M65845FP 데이터 시트보기 (PDF) - Renesas Electronics

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M65845FP

Digital Echo with Microphone Mixing Circuit

Renesas Electronics 

M65845AFP

Input impedance to pin 35 is so high (1 MΩ) that ALC base voltage can be determined by division resistance.

VCC

R17 (51 kΩ)

35

R16

C33 (0.01 μF)

at VCC = 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

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