration
MS0424-E-00
- 18 -
2005/09