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.)
Output Level
(at volume#1=0dB)
DVOL1
DVOL0
Gain
0
0
1
1
0
1
0
1
0dB
-6dB
2Vrms
1Vrms
2.44dB
(Reserved)
2.65Vrms
(Reserved)
Table 4. Volume #0 (Digital Volume for DAC)
L5
1
L4
0
L3
0
L2
0
L1
1
L0
0
Gain
+6dB
1
0
0
0
0
1
+4dB
1
0
0
0
0
0
+2dB
0
…
0
1
…
0
1
…
0
1
…
0
1
…
0
1
…
1
0dB (default)
…
-60dB
Mute
0
0
0
0
0
0
Note: Do not exceed 3Vrms as analog output.
Table 5. Volume #1 (Analog Volume)
TV1
TV0
Source of TVOUTL/R
DAC
0
0
1
1
0
1
0
1
VCRIN (default)
Mute
(Reserved)
Table 6. TVOUT Switch Configuration
VOL
TV1
0
0
1
1
0
0
1
1
TV0
0
1
0
1
0
1
0
1
Source of MONOOUT
0
0
0
0
1
1
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 7. MONOOUT Switch Configuration
VCR1
VCR0
Source of VCROUTL/R
DAC
0
0
1
1
0
1
0
1
TVIN (default)
Mute
(Reserved)
Table 8. VCROUT Switch Configuration
MS0424-E-00
2005/09
- 18 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
