m65845afp Renesas Electronics Corporation., m65845afp Datasheet - Page 8

• Manufacturer Part Number: m65845afp
• Description: Digital Echo With Microphone Mixing Circuit
• Manufacturer: Renesas Electronics Corporation.

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