M65845AFP
Input impedance to pin 35 is so high (1 MΩ) that ALC base voltage can be determined by division resistance.
V
CC
R17 (51 kΩ)
35
R16
C33 (0.01
μF)
at V
CC
= 5 V
ALC Operation Voltage (dBV)
+3
0
–2
–4
–6
–8
–10
Pin 35 Control Voltage VALC (V)
0.50
1.09
1.38
1.61
1.79
1.94
2.05
Resistance R16 (Ω)
5.6 k
15 k
20 k
24 k
27 k
33 k
36 k
MIC SW
Input low level to pin 31 (MIC SW), then microphone and echo signal can be cut.
Pin 31 (MIC SW)
H or Open
L
MIC SW
On
Off
Echo Signal Output
On
Mute
Audio Source Select
Changing the switch, sound source changes four patterns matching with Karaoke soft.
Pin 33 AUDSW1: D1
L
L
H
H
Pin 34 AUDSW2: D2
L
H
L
H
Movements
Stereo
Lch monaural
Rch monaural
Vocal cut
1. Stereo
Under the conditions usual 2ch are played back to each outputs.
2. Lch monaural
Under the conditions Lch source is played back to 2ch outputs and suitable for Karaoke reproduction of multiple
Karaoke soft and main sound reproduction of laser disks.
3. Rch monaural
Under the conditions Rch source is played back to 2ch outputs and suitable for reference vocal reproduction of
multiple Karaoke soft and sub sound reproduction of laser disks.
REJ03F0170-0201 Rev.2.01 Jan 25, 2008
Page 8 of 13
RENESAS [ RENESAS TECHNOLOGY CORP ]
