1 32 to 40 sec inst ant voice rom features * voice length at - 8 khz sampling is 32 seconds - 6 khz sampling is 40 seconds * silence compression to save memory * eight trigger pins,tg1 to tg8 for 32 sections * sbt pin play-all or sequential play-all * 15 ms debounce time suitable for cds * irp interrupt pin stops playback at once * stp stop pulse generated at end of playback * busy signal for cpu control * two leds flash at 3 hz internal * 3.0v to 6v single power supply operation * low standby current (<5 ua at 3v) * auto-power down * built-in oscillator, d/a converter, eprom * adpcm data compression * optional pop noise elimination function *c out pin drives speaker with a transistor * development tools support *v out 1 and v out 2 drives buzzer directly * sampling rate determined by external resistor * holdable and unholdable triggering option * industrial temperature available general description api840n is a high-quality voice synthesizer with a capacity of 32 to 40 seconds. a proprietary adpcm algorithm is used. the audio message is stored in a 1024-kbit on-chip eprom. the api840n eliminates the need of complicated circuitry in voice playback (figure 1) but still achieves high voice quality. sounds such as human speech, animal sounds, musical sounds, and even special sound effects can be synthesized. devices can be cascaded to achieve longer voice duration (figure 3). two devices can be configured in parallel (figure 4) in order to achieve signal mixing without an external mixer allowing speeches to be mixed with background music synthesis from two different chips. the instant programming nature of the api840n allows a very short production turnaround time. there are no nre charges that are usually required with conventional voice roms. users now can apply a voice synthesis function as an additional feature to their products even when production volume is relatively small. it is also ideal for trial or engineering prototyping. as a result, the initial investment is minimal and the risk in the product development phase is reduced. the api840n provides a wide voltage operating range from 3.0v to 6.0v. a pair of pwm output pins, v out 1 and v out 2 provide direct drive to a buzzer (figure 2). voice quality from a buzzer is comparable to speaker output and power consumption is much lower. a current output pin, c out , enables the device to drive a speaker with a low cost npn transistor. no complex filtering or amplifier circuit is needed. an automatic ramp up/down function eliminates the undesired noise at the end of playback. up to 32 sections are accessible through tg1 to tg8 .the sbt trigger pin can be programmed to playback all 32 sections or sequentially from section 1 to 32. an interrupt pin (irp) and stop pulse (stp) or busy signals provide handshaking with microprocessors or other api840n devices. all trigger pins give 15 ms debounce time and is ideal for cds applications as in figure 6. two led drivers are available, flashing on and off at approximately 3hz intervals (figure 5). the internal voltage compensation oscillator requires only one external resistor. different sampling frequencies are determined by the external oscillator resistor value. june 1999 aplus api840n
2 programmable options the api840n provides different control functions for user specified applications. they include: * non-sequential or sequential play-all * unholdable or holdable trigger * stop or busy signal selection * automatic ramp-up/ramp-down or no ramp-up/ramp-down oscillator osc clock generator control logic tg1 tg8 sbt irp led driver led2 led1 stp pop noise reduction address sequencer voice eprom adpcm decoder buzzer buffer d/a c out v out1 v out2 gnd vcc block diagram operating range range ambient temp. vcc commercial 0 c to +70 c 3.0v to 6.0v industrial -40 c to +85 c 3.0v to 6.0v absolute maximum ratings (1) symbol parameter value unit v term terminal voltage with respect to gnd -0.5 to +7.0 v t bias temperature under bias -40 to +85 c t stg storage temperature -55 to +125 c notes: 1. stress greater than those listed under absolute maximum ratings may cause permanent damage to the device. this is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect reliability. silence compression if a particular sound sequence includes periods of silence, the api840n will automatically compress the silence to save memory space. this compression will not affect playback of the sound sequence. aplus api840n
3 section triggering tg1 tg2 tg3 tg4 tg5 tg6 tg7 tg8 section high nc nc nc nc nc nc nc 1 nc high nc nc nc nc nc nc 2 nc nc high nc nc nc nc nc 3 nc nc nc high nc nc nc nc 4 nc nc nc nc high nc nc nc 5 nc nc nc nc nc high nc nc 6 nc nc nc nc nc nc high nc 7 nc nc nc nc nc nc nc high 8 high high nc nc nc nc nc nc 9 nc high high nc nc nc nc nc 10 nc nc high high nc nc nc nc 11 nc nc nc high high nc nc nc 12 nc nc nc nc high high nc nc 13 nc nc nc nc nc high high nc 14 nc nc nc nc nc nc high high 15 high nc nc nc nc nc nc high 16 high high high nc nc nc nc nc 17 nc high high high nc nc nc nc 18 nc nc high high high nc nc nc 19 nc nc nc high high high nc nc 20 nc nc nc nc high high high nc 21 nc nc nc nc nc high high high 22 high nc nc nc nc nc high high 23 high high nc nc nc nc nc high 24 high high high high nc nc nc nc 25 nc high high high high nc nc nc 26 nc nc high high high high nc nc 27 nc nc nc high high high high nc 28 nc nc nc nc high high high high 29 high nc nc nc nc high high high 30 high high nc nc nc nc high high 31 high high high nc nc nc nc high 32 aplus api840n
4 pin descriptions name i/o function tg8 i trigger switch 8, internal pull low, active high o drives first led flash at 3 hz, active low v out1 o pwm audio signal output for buzzer v out2 o compliment pwm audio signal output for buzzer gnd - power ground stp/busy o generate 30 ms pulse or busy signal after voice playback o drives second led flash at 3 hz, active low c out o current output from internal dac for speaker playback osc i oscillator resistor pin to control sampling frequency tg5 i trigger switch 5, internal pull low, active high tg6 i trigger switch 6, internal pull low, active high v pp - program power supply, no connect when voice playback tg1 i trigger switch 1, internal pull low, active high tg2 i trigger switch 2, internal pull low, active high v cc - positive power supply tg3 i trigger switch 3, internal pull low, active high tg4 i trigger switch 4, internal pull low, active high sbt i one key or sequential trigger, internal pull low, active high irp i interrupt to stop playback, internal pull low, active high tg7 i trigger switch 7, internal pull low, active high note: 1. the following pins are used to program data into the memory on the chip: pins 5, 6, 7, 9, 12, 15, 18 and 19. pin configuration 20-pin 300-mil pdip 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 tg8 led1 v out1 v out2 gnd stp led2 c out osc tg5 tg7 irp sbt tg4 tg3 v cc tg2 tg1 v pp tg6 aplus api840n led 1 led 2
5 dc characteristics symbol parameter description condition min. typ. max. unit v cc operating voltage 3.0 4.5 6.0 v i sb standby current v cc = 3.0v, i/o open - 1 5 m a i op operating current vcc = 3.0v, i/o open - - 100 m a v ih input high voltage vcc = 3.0v 2.5 3.0 3.5 v v il input low voltage vcc = 3.0v -0.3 0 0.3 v i oh v out low o/p current vcc = 3.0v, v out = 0v - -12 - m a i ol v out high o/p current vcc = 3.0v, v out = 3.0v - 1 2 - ma i co c out o/p current vcc = 3.0v, v cout = 0.7v - - 2 - ma i stph stp low o/p current vcc = 3.0v, v stp = 0v - - 5 - ma t stpl stp high o/p current vcc = 3.0v, v stp = 3.0v - 5 - m a i led output current led vcc = 3.0v - 6.0v 6 8 10 ma d f/f frequency stability f osc (3v) - f osc (3.5v) - - 5 % f osc (3v) bonding parameters pin name x y 1 tg8 3451.9 1599.7 2 3451.9 1861.0 3v out1 3451.9 2147.6 4v out2 3451.9 2444.5 5 gnd 3368.10 2803.35 6 stp 137.18 2795.93 7 100.4 2486.3 8c out 100.4 2245.0 9 osc 100.4 1790.0 10 tg5 100.4 1469.5 11 tg6 100.4 1230.0 12 v pp 100.4 989.6 13 tg1 100.4 662.3 14 tg2 100.4 422.7 15 v cc 187.05 113.78 16 tg3 3372.5 141.8 17 tg4 3451.9 581.5 18 sbt 3451.9 836.0 19 irp 3451.9 1090.6 20 tg7 3451.94 1345.13 bonding diagram (0,0) x y note: substrate must be connected to gnd pad size = 100 m m x 100 m m 5 4 3 2 1 20 19 18 17 16 6 7 8 9 10 11 12 13 14 15 aplus api840n led1 led2 die size:3628 m m x 3797 m m
6 pulse triggered. a. trigger is shorter than a phrase output b. trigger is longer than a phrase output tg1 phrase 2 tg2 c out phrase 1 phrase 2 phrase 2 single button trigger, non-sequential play-all (sbt) a. pulse triggered b. level triggered phrase 1 sbt c out phrase 2 phrase n phrase 1 phrase n phrase 1 phrase 1 sbt c out phrase 2 phrase 1 phrase n phrase 1 level triggered a. trigger is shorter than a phrase output b. trigger is longer than a phrase output tg1 phrase 2 tg2 c out led phrase 1 phrase 2 phrase 2 aplus api840n timing diagram stp led
7 single button trigger, sequential (sbt) a. pulse triggered b. level triggered phrase 1 sbt c out phrase 2 phrase 2 phrase 2 phrase n phrase 1 phrase 1 sbt c out phrase 2 phrase 2 phrase 2 phrase n phrase 1 aplus api840n
8 application circuits vcc gnd tg1 tg2 tg3 tg4 tg5 tg6 tg7 tg8 sbt irp osc c out sp r osc vcc gnd sbt irp osc c out sp r osc vcc gnd sbt irp osc r osc c out stp figure 1. typical application with speaker figure 3. cascade application figure 2. typical application with piezo buzzer vcc gnd tg1 tg2 tg3 tg4 tg5 tg6 tg7 tg8 sbt irp osc v out2 r osc v out1 piezo buzzer aplus api840n
9 application circuits vcc gnd tg1 tg2 tg3 tg4 tg5 tg6 tg7 tg8 sbt irp tg1 tg2 tg3 tg4 tg5 tg6 tg7 tg8 sbt irp osc c out sp r osc vcc gnd osc c out r osc vcc gnd tg1 tg2 tg3 tg4 tg5 tg6 tg7 tg8 sbt irp osc c out sp r osc led2 led1 figure 5. led application figure 4. parallel application (mixing two speeches or speech with background music) aplus api840n
10 notes: the following are typical values: 1. r osc = 2.0 mw. 2. b for n (npn transistor) > 130. 3. sp = 8w. 1/4w. 4. piezo buzzer resonant frequency = 1 khz. application circuits vcc gnd tg1 tg2 tg3 tg4 osc c out sp r osc r osc vcc gnd osc cds irp sbt c out sp sw4 sw3 sw7 sw6 sw5 sw8 sw2 sw1 figure 6. cds application and additional trigger aplus api840n
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