MSS1507

MOSEL VITELIC INC. MSS0307/S0607/S0907/S1207/S1507/S1807 3"/ 6"/ 9"/ 12" / 15" / 18" VOICE ROM September 1996 Features Single power supply can operate at 2.4 V through 6.0 V. Current output can drive 8 ohm speaker with a transistor. The voice content can be separated to 32 sections. Duration of each section can be different and is multiples of 100 h. Duration of sections with appended memory-less mute is up to 21.8 seconds (20000h). 3 straight trigger pins are provided TGA, TGB, TGC. Each cross can access a sentence. 4 x 4 matrix trigger crosses are provided by RW1-4, K1-4. Each cross can access a sentence. Each sentence is composed of one or more sections. Lower key priority is provided for straight inputs and matrix cross inputs. Last key priority is provided for straight inputs. First key priority is provided for 4x4 crosses. Up to 512 table entries for all 32 sentences. Auto ramp up / ramp down & sleep functions are built in. INT(interrupt) function is provided. OKY function is provided optionally chipwise. Play all OKY is provided optionally chipwise. Random Play OKY is provided optionally chipwise. Playnext OKY is provided optionally chipwise. Continuous S.W.A.I. OKY is provided optionally chipwise. Home S.W.A.I. OKY is provided optionally chipwise. 5 output pins are provided. 20 ms debounce is provided. Sink LED is provided. •\؇°G Off LED when Playing audio is provided optionally entrywise. Slow Ring flash LED when playing audio is provided optionally entrywise. Dynamic flash LED when playing audio is provided optionally entrywise. Slow fix flash LED when playing audio is provided optionally entrywise. On LED when playing audio is provided optionally entrywise. High busy when playing audio is provided optionally entrywise. Low busy when playing audio is povided optionally entrywise. DC high (when playing audio and lasts to next trigger) is provided optionally entrywise. DC low(when playing audio and lasts to next trigger) is provided optionally entrywise. Low Stop after playing audio is provided optionally entrywise. High Stop after playing audio is provided optionally entrywise. OKY's sentences could be different from those from TGS'. 8 loudness levels are provided entrywise. 8 different pitches are provided entrywise. Edge trigger is provided optionally triggerwise. Level trigger is provided optionally triggerwise. Holdable output by TG is provided optionally triggerwise. Retriggerrable TG by itself is provided optionall y triggerwise. Retriggerrable TG by others is provided optionally triggerwise. High trigger is provided optionally triggerwise. 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(Preliminary) 1/39 PID247*** 09/96 MOSEL VITELIC INC. MSS0307/S0607/S0907/S1207/S1507/S1807 Description The MSSnn07 is a single-chip CMOS VLSI ROM that can memorize voice data up to nn seconds using MOSEL qualified coding method (5-bit MPCM) at 6.00 KHz in 32 sections with arbitrary length. Both the volume and pitch can be masked and different for each entry each sentence. 5 versatile outputs are available through programmable logic array. With minimum external components, this chip can be applied to various application. Customer voice data will be edited and programmed into ROM by changing one layer of mask during fabrication. ¬≤§∂ ≥o¨O§@¡˚±M¨∞≈‹¿W°B≈‹≠µ∂q©“≥]≠p™∫nn¨Ì™¯§ßªy≠µIC°AMSSnn07°C¶πIC•i•HøÔæ‹®C•y∏‹°B®C≠”¶r™∫≠µ∂qªPß ≠”øÈ•X∏}•i•H¶¤•—™∫™ÌπF®C•y∏‹°B®C≠”¶r™∫™¨∫A°C§j≥°•˜©“ª›™∫πs•Û≥£§w§∫´ÿ°A•i¨∞´»§·∏`¨Ÿ•~•[πs•Û™∫¶®•ª°C Mask Options Overall either Large or Small cout driving current either large (1-32) or small loop (17-32) on OKY cycle either continuously or homely PlayNext function among PlayAll, PlayNext or Random for OKY function either direct TGA or OKY for TGA pin either direct TGC or INTP for TGC pin either sink or drive for LED output (fixed at sink) Mask Options (entrywise) Mask Options (on straight triggers & OKY) either Level or Edge trigger type either Holdable or not either retriggerable or not either quick or normal debounce time either high or low active either internal pulling or not (fixed at pulling) either internal latch or not (fixed at latch) either power on play or not (fixed at no power on play) among 8 pitches for each entry among 8 loudness for each entry among 15 features for OS pin for each entry among 15 features for OW pin for each entry among 15 features for OX pin for each entry among 15 features for OY pin for each entry among 15 features for OZ pin for each entry among these 15 options for every entry every OUT pin: (A) high stop (B) low stop (C) high busy (D) low busy (E) DC high (F) DC low (G) LED dynamic 17/31 (H) LED dynamic 23/31 (J) LED dynamic 27/31 (N) LED fixed flash slow (R) LED ring flash slow (2) LED fix flash slow inverse (4) LED ring flash slow inverse (7) LED on (8) LED off. Mask Options (on matrix K input) either Level or Edge trigger type either Holdable or not either retriggerable or not either quick or normal debounce time (fixed at normal, =20 ms) Developement Tools M9026 emulaton board is provided M9026 pack.exe program is provided Computer format (Lotus 1-2-3 work sheet) request forms A1-A8, F, H are provided COB P28 is provided COB M9226 is provided Mask Options (for INT) either quick or normal debounce time either high or low active Voice Storage Reference Device MSS1807 MSS1507 MSS1207 MSS0907 MSS0607 MSS0307 Capacity 1A600h 16000h 11A00h D800h 9000h 5100h Duration at 6KHz S.R. Section 18.01 seconds 32 15.01 seconds 32 12.03 seconds 32 9.21 seconds 32 6.14 seconds 32 3.45 seconds 32 Entry / Sentence 512/32 512/32 512/32 512/32 512/32 512/32 Word with mute behide 20000h 20000h 20000h 20000h 20000h 20000h Specifications subject to change without notice, contact your sales representatives for the most recent information. (Preliminary) 2/39 PID247*** 09/96 MOSEL VITELIC INC. MSS0307/S0607/S0907/S1207/S1507/S1807 Block Diagram K1 K2 K3 K4 V DD V SS RW1 RW2 RW3 RW4 TGA/OKY TGB TGC/INT OS OW OX OY OZ TIMING GENERATOR CONTROL LOGIC TRIGGER TABLE ADDRESS GENERATOR VOICE ROM MPCM Decoder Varaible Pitch Buzzer Buffer Speaker Buffer V1 V2 C OUT Rosc CLOCK GENERATOR Varaible Loudness Pad Description Pad # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Signals V2 V1 Vss Rosc TGC/INTP TGB TGA/OKY Vdd NC K4 K3 K2 K1 RW1 RW2 RW3 RW4 OZ OY OX Cout OW OS I/O 1 O 1 O 1 Power 1 I 1 I 1 I 1 I 1 Power 1 1 I 1 1 1 1 1 1 1 1 1 1 1 1 1 I I I O O O O O O Function Voltage output 1, to drive buzzer Voltage output 2, to drive buzzer Ground Rosc Trigger C or Interrupt input, mask optional Trigger B input Trigger A or one-key input, mask optional Positive power supply No connection Matrix trigger column input 4 Matrix trigger column input 3 Matrix trigger column input 2 Matrix trigger column input 1 Matrix trigger row input 1, feed signal to K pin(s) when contact Matrix trigger row input 2, feed signal to K pin(s) when contact Matrix trigger row input 3, feed signal to K pin(s) when contact Matrix trigger row input 4, feed signal to K pin(s) when contact Output signal Z Output signal Y Output signal X Current Output, to drive speaker through transistor Output signal W Output signal S Specifications subject to change without notice, contact your sales representatives for the most recent information. (Preliminary) 3/39 PID247*** 09/96 MOSEL VITELIC INC. MSS0307/S0607/S0907/S1207/S1507/S1807 Signals Cout Cout is tristate during standby. Cout has zero current output when sound data is zero. Cout has full current output when sound data is the highest. Cout has half of full current output when sound is silence at middle data value. Cout has half of full current output when playing sound at appended memory-less mute. Ico of Cout behaves two different characteristics shown as curve 2 and curve 3. Curve 3 is recommended when operating at 2.5V through 5.0V. Curve 2 is recommended when operating at 5.0V through 6.0V. The bypass Cout Resistor (named R2) is used to bypass the audio output current from Cout. This bypassing extra current to ground gives a way to prevent the saturation of audio waveform amplified by transistor. This Resistance of R2 is 470 ohm typically. It always is not very small. Or user can let it open if the transistor has a fair beta value. Due to Cout depends on Vdd bias very much, this R2 resistance needs be very carefully selected when user supplies the voltage potential source in poor flatness or in poor drive capability. What the poor source means either its potential drops as the load varies or its potential drops as its capacity exhausted. A transistor with beta value 150 is sufficient for typical applications. Larger beta value get larger sound but may have the amplified waveform saturated. 8 ohm speaker is recommended. The speaker characeristics and housing impacts the loudness very much. When user is using variable loudness, user must carefully calculate the bypass resistance R2 and transistor's beta value due to that the current from Cout may vary very much due to user's specified loudness variance. V1, V2 They are tristate during standby state. These two pins can drive buzzer directly. The p iezo buzzer used should have its resonant frequency at the center of your sound frequency domain or you are unable to play your sound good by this buzzer. For instance, you have your sound spans over frequency from 100 Hz through 1 KHz. A buzzer with resonant frequency at 300 Hz will play this sound good. A buzzer with resonant frequency at 1 KHz will distort the sound very much because that most of the energy of the playback sound is unable to be played by this buzzer. OS, OW, OX, OY, OZ There are 5 output pins provided. Each pin can perform its performance independent on other four pins. An output pin can be masked to perform one out of 15 features per entry. But it has restriction : a pin can perform up to 8 features only at a mask code. These 8 features should not have too fa r relationships. Contact our sales representatives if you want to use diverse output performance. Rosc This is a pin to provide bias to activate built in VCO circuit. A 600 K ohm resistor serial from Vdd to this pin (named R1) can play the audio output at 6 KHz sample rate at pitch option 4. Larger Resistance provided at this location plays lower sample rate. A 240 Kohm resistor plays 15 KHz sample rate at same condition. The Vdd bias has very less impact on the relationship between Rosc and sample rate. To play 6 KHz, user needs 600 K ohm at 3 Vdd and 590 K ohm at 6 Vdd. To play 15 KHz, user needs 240 K ohm at 3 Vdd and 230 K ohm at 6 Vdd. K1, K2, K3, K4 These four pins have two ways to perform. To cooperate with RW1, RW2, RW3 and RW4, they form a 4 x 4 matrix in 16 cross points. The touch of a cross point will pass signal from a RW pin to this K pin and activates a trigger signal to play respectively sentence. To not cooperate with RWn, these K pins can act as straight trigger and work standalone. A Vdd provided to Kn can play sentence. RW1, RW2, RW3, RW4 These four pins can cooperate with Kn pins to form a 4 x 4 matrix in 16 cross points. The touch of a cross point passes signal from this RW pin to K p in(s) and activates a trigger signal to pla y corresponding sentence. The result to be played is not guaranteed when operating at below three conditions:(1) All four RWn signal pins tied together, (2) Any three RWn signal pins connected together, (3) Any two RWn signal pins connected together. The result may even be no sound played. Specifications subject to change without notice, contact your sales representatives for the most recent information. (Preliminary) 4/39 PID247*** 09/96 MOSEL VITELIC INC. MSS0307/S0607/S0907/S1207/S1507/S1807 Terms Retriggerable TG Retriggerable TGm means the sentenc e addressed by TGm could be retriggerred by other TGs. See Timing diagrams I & III. Of course, it can be retriggered by itself. See Timing diagrams I. Ramp up When a sentence starts playing from silence, the audio output (either Cout or V1, V2) starts from zero current and ramps up to the half scale of full audio output in 128 steps. These 128 steps' gaps are uniform. After these 128 steps accomplished the sentence sound data begins. As this is hardware implement, the first data byte of a sound file is asked to be center value. for 8 bit PCM data file, the center value is 80h. Herein zero output does not mean zero potential, neither ground. Ramp down Whenever a sentence is played and finished, the audio outputs (either Cout or V1, V2) try going from last data down to zero. There is an interval provided in width t PL. Without redundant ramp down and up within this interval, the audio output keeps at center value of full audio signal. This is to keep the audio output sounds continued if there comes a latter sentence. This interval starts from the last data pixel to the ramp down starts. Because the output is kept at center value of full audio signal, the last data pixel of a sound file is recommended as center value. For 8 bit PCM data file, the center value is 80h. After this t PL interval finished and there comes no new comer sentence, the audio output gradually reduces in 128 steps from the center value of full audio signal down to zero output. Herein zero output does not mean zero potential, neither ground. Trigger A trigger mentioned in this data sheet does mean either a certain pin or an activated input signal. It could be: (1) a high signal to straight input (2) a low signal to straight input (3) a cross touch of a pin K and a pin RW. Power on play This function is not provided even hav e appropriate wiring. Active high and active low An input pin can be masked as either active high or active low. Specifications subject to change without notice, contact your sales representatives for the most recent information. This active-high pin is internal pull low and no latch. This active-low pin is internal pull high and no latch. Small Loop & Large Loop This is a function belongs to OKY. OKY plays many sentences, up to 32. User can play 1st sentence through 32nd sentence if user selects "large loop". At this time the sentence lst, 2nd, 3rd and 4th may be triggerred by TGs. User will play 16 sentences, from 17th through 32nd sentence, when user selects "small loop". User may have less sentences triggered by OKY at this selection. But user definitely can prevent those OKY's sentences triggerred by TGs. Cycle Loop This is a count number ranges 1 through 32 which defines the sentence range OKY will play. This number is user definable and could be equal to or less than sentence defined. Continuous OKY & Home OKY This is a function belongs to OKY and determines the play sequence when the first OKY comes after any other trigger addressing. The "continuous" preserves the sequence while the "home"rewinds to the very beginning. This very beginning means either 17th sentence or 1st sentence which is determined by Loop Size - small or large. You will see a term S.W.A.I. in this data sheet, it means sequence when after interrupt by other trigger addressing. Ramdom Play OKY A trigger at OKY will play a sentence randomly out from specified sentence group. But not every mask option combination provides random play. It is provided only when masked as edge and unhold. It is regardless retrigger or not. Herein sentence group is determined by cycle loop and small / large loop. (Preliminary) 5/39 PID247*** 09/96 MOSEL VITELIC INC. MSS0307/S0607/S0907/S1207/S1507/S1807 LEDW is turned on for t ONL and then turns off for 3 x t ONL. And cycles. The LEDX turns on right after LEDW turns off. LEDX is turned on for t ONL and then turns off for 3 x t ONL. And cycles. The LEDY turns on right after LEDX turns off. LEDY is turned on for t ONL and then turns off for 3 x t ONL. And cycles. This 340 ms t ONL equals 1 over 2.93. Of course, this is valid within sound activated period. This t ONL is sample rate dependent. If user needs 4 LED lamps to perform ring flash. These 4 pins are only candidates. Other 4 - lamp combinations are not guaranteed. Ring Flash 3 LEDs slow User can specify 3 LEDs ring at slow speed. It means LEDS is turned on for t ONL and then turns off for 2 x t ONL. And cycles. The LEDW turns on right after LEDS turns off. LEDW is turned on for t ONL and then turns off for 2 x t ONL. And cycles. The LEDX turns on right after LEDW turns off. LEDX is turned on for t ONL and then turns off for 2 x t ONL. And cycles. This 340 ms t ONL equals 1 over 2.93. Of course, this is valid within sound activated period. This t ONL is sample rate dependent. If user needs 3 LED lamps to perform ring flash. These 3 pins are only candidates. Other 3 - lamp combinations are not guaranteed. Ring Flash 3 LEDs slow & inverse User can specify 3 LEDs ring at slow & inverse. It means LEDS is turned off for t ONL and then turns on for 2 x t ONL. And cycles. The LEDW turns off right after LEDS turns on. LEDW is turned off for t ONL and then turns on for 2 x t ONL. And cycles. The LEDX turns off right after LEDW turns on. LEDX is turned off for t ONL and then turns on for 2 x t ONL. And cycles. This 340 ms t ONL equals 1 over 2.93. Of course, this is valid within sound activated period. This t ONL is sample rate dependent. If user needs 3 LED lamps to perform ring flash. These 3 pins are only candidates. Other 3 - lamp combinations are not guaranteed. Ring Flash 4 LEDs slow & inverse User can specify 4 LEDs ring at slow & inverse. It means LEDS is turned off for t ONL and then turns on for 3 x t ONL. And cycles. The LEDW turns off right after LEDS turns on. LEDW is turned off for t ONL and then turns on for 3 x t ONL. And cycles. The LEDX turns off right after LEDW turns on. LED sink and drive The LED lamp could be turned on at output pin by sink connection. No drive is provided. Fix Flash slow LED Fix flash slow means this pin turns LED lamp on for t ONL and then turns it off for t ONL alternately. And it truns on LED lamp right at the ramp up starts. It turns off LED lamp right after sound ends. Even within t PL interval, before ramp down starts, the LED lamp is turned off. Fix Flash LED slow & inverse This is similar to "Fix flash slow LED" but inversed within the sound activated period. The inverse means whenever the LED pin turns on the "inverse pin" turns off LED. By this feature, user can specify two LEDs, or more, turns on and off alternately within the sound activated period. Dynamic Flash LED The LED turns on whenever the sound amplitude is over a certain threshold potential. This threshold can be specified per pin per entry. There are three thresholds:17/31, 23/31 and 27/31. Five output pins could have identical thresholds or not. An output pin specified to 17/31 means it could be turned on whenever the sound plays at an amplitude over 54% of full scale output. An output pin specified to 17/31 is easier to turn on than an output pin specified to 23/31. Ring Flash 5 LEDs slow User can specify 5 LEDs ring at slow speed. It means LEDS is turned on for t ONL and then turns off for 4 x t ONL. And cycles. The LEDW turns on right after LEDS turns off. LEDW is turned on for t ONL and then turns off for 4 x t ONL. And cycles. The LEDX turns on right after LEDW turns off. LEDX is turned on for t ONL and then turns off for 4 x t ONL. And cycles. The LEDY turns on right after LEDX turns off. LEDY is turned on for t ONL and then turns off for 4 x t ONL. And cycles. The LEDZ turns on right after LEDY turns off. LEDZ is turned on for t ONL and then turns off for 4 x t ONL. And cycles. This 340 ms t ONL equals 1 over 2.93. Of course, this is valid within sound activated period. This t ONL is sample rate dependent. Ring Flash 4 LEDs slow User can specify 4 LEDs ring at slow speed. It means LEDS is turned on for t ONL and then turns off for 4 x t ONL. And cycles. The LEDW turns on right after LEDS turns off. Specifications subject to change without notice, contact your sales representatives for the most recent information. (Preliminary) 6/39 PID247*** 09/96 MOSEL VITELIC INC. MSS0307/S0607/S0907/S1207/S1507/S1807 DC 1 is read as D.C. one and is quick form of DC high. This is a function belongs to OUTs. User may be confused it with Busy. It is similar to Busy signal but it is not only valid during audio is being played, like Busy, but also valid after the audio has been played. Its response lasts until next audio entry is activated. DC0 means zero potential (Vss) while the DC1 means the Vdd. Output pins at Cout plays mute Mute has two types in MVI's Snn07 voice chip. Both t hese two types of mute are treat as sound for considering the output. The Stop is generated after every mute. Busy is valid during every mute. LED works at every mute. Be careful that t PL interval does not count in mute. Stop Pulse Stop pulse is genrated right at the sound ends and lasts for 40 ms typically. The mask options provide either high stop pulse or low stop pulse. Stop pulse width is determined on the sample rate as well as the pitch of that playing entry when stop pulse occurs. This 40 ms stop pulse is sufficiently wide to activate TGA (or TGB or TGC) by feed back wiring. Sample Rate There are some parameters depend on sample rate. They are debounce time, ramp up time, ramp down time, plain time, LED Ring frequency, LED fix flash frequency and Stop pulse width. The numbers mentioned in this data sheet are based on 6 KHz sample rate if not specified. Higher SR has LED flashes quicker. Higher SR makes Stop pulse shorter. Higher SR let the debounce time shorter. Higher SR makes the ramp up time quicker. Higher SR makes the ramp down time quicker, too. Higher SR makes shorter plain time. This chip provides multi-SR function. What it means is that user can digitize two different sounds in different SR but plays them by a common Rosc. For example, user has rocket sound digitized in 9.5 KHz but have rooster digitized at 6 KHz. While manufactured, user just specify different pitch numbers on request form - 4 for rocket and 1 for rooster. The chip could be played those two sounds at a Rosc fit for 6 KHz SR. Because that "pitch 4" at 6 KHz Rosc means 6 KHz playback while "pitch 1" at 6 KHz Rosc meas playback in 1.6 times 6 KHz. The 600K ohm Rosc playback 6 KHz sample rate typically, but just typical. Smaller Rosc playbacks quicker - Higher pixel rate. MVI provides voice chip with very flat response for playback vs working voltage . Higher working voltage get slower playback bu t insignificantly. Lower Key Priority What's the result when multi triggers are activated simultaneously? Which trigger is acknowledged among these ninteen? Among these sixteen? Among these three? Between these two? LEDX is turned off for t ONL and then turns on for 2 x t ONL. And cycles. The LEDY turns off right after LEDX turns on. LEDY is turned off for t ONL and then turns on for 2 x t ONL. And cycles. This 340 ms t ONL equals 1 over 2.93. Of course, this is valid within sound activated period. This t ONL is sample rate dependent. If user needs 4 LED lamps to perform ring flash. These 4 pins are only candidates. Other 4 - lamps combinations are not guaranteed. Ring Flash 5 LEDs slow & inverse User can specify 5 LEDs ring at slow & inverse. It means LEDS is turned off for t ONL and then turns on for 4 x t ONL. And cycles. The LEDW turns off right after LEDS turns on. LEDW is turned off for t ONL and then turns on for 4 x t ONL. And cycles. The LEDX turns off right after LEDW turns on. LEDX is turned off for t ONL and then turns on for 4 x t ONL. And cycles. The LEDY turns off right after LEDX turns on. LEDY is turned off for t ONL and then turns on for 4 x t ONL. And cycles. The LEDZ turns off right after LEDY turns on. LEDZ is turned off for t ONL and then turns on for 4 x t ONL. And cycles. This 340 ms t ONL equals 1 over 2.93. Of course, this is valid within sound activated period. This t ONL is sample rate dependent. Initial high & Initial low This is a function belongs to OUTs. It defines the state only from power on to the first audio activated. It is effective for all 15 features. "Initial low" means user want this OUT pin is put to low whenever this chip is power on. "Initial high" means vice versa. Initial high is good for LED because that high will forbid the LED to be turned on, user want not keep the LED light even user don't use very long time since user power on the chip. So, we suggest user to define "initial high" whenever LED is chosen for that OUT pin. But it is not absolutely right. User may on purpose turn it on once user likes it. Initial low is good for Busy because that low will have every Busy starts from zero on whole time line. So, user are suggested to define "initial low" whenever Busy is chosen for that OUT pin. But it is not absolutely right. User may on purpose have a high to do whatever user want, to turn a motor running this way or tell a situation since power on, etc. The similar situation for DC high or low. The similar situation for Stop signal. DC 0 & DC 1 DC 0 is read as D.C. zero and is quick form of DC low. Specifications subject to change without notice, contact your sales representatives for the most recent information. (Preliminary) 7/39 PID247*** 09/96 MOSEL VITELIC INC. MSS0307/S0607/S0907/S1207/S1507/S1807 Application Notes R1 Oscillation Resistor at pin Rosc, see chapter Signals paragraph Rosc as well as DC Characteristics for detail. R2 Bypss Resistor at pin Cout, see chapter Signals paragrahp Cout for detail. R cds Maximal contact resistance. Whenever try to activate the input signal pin at matrix triggers, to have the cross point contacted will activate it. However, there may be resistance on the cross point A resistance higher than this R cds will be unable to activate the trigger. To apply Vdd (or Vss, depends on mask option specified) directly to stand-alone trigger will activate the trigger. However, there may be resistance on the contact point. A resistance higher than R cds will be unable to activate the trigger, either. To limit current runs through LED lamp S1207 output pin provides huge drive (or sink) current capability. But the LED lamp may not need so huge current to have a best performance. To serial a resistor along with LED lamp is recommended. Don't flash LED at Cout Silence The LED lamp flashes well in whatever options user specified when the sound is playing. Don't flash LED lamp when Cout stays at mute is strongl y recommended. If user insists, please be noted that there is a slight drum stream comes out at speaker. Its frequency is double the frequency of LED flash. Its loudness depends on the Vdd bias, transistor amplification and count of LED lamp flashes. It could be -35 dB (or even lower as -50 dB) lower than the meaningful sound p layed at the office operation environment and hand-touchable distance. The lower key priority means the trigger with lower i ndex has the priority to be acknowledged and responsed when there are several triggers activated simultaneously. For example: Three triggers are activate d simultaneously, RW3K1, RW2K3, RW4K2. The RW3K1 has the priority, sentence 3 will be responsed. For another example: Five triggers are activated simultan eously, RW1K2, RW2K3, TGA/OKY, TGB, TGC. The RW1K2 has the priority, sentence 5 will be responsed. There is a priority reference on page 9/39 and a timing diagram III to illustrate it. First Key Priority First key priority is available among 16 mafrix triggers. This defines the relationship on time line for two or more triggers overlap. While user activating a trigger, for example RW2K2, and its sound plays, user is unable to activate the other trigger once RW2K2 is kept activated regardless sentence 6 is finished or not. It means first trigger prohibits the acknowledge of later triggers when trigger is kept true. Last Key Priority Last key priority is available among three straight keys TGA, TGB, TGC. This defines the relationship on time line for two or more triggers overlap. What will it result when a trigger is activated while a trigger is true ahead and kept true ? While user already activates a trigger, for example TGC, and keeps this TGC true, the later trigger is still able to come in and acknowledged by chip. It means the late trigger is not prohibited by priorer. See timing diagrams III.4,5,6 for reference. User may be confused it with "retrigger". They are different. Key Priority Reference Conditions Priorer Later Priority Result Between Straight Triggers TGm TGn Last key Between Straight trigger And Matrix trigger TGm KiRWj KiRWj TGm Not Guaranteed Not Guanranteed Between Matrix triggers KhRWi KhRWj First key KiRWh KjRWh First key KiRWm KjRWn First key Legend : Priorer Later Specifications subject to change without notice, contact your sales representatives for the most recent information. (Preliminary) 8/39 PID247*** 09/96 MOSEL VITELIC INC. MSS0307/S0607/S0907/S1207/S1507/S1807 Pitches Reference h Mask Index Playback PlaybackPitc 111 7 73% x Fosc Fosc / 1.37 Slowest 110 6 80% x Fosc Fosc / 1.25 101 5 88% x Fosc Fosc / 1.13 100 4 100% x Fosc Standard 011 3 115% x Fosc 010 2 133% x Fosc 001 1 158% x Fosc 000 0 198% x Fosc Fastest The precision is +/- 10% Loudness Levels Reference Mask 111 110 101 100 011 010 001 000 Index 7 6 5 4 3 2 1 0 I output Loudness 100% x Ico Loudest 87% x Ico 75% x Ico 62% x Ico 50% x Ico 37% x Ico 25% x Ico 12% x Ico Least Loud The precision is +/- 10% Lower Key Priority Reference Priority 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Trigger K1RW1 K1RW2 K1RW3 K1RW4 K2RW1 K2RW2 K2RW3 K2RW4 K3RW1 K3RW2 K3RW3 K3RW4 K4RW1 K4RW2 K4RW3 K4RW4 TGA/OKY TGB TGC/INT Sentence 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Remarks Highest Ico Reference Curves Ico(mA) 6 5 4 3 2 1 Curve 3 Curev2 3 4 5 6 (Vdd) These curves show the typical values. The max. and min. values are not identified. Lowest Absolute Maximum Rating Symbol VDD ~ VSS VIN VOUT T (Operating) T (Storage) Fosc Characteristics Unit V V V C C 2000 Fosc(H2) 6000 Rating -0.5 ~ +7.0 VSS -0.3 < V IN < VDD+0.3 VSS