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| ; T metri ice Not e para som L ubje fina P R E his is notlia its are s cm . RY n. I N A l specificattioo change t IM c MITSUBISHI SOUND PROCESSOR IC's M65855FP 50 SERIES 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 * 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 Package Outline Outline 16P2N RECOMMENDED OPERATING CONDITIONS Supply voltage range***************Vcc=3.5~5.5V Rated supply voltage***************Vcc=5V 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 MIC VOL MIC AMP MIX ECHO M65855FP ECHO VOL MIC2 MITSUBISHI ELECTRIC ( 1 / 10 ) ; T metri ice Not e para som L ubje fina P R E his is notlia its are s cm . RY n. I N A l specificattioo change t IM c MITSUBISHI SOUND PROCESSOR IC's M65855FP 50 SERIES KARAOKE PIN CONFIGURATION GND ECHOVOL REF OP2 IN OP2 OUT LPF2 IN LPF2 OUT 1 2 16 CLOCK 15 ECHOMUTE M65855FP 3 4 5 6 7 14 VCC 13 OP1 IN 12 OP1 OUT 11 LPF1 OUT 10 LPF1 IN 9 MIC IN MIC OUT 8 MITSUBISHI ELECTRIC ( 2 / 10 ) ; T metri ice Not e para som L ubje fina P R E his is notlia its are s cm . RY n. I N A l specificattioo change t IM c MITSUBISHI SOUND PROCESSOR IC's M65855FP 50 SERIES KARAOKE IC INTERNAL BLOCK DIAGRAM CLOCK ECHOMUTE ECHOVOL MIC OUT REF 3 16 OSCILLATOR 15 2 VOL 4 5 6 LPF2 7 8 MIX D/A 1/2 Vcc CLOCK DO1 AUTO RESET MO RESET D1 MAIN CONTROL MI DO0 20Kbit SRAM A/D LPF1 10 11 12 13 1 GND 14 9 VCC MIC IN MITSUBISHI ELECTRIC ( 3 / 10 ) ; T metri ice Not e para som L ubje fina P R E his is notlia its are s cm . RY n. I N A l specificattioo change t IM c MITSUBISHI SOUND PROCESSOR IC's M65855FP 50 SERIES KARAOKE PIN DESCRIPTION Pin No. Symbol GND ECHOVOL REF OP2 IN OP2 OUT LPF2 IN LPF2 OUT MIC OUT MIC IN LPF1 IN LPF1 OUT OP1 OUT OP1 IN VCC ECHOMUTE CLOCK Name GND Echo Volume control I/O I I O I O O I I O O I I I Function 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Echo level control with external DC voltage (from 0 to -10,- 8 steps) To connect 1/2 Vcc output and filter capacitor Reference Opeamp 2 input Opeamp 2 output Low pass filter 2 input Low pass filter 2 output Microphone mixing output Microphone input Low pass filter 1 input Low pass filter 1 output Uses external C to form an D/A conversion integrator 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 Opeamp 1 input Uses external C to form an A/D conversion integrator Power Supply Echo mute control Applies a voltage of 3.5V to 5.5V(Rated5V) Echo mute control and clock stop control with external DC voltage Controls a built-in clock generation circuit with external R Clock control MITSUBISHI ELECTRIC (4 / 10 ) ; T metri ice Not e para som L ubje fina P R E his is notlia its are s cm . RY n. I N A l specificattioo change t IM c MITSUBISHI SOUND PROCESSOR IC's M65855FP 50 SERIES KARAOKE ABSOLUTE MAXIMUM RATINGS Symbol Vcc Parameter Supply voltage Circuit current Power dissipation Operating temperature Storage temperature (Ta=25C,unless otherwise noted) Ratings Unit V mA W C C Test conditions Icc Pd Topr Tstg 6.0 100 0.8 -20~75 -40~125 RECOMMENDED OPERATING CONDITIONS Symbol Vcc ViL ViR ViH Parameter Supply voltage "L" input voltage "Ref" input voltage "H"input voltage Test conditions Min. Limits Typ. Max. 3.5 0.0 Vcc-1 5 5.5 1.0 Vcc Unit V V V V 1/2Vcc-0.5 1/2 Vcc 1/2Vcc+0.5 MITSUBISHI ELECTRIC ( 5 / 10 ) ; T metri ice Not e para som L ubje fina P R E his is notlia its are s cm . RY n. I N A l specificattioo change t IM c MITSUBISHI SOUND PROCESSOR IC's M65855FP 50 SERIES KARAOKE ELECTRICAL CHARACTERISTICS (Vcc=5V,f=1kHz,Vi=100mV(rms),fck=1MHz,Ta=25C,unless otherwise noted) Limits Symbol TOTAL Parameter Test conditions Min. Typ. Max. Unit Icc Gv Circuit current When signal is not provided Voltage gain between input and output 10 -6.5 0.9 25 50 mA dB V(rms) RL=47k -3.5 -0.5 1.2 1.2 -80 1 164 3.0 -60 Vomax Maximum output voltage THD=10% ECHO THD No fck td Gv Output distortion 30kHz LPF Output noise voltage JIS-A % dBV MHz ms Clock frequency Rc=120k Delay time Voltage gain between input and output Rc=120k RL=47k -3.0 1.1 0 1.7 3.0 dB V(rms) % dBV MIC Vomax Maximum output voltage THD=10% THD No Output distortion 30kHz LPF Output noise voltage JIS-A,ECHO=Mute 0.05 0.10 -90 -80 MITSUBISHI ELECTRIC ( 6 / 10 ) ; T metri ice Not e para som L ubje fina P R E his is notlia its are s cm . RY n. I N A l specificattioo change t IM c MITSUBISHI SOUND PROCESSOR IC's M65855FP 50 SERIES 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=120k fck=1MHz Rc 16 Clock oscillator circuit (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. clock frequency fck < (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 ) ; T metri ice Not e para som L ubje fina P R E his is notlia its are s cm . RY n. I N A l specificattioo change t IM c MITSUBISHI SOUND PROCESSOR IC's M65855FP 50 SERIES KARAOKE 2) When mute signal input Delay output can be set the mute control from 15 pin supply voltage. (Please refer the following) 15 pin supply voltage H(Vcc-1V) Ref(1/2 Vcc0.5V) L(1.0V) Mode Normal mode Mute mode (clock stop +Microphone output mute) Mute(clock stop) When the setting change from mute to normal mode,it also mute function work same time as 1) setting. L-H change time internal mode (about setting time Mute time mute off 260msec)time H change setting (fck=1MHz) (b)Mute L R-H change time Mute time mute off (about 260msec)time H change setting (fck=1MHz) (c)Mute R MITSUBISHI ELECTRIC ( 8 / 10 ) ; T metri ice Not e para som L ubje fina P R E his is notlia its are s cm . RY n. I N A l specificattioo change t IM c MITSUBISHI SOUND PROCESSOR IC's M65855FP 50 SERIES 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 REF fsig= 2 1 C1*C2*R2*R3 R2 R1 Gv= 20log 10 C2 11 When,R1=20K,R2=8.2K,R3=10K,C1=0.012F, C2=4700pF, cut off frequency and voltage gain is following. fsig= 2.3KHz Gv= -6dB R2 R1 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 Signal pass band 3KHz Gain -6dB D/A LPF Signal pass band 3KHz Gain +3dB MITSUBISHI ELECTRIC ( 9 / 10 ) ; T metri ice Not e para som L ubje fina P R E his is notlia its are s cm . RY n. I N A l specificattioo change t IM c MITSUBISHI SOUND PROCESSOR IC's M65855FP 50 SERIES KARAOKE APPLICATION EXAMPLE 24k 0.012 Vcc Echo Mute 120K 0.01 4700p 10k 100 20k 8.2k MIC IN + 1 LPF1 OUT 11 OP1 OUT 12 LPF1 IN 10 CLOCK 16 VCC 14 OP1 IN 13 15 0.1E 3300p ECHO Volume 22 0.01 Non 1.0 10k 0.01 4.7k 2.2 MIC OUT 15k MITSUBISHI ELECTRIC 8 ECHO OUT ECHO IN 9 Unit Resistance: Capacitor:F ( 10 / ECHO MUTE 2 ECHOVOL 6 LPF2 IN 4 OP2 IN 7 LPF2 OUT 5 OP2 OUT 1 GND 3 REF 10 ) |
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