A R Ycification.change. N I e IM ct to l sp MITSUBISHI SOUND PROCESSOR IC's L ubje fina P R E his is noctliamits are s M65855FP 50 SERIES ; T metri ice Not e para som KARAOKE 1 Chip Digital Echo with Microphone mixing Amplifier DESCRIPTION The M65855FP is a CMOS IC built-in Digital Echo function with microphone mixing circuits for KARAOKE equipment packed in a single chip. It is suitable for KARAOKE equipments such as Video CD Player,Mini stereo,CD Radio cassette,TV or VCR. FEATURES Package Outline • Internal Input/Output low pass filter,A/D,D/A converters,microphone mixing amplifier,memory achieve a digital echo system with a single chip. • High performance digital echo circuit thanks to 20Kbit memory • Thanks to the improvement A/D,D/A converters,decrease the external output • Internal echo mute circuit and echo volume achieve a mixing level control • Built-in current control oscillation circuit for generating clocks • Delay time =164msec (Min.15ms to max. 200 ms can be set) • Small 16-Pin Flat package (16P2N) • Built-in automatic reset circuit with power turned on • 5V single power supply Outline 16P2N RECOMMENDED OPERATING CONDITIONS Supply voltage range•••••••••••••••Vcc=3.5~5.5V Rated supply voltage•••••••••••••••Vcc=5V SYSTEM CONFIGURATION RAM L HPF VOCAL CUT LPF MIC1 BASS MIX L MIX BASS MIX R KEY CONTROL HPF R MIX MIC VOL MIC AMP MIC2 MIX MIC VOL MIX ECHO ECHO VOL MIC AMP M65855FP MITSUBISHI ELECTRIC ( 1 / 10 ) A R Ycification.change. N I e IM ct to l sp MITSUBISHI SOUND PROCESSOR IC's L ubje fina P R E his is noctliamits are s M65855FP 50 SERIES ; T metri ice Not e para som KARAOKE PIN CONFIGURATION 1 16 CLOCK ECHOVOL 2 15 ECHOMUTE REF 3 OP2 IN 4 OP2 OUT 5 LPF2 IN 6 LPF2 OUT 7 M65855FP GND 14 VCC 13 OP1 IN 12 OP1 OUT 11 LPF1 OUT 10 LPF1 IN MIC OUT 8 9 MIC IN MITSUBISHI ELECTRIC ( 2 / 10 ) A R Ycification.change. N I e IM ct to l sp MITSUBISHI SOUND PROCESSOR IC's L ubje fina P R E his is noctliamits are s M65855FP 50 SERIES ; T metri ice Not e para som KARAOKE IC INTERNAL BLOCK DIAGRAM CLOCK ECHOMUTE ECHOVOL MIC OUT REF 3 16 15 OSCILLATOR 2 VOL 4 5 D/A 6 7 8 LPF2 MIX 1/2 Vcc CLOCK DO1 AUTO RESET MO RESET MAIN CONTROL MI D1 DO0 20Kbit SRAM A/D LPF1 10 11 12 13 1 14 9 GND VCC MIC IN MITSUBISHI ELECTRIC ( 3 / 10 ) A R Ycification.change. N I e IM ct to l sp MITSUBISHI SOUND PROCESSOR IC's L ubje fina P R E his is noctliamits are s M65855FP 50 SERIES ; T metri ice Not e para som KARAOKE PIN DESCRIPTION Pin No. Symbol 1 GND 2 ECHOVOL Name I/O Function GND - Echo Volume control I Echo level control with external DC voltage (from 0 to -10,-∞ 8 steps) Reference - To connect 1/2 Vcc output and filter capacitor Opeamp 2 input I 3 REF 4 OP2 IN 5 OP2 OUT Opeamp 2 output 6 LPF2 IN Low pass filter 2 input I 7 LPF2 OUT Low pass filter 2 output O 8 MIC OUT Microphone mixing output O 9 MIC IN Microphone input I 10 LPF1 IN Low pass filter 1 input I 11 LPF1 OUT Low pass filter 1 output O 12 OP1 OUT 13 Uses external C to form an D/A conversion integrator O Uses external CR to form a low pass filter at the input side Mixing output echo output and microphone Microphone input Uses external CR to form a low pass filter at the input side Opeamp 1 output O OP1 IN Opeamp 1 input I 14 VCC Power Supply - Applies a voltage of 3.5V to 5.5V(Rated5V) 15 ECHOMUTE Echo mute control I Echo mute control and clock stop control with external DC voltage 16 CLOCK Clock control I Controls a built-in clock generation circuit with external R MITSUBISHI ELECTRIC Uses external C to form an A/D conversion integrator ( 4 / 10 ) A R Ycification.change. N I e IM ct to l sp MITSUBISHI SOUND PROCESSOR IC's L ubje fina P R E his is noctliamits are s M65855FP 50 SERIES ; T metri ice Not e para som KARAOKE ABSOLUTE MAXIMUM RATINGS (Ta=25°C,unless otherwise noted) Test conditions Symbol Parameter Vcc Supply voltage Icc Circuit current Pd Power dissipation Topr Operating temperature Tstg Storage temperature Ratings Unit 6.0 100 0.8 -20~75 -40~125 V mA W °C °C RECOMMENDED OPERATING CONDITIONS Symbol Vcc ViL ViR ViH Parameter Supply voltage Test conditions Min. 3.5 0.0 "L" input voltage "Ref" input voltage Limits Typ. 5 Max. 5.5 1.0 Unit V V V 1/2Vcc-0.5 1/2 Vcc 1/2Vcc+0.5 Vcc-1 "H"input voltage MITSUBISHI ELECTRIC Vcc ( V 5 / 10 ) A R Ycification.change. N I e IM ct to l sp MITSUBISHI SOUND PROCESSOR IC's L ubje fina P R E his is noctliamits are s M65855FP 50 SERIES ; T metri ice Not e para som KARAOKE ELECTRICAL CHARACTERISTICS (Vcc=5V,f=1kHz,Vi=100mV(rms),fck=1MHz,Ta=25°C,unless otherwise noted) Limits TOTAL Symbol Icc Gv Parameter Test conditions Circuit current When signal is not provided Voltage gain between input and output RL=47kΩ ECHO Vomax Maximum output voltage THD=10% THD No fck td MIC Gv No Typ. Max. Unit 25 50 mA -6.5 -3.5 -0.5 dB 0.9 1.2 10 V(rms) Output distortion 30kHz LPF 1.2 3.0 % Output noise voltage JIS-A -80 -60 dBV Clock frequency Rc=120kΩ Delay time Voltage gain between input and output Rc=120kΩ RL=47kΩ Vomax Maximum output voltage THD=10% THD Min. 1 MHz 164 ms -3.0 0 1.1 1.7 dB 3.0 V(rms) Output distortion 30kHz LPF 0.05 0.10 Output noise voltage JIS-A,ECHO=Mute -90 MITSUBISHI ELECTRIC dBV -80 ( 6 % / 10 ) A R Ycification.change. N I e IM ct to l sp MITSUBISHI SOUND PROCESSOR IC's L ubje fina P R E his is noctliamits are s M65855FP 50 SERIES ; T metri ice Not e para som KARAOKE FUNCTION DESCRIPTION (1) Clock oscillator circuit The M65855FP incorporates a current control type clock oscillator circuit in it, thus providing circuit configuration just by connecting a resistor for current control to pin 16 CLOCK. Fully internal clock supply prevents occurrence of undesired radiation without affecting any external circuit When Rc=120kΩ fck=1MHz Rc 16 Clock oscillator circuit clock frequency fck (2) Delay time Td The delay time can be calculated by the equation; Td=N/fs (N=The number of memory bits=20480) when fck=1MHz,Td can be set at 164ms. <<Reference>>The M65855FP adopts ADM (adaptive Delta Modulation) system in A/D,D/A converters. The sampling frequency can be calculated by the following equation; fs=clock frequency /8(Hz) For clock frequency fck=1MHz, the calculated sampling frequency is ; fs=1MHz/8=125kHz (3) Mute 1) When power is on When power is turned on, the mute function works automatically to prevent noise generation. (Here,however,"mute" means the function which prevents noise generation after the reset time.) Power on time Reset period internal mode setting time Mute time (about 260msec) Mute off time (a)When power is on ( fck=1MHz) MITSUBISHI ELECTRIC ( 7 / 10 ) A R Ycification.change. N I e IM ct to l sp MITSUBISHI SOUND PROCESSOR IC's L ubje fina P R E his is noctliamits are s M65855FP 50 SERIES ; T metri ice Not e para som KARAOKE 2) When mute signal input Delay output can be set the mute control from 15 pin supply voltage. (Please refer the following) Mode 15 pin supply voltage H(≥Vcc-1V) Normal mode Ref(1/2 Vcc±0.5V) Mute mode (clock stop +Microphone output mute) Mute(clock stop) L(≤1.0V) When the setting change from mute to normal mode,it also mute function work same time as 1) setting. L-H change time Mute time mute off 260msec)time internal mode (about setting time (b)Mute L R-H change time H change setting (fck=1MHz) Mute time mute off (about 260msec)time (c)Mute R H change setting (fck=1MHz) MITSUBISHI ELECTRIC ( 8 / 10 ) A R Ycification.change. N I e IM ct to l sp MITSUBISHI SOUND PROCESSOR IC's L ubje fina P R E his is noctliamits are s M65855FP 50 SERIES ; T metri ice Not e para som KARAOKE (4) Input/Output LPF It is necessary to change the LPF setting (signal pass band;fsig)of digital echo according to the clock frequency. A/D LPF fsig= REF 2π Gv= 20log 10 R1 R2 R1 When,R1=20K,R2=8.2K,R3=10K,C1=0.012µF, C2=4700pF, cut off frequency and voltage gain is following. 11 C2 R2 1 C1•C2•R2•R3 fsig= 2.3KHz Gv= -6dB R3 C1 The recommend voltage gain and the A/D ,D/A LPF signal pass band, please refer to the table below. ( Delay time 164msec (When Master clock 1MHz)) A/D LPF D/A LPF Signal pass band Gain Signal pass band Gain 3KHz -6dB 3KHz +3dB MITSUBISHI ELECTRIC ( 9 / 10 ) A R Ycification.change. N I e IM ct to l sp MITSUBISHI SOUND PROCESSOR IC's L ubje fina P R E his is noctliamits are s M65855FP 50 SERIES ; T metri ice Not e para som KARAOKE APPLICATION EXAMPLE 24k 0.012µ MIC IN + Vcc 10k Echo Mute 100µ 20k 1µ 8.2k 120K 8 ECHO OUT ECHO IN 9 LPF1 IN 10 LPF1 OUT 11 6 LPF2 IN 7 LPF2 OUT OP1 OUT 12 4700p 5 OP2 OUT OP1 IN 13 4 OP2 IN VCC 14 3 REF 15 ECHO MUTE 2 ECHOVOL 1 GND CLOCK 16 0.01µ 0.1É 3300p ECHO Volume 22µ 0.01µ Non 1.0µ 4.7k 2.2µ MIC OUT 10k 15k 0.01µ Unit Resistance:Ω Capacitor:F MITSUBISHI ELECTRIC ( 10 / 10 )