M65850P/FP
Digital Echo (Digital Delay)
REJ03F0171-0201
Rev.2.01
Jan 25, 2008
Description
The M65850P/FP is a CMOS IC for generating echo to be added to the voice through a Karaoke microphone.
It is optimal to provide the echo effect function for Karaoke player, such as radio cassette recorders, mini audio
components and television sets.
Increased master clock frequency assures high-performance short delay, enabling the IC to be used for Dolby prologic
surround system.
Features
•
Built-in input/output filters, A/D and D/A converters, and memory realize a delay system with only a single chip.
•
Built-in current control type clock oscillator circuit avoids clock affection outside, thus allowing prevention of
undesired radiation.
•
Delay time = 164 ms (with master clock set at 1 MHz)
(Selection of delay time in a range between 15 ms and 200 ms)
•
Small package (14-pin DIP: PRDP0014AA-A (14P4), 16-pin SOP: PRSP0016DE-A (16P2N-A))
•
Built-in 20 Kbit SRAM
•
Built-in auto reset circuit (The IC reset as power is turned on)
•
Single power supply (5 V)
Recommended Operating Condition
•
Supply voltage range: V
CC
= 3.5 to 5.5 V
•
Rated supply voltage: V
CC
= 5 V
System Configuration
RAM
L
Vocal
cut
R
HPF
LPF
HPF
Key control
MIX
BASS
MIX
R
MIX
BASS
MIX
L
MIC1
MIC AMP
MIC VOL
MIX
MIX
Echo
M65850P/FP
Echo VOL
MIC2
MIC AMP
MIC VOL
Note: Dolby is the registered trademarks of Dolby Laboratories Licensing Corporation.
REJ03F0171-0201 Rev.2.01 Jan 25, 2008
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