AK4707 Datasheet, PDF (19/42 Pages) Asahi Kasei Microsystems – AV SCART Switch

ASAHI KASEI
[AK4707]
2. Audio Block
„ Switch Control
The AK4707 has switch matrixes designed primarily for SCART routing. Those are controlled via the control register as
shown in, Table 3 and Table 4 (Please refer to the Block Diagram).
(01H: D1-D0)
TV1 TV0
Source of TVOUTL/R
0
0
AMP
0
1
VCRIN (default)
1
0
Mute
1
1
(Reserved)
Table 3. TVOUT Switch Configuration
(01H: D5-D4)
VCR1 VCR0
Source of VCROUTL/R
0
0
AMP
0
1
TVIN (default)
1
0
Mute
1
1
(Reserved)
Table 4. VCROUT Switch Configuration
„ Volume Control #0 (7-Level Volume)
The AK4707 has a 7-level volume control (Volume #0) as shown in Table 5. The volume reflects the change of register
value immediately.
2Vrms differential
input
1Vrms AINL/R+
0.47µ
1Vrms
0.47µ
AINL/R-
Volume Gain 0dB
Volume #0
2Vrms
TVOUTL/R
(VCROUTL/R)
Figure 4. Volume #0(Volume Gain=0dB:default), Full Differential Stereo Input
(02H: D5-D3)
L2
L1
1
1
1
1
1
0
1
0
0
1
0
1
0
0
0
0
L0
Volume #0 Gain
Output Level (Typ)
1
+12dB
2Vrms (with 0.5Vrms differential input)
0
+9dB
-
1
+6dB
2Vrms (with 1Vrms differential input)
0
+3dB
-
1
0dB
2Vrms (with 2Vrms differential input: default)
0
-3dB
-
1
-6dB
1Vrms (with 2Vrms differential input)
0
Mute
-
Table 5. Volume #0, Full Differential Stereo Input
MS0551-E-00
- 19 -
2006/10