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electric mitsubishi M65856SP mitsubishi sound processor ics digital echo with microphone mixing circuit high performance digital echo circuit thanks to 16kbit memory built-in surround function which works simulated stereo for monaural source and stereo surround for stereo source alc-equipped microphone amplifiers permit excessively high input. alc operating voltage can be set as desired. 2 microphone volumes, echo effect volume and echo feedback volume are included stereo microphone-line mixing amplifiers karaoke entertainment functions such as vocal cut and automatic vocal support system built-in interface terminal for external keycontrol ic built-in current-control oscillation circuit built-in automatic reset circuit activated with power on 5v single power supply the m65856 is a cmos ic built-in digital echo function with microphone peripheral 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, tvor vcr. supply voltage range ????????vcc = 4.5 ~ 5.5v rated supply voltage ?????????????vcc = 5v description features recommended operating condition pin configuration 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 gnd mic1nfin alc1 mic1out valc mic1volin mic2in mic2nfin mic2out mic2volin micout adintin adintout mic sw alc2 vcc dacont lpf1in1 lpf2in1 lpf2out rout ps2 ps1 latch mic1in lpf1in2 26 25 24 lpf1out 23 22 ref adcont 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 daintin lpf2in2 daintout lout rin sourceout keyconin clock data lin vcfil mclkcont vol in system configuration lch output rch output lch input mic2 mix alc mix phase shifter surround echo vol echo vocal cut source selector (l+r)/2 l r alc mix mic1 mic vol mic vol feedback vol rch input key control ic m65847fp mix
electric mitsubishi M65856SP mitsubishi sound processor ics digital echo with microphone mixing circuit pin configuration gnd 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 17 mclk lpf a/d d/a lpf main logic 16kbit sram 1/2vcc echo vol echo f.bvol ?com i/f mic sw 16 18 19 20 21 42 41 40 39 38 37 36 35 34 33 32 31 30 29 27 28 26 25 24 22 alc alc mic vol mic vol (l+r) / 2 l r stereo phase shifter surround vcc 23
electric mitsubishi M65856SP mitsubishi sound processor ics digital echo with microphone mixing circuit pin description pin no. symbol name i/o function 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 alc1 mic1nfin mic1volin mic2in alc2 mic2out mic2volin to connect alc2 attack/recovery time setting capacitor i i mixing output of mic1 and mic2 lpf1in2 micout i i mic1out to connect mic2 mic2nfin i i i lpf1in1 i lpf1out o adintout adintin adcont ref composes d/a conversion integrator with external capacitor valc mic1in i to connect alc1 attack / recovery time setting capacitor to connect low cut-off frequency of mic1 amplifier setting capacitor 21 to set alc operating voltage according to applied voltage to connect mic1 to determine adaptive time constant of a/d convertor with adm system to connect 1/2 vcc output and filter capacitor microphone 1 volume input microphone 2 input alc2 control alc1 control microphone 2 negative feedback input microphone output low pass filter 1 output a/d integrator output reference power output alc operating voltage setting terminal microphone 1 input microphone 1 negative feedback input microphone 1 output a/d control microphone 2 volume input microphone 2 input a/d integrator input low pass filter 1 input 2 low pass filter 1 input 1 pre-filter before a/d convertor for digital delay o o i o to connect capacitor to reduce noise generated at time of volume change to connect capacitor to reduce noise generated at time of volume change mclkcont clock control controls built-in clock generation circuit with external r to connect low cut-off frequency of mic2 amplifier setting capacitor mic sw i l: mic off h: mic on microphone sw
electric mitsubishi M65856SP mitsubishi sound processor ics digital echo with microphone mixing circuit pin no. symbol name i/o function daintin daintout lpf2in2 lpf2out keyconin vcfil rout i i lout ps1 lpf2in1 sourceout ps2 i latch clock data vcc dacont 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 rch output phase shift input 1 vocal cut filter rch mixing output lch output lch mixing output phase shift input 2 determines a constant at time of phase shift monaural input for external keycontrol ic input/output interface terminal for external keycontrol ic processes frequencies lower than the vocal band power supply low pass filter 2 input 2 low pass filter 2 input 1 d/a control d/a integrator input d/a integrator output composes d/a conversion integrator with external capacitor latch clock data latch input via serial bus clock input via serial bus data input via serial bus low pass filter 2 output to determine adaptive time constant of d/a convertor with adm system post-filter after d/a convertor for digital delay i o o i i i i i o o rin lin i rch line input lch line input rch line input lch line input i volin echo effect / echo feed back volume input to connect capacitor to reduce noise generated at time of volume change i gnd ground monaural output for external keycontrol ic o
electric mitsubishi M65856SP mitsubishi sound processor ics digital echo with microphone mixing circuit electrical characteristics icc no zi symbol parameter test conditions limits unit circuit current maximum output voltage output noise voltage input impedance ma db dbv vrms min typ max no signal provided thd=10% 10 (vcc=5v,f=1khz,vi=100mvrms,ta=25? unless otherwise noted) gvo amplifier gain 47 thd1 0.5 3.0 -72 voalc talcat msec gv i/o voltage gain volume max db volume min alc operating voltage measurement error measurement : -10 to +3dbv c=4.7? 40 alc attack time vo = -17dbv distortion vo = -17dbv,with alc not operated % % thd2 distortion vi= -37dbv,with alc operated 0 db talcre alc recovery time c=4.7? 1.5 sec vomax gv=47db,f=100 to 5khz -68 1.4 k w 0 attmax maximum attenuation thd distortion volume max thd=10% 0.15 vrms 1.7 dbv % 40 20 1.5 6.0 -67 55 +3 2.0 -57 +3 0.30 5 25 -3 1.0 1.3 -3 1.4 output noise voltage jis - a no -96 dbv -90 maximum input voltage vimax -72 gv i/o voltage gain volume max db volume min 0 attmax maximum attenuation thd distortion volume max thd=10% 0.15 vrms 1.1 dbv % -67 +3 0.30 -3 1.4 output noise voltage jis - a no -96 dbv -90 maximum output voltage vomax 88 44 50
electric mitsubishi M65856SP mitsubishi sound processor ics digital echo with microphone mixing circuit no symbol parameter test conditions limits unit output noise voltage dbv min typ max td delay time 88.4 156.0 208.1 thd vi=0mvrms,jis - a td=104.0msec,rg=620 w -87 distortion 138.7 msec msec msec msec -85 -85 -82 dbv dbv dbv td=104.0ms,30khzlpf td=138.7ms,30khzlpf td=156.0ms,30khzlpf td=208.1ms,30khzlpf vi=0mvrms,jis - a td=138.7msec,rg=620 w vi=0mvrms,jis - a td=156.0msec,rg=620 w vi=0mvrms,jis - a td=208.1msec,rg=620 w 1.0 1.5 1.5 2.0 % % % % gv i/o voltage gain db 0 thd distortion maximum output voltage output noise voltage thd=10% vomax jis - a,mic sw off no 0.02 vrms 1.7 % -95 dbv zi input impedance 20 k w 30khzlpf channel separation lin=1khz,vi=1vrms,rout jis - a cs -70 db vocal removal ratio vocal cut grej 18 db sets delay time with microcomputer. -72 -70 -70 -67 -3 1.1 -90 13 14 2.0 3.0 3.0 4.0 +3 0.04 32 gv i/o voltage gain db 0 maximum output voltage thd=10% vomax vrms 1.4 +3 -3 1.1 104.0 119.6 117.9 159.5 132.6 179.4 176.9 239.3 -50
electric mitsubishi M65856SP mitsubishi sound processor ics digital echo with microphone mixing circuit absolute maximum ratings vcc vi pd topr tstg symbol name test conditions ratings units supply voltage circuit current input voltage operating temperature storage temperature 6.0 -0.3 ~ vcc+0.3 1.1 -20 ~ +75 -40 ~ +125 v v w ? ? recommended operating condition vil vih symbol parameter test conditions limits units l input level h input level v v min typ max 2.4 0 vdd 0.8 vcc v 4.5 5 5.5 supply voltage pin40,41,42 pin40,41,42
electric mitsubishi M65856SP mitsubishi sound processor ics digital echo with microphone mixing circuit function description operation mode operating modes can be set with serial data 16-bits entered at the timing given below. data(pin42) is taken inside at the rising edge of clock(pin41) and the last-packed 16-bits are latched at the raising edge of latch(pin40). latch clock 41 40 data d0 d1 d2 d3 d4 d5 d6 d7 d8 d9 d10 d11 d12 d13 d14 d15 42 data function control description d0 digital echo d1 d2 d3 d4 d7 d9 d10 d11 d12,d13 d14 d15 d8 source selector creates four kinds of delay signals between 104.0msec and 208.1msec. desired audio source operation to each "karaoke" software can be selected by the source selector. 5 kinds phase shifter surround surround is formed with phase shifter to increase the ambience of sound even when karaoke is used. auto vocal support on / off if you are in discomfort from unknown song, the vocal of the singer can be output support you. selector switch for turning on/off of auto vocal support. mic sw on / off selector switch for turning on/off of microphone signal mixing. data function control description d0 d1 d2 d3 d4 d5 d7 d8 d9 d10 d11 d12 d13 d14 address d6 echo effect volume sets volume attenuation in 8 steps between +3db ~ -15dband - . echo feed back volume sets volume attenuation in 5 steps between -2db ~ -7db and - . mic1 volume sets volume attenuation in 8 steps between 0db ~ -18db and - . mic2 volume sets volume attenuation in 8 steps between 0db ~ -18db and - . address data is taken inside d14=[l],d15=[h],and others cancel. data is taken inside d14=[l],d15=[h],and others cancel. d15 time external keycontrol ic changeover corresponding or decorresponding to changeover switch. keycon pass/through test mode d5 d6
electric mitsubishi M65856SP mitsubishi sound processor ics digital echo with microphone mixing circuit source select ?source selector (l+r) / 2 function control control data d3 d2 l l l h h l h h 138.7msec 208.1msec ?delay time control 156.0msec control data lch, monaural rch, monaural stereo d8 d7 phase shifter surround ?phase shifter surround control off control data l l l h h l h h on effect surround sw low high mid d9 ?auto vocal support switch off control data l h on delay time 104.0msec auto vocal support sw d11 ?microphone mixing switch off control data l h on mic sw remark microphone mixing off microphone mixing on l l h h d6 l d5 l h l h l d4 l h vocal cut d10 ?keycontrol ic pass / through sw control data l h d0 l d0 l l d0 d0 l d0 l d0 l d1 l h h delay off mode h remark correspond to external keycontrol uncorrespond to external keycontrol (notice) (notice) please set source selecter except for "stereo" when this switch correspond to external keycontrol, because the output signal for external keycontrol (34pin:sourceout)is corresponding to only monaural signal. (this ic is not corresponding to external keycontrol,when source selecter set up "stereo".)
electric mitsubishi M65856SP mitsubishi sound processor ics digital echo with microphone mixing circuit volume control ?microphone volume attenuation d6 d5 d4 ?echo feedback volume attenuation control data attenuation l l l l l h l h l l h h h l l (db) -2 -3 -5 -7 - d0 h d3 d2 d1 - ?echo effect volume attenuation control data attenuation l l l l l h l h l l h h h l l h l h h h l h h h (db) +3 0 -3 -6 -9 -12 -15 d0 h d15 d14 address ?address control control data l l l h h l h h data cancel data cancel data take inside d0 l,h d12 d11 d10 - control data attenuation l l l l l h l h l l h h h l l h l h h h l h h h (db) 0 -3 -6 -9 -12 -15 -18 d0 h d9 d8 d7 mic1 volume mic2 volume
electric mitsubishi M65856SP mitsubishi sound processor ics digital echo with microphone mixing circuit function description (1) auto reset settings are reset automatically when the ic is powered up. the reset state is automatically canceled approximately 120msec after powering up(vcc=5v and the capacitor connected to pin c=47?). by auto reset, operation mode setting become as follows. ?delay time control : 104.0msec ?source selector : stereo ?phase shifter surround control : off ?auto vocal support switch : off ?keycon pass/through sw :on ?microphone mixing switch : off ?echo effect volume : - ?echo feed back volume : - ?microphone volume attenuation : -9db (2) auto mute function the ic carries out auto mute function at the time of powering up, delay time setting change, in order to suppress shock noise that the digital delay may produce. ?at power up reset time mute time (400msec) mute time (400msec) ?at delay time setting change delay signal before change delay signal after change
electric mitsubishi M65856SP mitsubishi sound processor ics digital echo with microphone mixing circuit (3) clock oscillator circuit this ic incorporates a current control type clock oscillator circuit in it, thus providing circuit configuration just by connecting an rc for current control pin 2 (mclkcont). fully internal clock supply prevents occurrence of undesired radiation without affecting any external circuit. the oscillator frequency fck is following. fck = 2 mhz(rc=56k w ) rc clock oscillator circuit clock frequency:fck 2 dc current (4) microphone amplifier the gain(gv) and low cut-off frequency(fcl) of microphone amplifier are expressed as follows. 6 7 334k w 1.5k w 4 10k w (typ) 10k w mic r1 c1 1? ref gv=20log r1+1.5k+334k r1+1.5k fcl= 1 2 p ?(r1+1.5k) ?c1 gv(max)=47db,fcl=48.2hz r1=0 w ,c1=2.2? assuming gv=37db, fcl=15.1hz,for instance, the constants take the following values. r1=3.3k w ,c1=2.2?
electric mitsubishi M65856SP mitsubishi sound processor ics digital echo with microphone mixing circuit alc operating voltage can be set at a desired value between -10dbv and +3dbv by varying the dc voltage applied to pin 3 (alc operating voltage setting terminal). (setting method) (6)alc operating voltage setting to set alc operating voltage at -5db(vcc=5v) -5dbv=0.56vrms=1.59vp-p=0.8vp-o v alc =2.5-0.8=1.7v since the input impedance at pin 5 10 is high at 1m w or more, it is possible to provide alc operating voltage by dividing resistance. one side peak voltage,vpo voltage applied to 35 pin,valc ov valc= vcc-vpo 2 1 2.5v( vcc) internal dc bias 2 1 3 r vcc 51k 0.01 when vcc=5v voltage applied to pin 5 10 valc(v) alc operating voltage (dbv) resistance r( w ) +3 0 -2 -4 -6 -8 -10 0.50 1.09 1.38 1.61 1.79 1.94 2.05 5.6k 15k 20k 24k 27k 33k 36k (5)alc level diagram -30 -20 -10 0 +3 10 -50 -40 -30 -20 -10 microphone amplifier gain settig=47db alc operating voltage setting range vo(dbv) vi(dbv) -60 -70
electric mitsubishi M65856SP mitsubishi sound processor ics digital echo with microphone mixing circuit (7) input and output lpf for the digital echo the input and output lpf for the digital echo are configured as shown. figure below. 24k w 24k w 24k w c2:1000pf c1:4700pf input output 15 16 17 the accuracy of the internal resistance of the ic is approximately ?0% cut-off frequency(fc) is given as follows. quality factor (q) is given by the following equation for long echo. fc= 1 2 p x 24k w x c1xc2 q= c1 c2 1 3 = 1 2 p x24k w x 4700pf x1000pf =3.1khz =0.72 (figure of 0.7 is recommended) 14 2.2 . . . .
electric mitsubishi M65856SP mitsubishi sound processor ics digital echo with microphone mixing circuit release time 1.5s microphone volume input level output microphone signal detection on off on attack time 40ms the timing of microphone input signal detection signal detection source selector mode on off lch monaural vocal cut (l+r)/2 (l+r)/2 same as above stereo rch monaural (l+r)/2 reference level (ref+20mv) (8) auto vocal support if you can not continue sing a song, the reference vocal from the source will support you automatically.
electric mitsubishi M65856SP mitsubishi sound processor ics digital echo with microphone mixing circuit (10)following is the phase shifter block, which makes phase surround effect. source selector surround l r (l+r)/2 vocal cut stereo simulated stereo stereo surround lch output rch output lch input rch input c(external)=0.022? 38 39 phase shifter surround circuit the sound components of the same phase and same sound volume in the l and r channels are attenuated. this made also allows components with lower frequency than the vocal band to pass through the filter, to compensate insufficient low-frequency sound. lch input rch input lpf is formed by the internal r (20k w ) and the external c, where c=0.15? , cut off frequency is 53hz. fvc= 2 p cr 1 =53.0hz c 0.15 37 vocal cut block (9) vocal cut support output
electric mitsubishi M65856SP mitsubishi sound processor ics digital echo with microphone mixing circuit application example 0.01 22k 10 k 1.0 4.7 1.0 0.0047 0.001 0.068 0.1 47 0.1 0.1 0.068 0.0047 0.001 0.022 56k 1 1 0.15 1 100 2.2 51k mic1in mic2in 2.2 10 k 1.0 4.7 1.0 1 unit r: w c: f vcc vcc mic sw 2.2 vcc 2.2 gnd 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 17 mclk lpf a/d d/a lpf main logic 16kbit sram 1/2vcc echo vol echo f.bvol ?com i/f mic sw 16 18 19 20 21 42 41 40 39 38 37 36 35 34 33 32 31 30 29 27 28 26 25 24 22 alc alc mic vol mic vol (l+r) / 2 l r stereo phase shifter surround vcc 23 key control m65847fp/sp np np np np k k k k k k

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