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1/22 MSM9831-XXX ? semiconductor general description msm9831 is a pcm-based voice synthesis lsi (playback only) with on-chip 384kbit mask rom, d/a converter and low-pass filter. serial input interface for an external mcu makes msm9831 a better choice for size-critical applications with less wiring pin-count in small foot-print packaging. features ? 8-bit oki non-linear pcm algorithm ? sampling frequency (selectable on each phrase) 4.0/5.3/6.4/8.0/10.6/12.8/16.0 khz ? on-chip mask rom capacity : 384 kbits ? maximum playback time length 12.0 sec. at fsam = 4.0 khz 6.0 sec. at fsam = 8.0 khz 3.0 sec. at fsam = 16.0 khz ? clock oscillation 3.5 to 4.5 mhz (ceramic oscillation) 3.5 to 17 mhz (external clock) ? user definable phrase control table function ? maximum number of phrases : 31 phrases ? 10-bit current-output-type d/a converter ? a built-in lpf ? power supply voltage : +2.0 to +5.5 v (external clock) +2.5 to +5.5v (ceramic oscillation) ? package: 8-pin sop package (sop8-p-250-1.27-k) (product name: MSM9831-XXX ma) comparison table with msm9802 ? semiconductor MSM9831-XXX voice synthesis lsi with on-chip 384kbit mask rom msm9831 mask rom capacity 384k bit interface mcu (serial) oscillation ceramic/external clock max. phrase number 31 d/a converter current flowing forced into the circuit msm9802 512k bit mcu (parallel)/stand-alone ceramic/cr 63 forced out of the circuit status signal output none nar/ busy e2d0097-19-94 this version: sep. 1999
2/22 MSM9831-XXX ? semiconductor pin configuration (top view) st pi gnd aout pdwn xt xt v dd 1 2 3 4 8 7 6 5 8- p in plastic sop block diagram 384-kbit rom 2-kbit rom phrase control table 2-kbit rom phrase addres table test rom 2-kbit pcm data area 378-kbit 16-bit address controller serial interface pcm synthesizer 10-bit dac lpf aout gnd v dd st pi pdwn timing controller osc circuit xt xt reset, power down 10 8 8 8 16 5
3/22 MSM9831-XXX ? semiconductor pin descriptions symbol i/o description st i playback starter pin. phrase address (number) is determined by the number of times of input to pi pin while st being held "l". playback starts on st 's rising edge with phrase address data loaded into the lsi. when no pulse input to pi made while st being held "l", the lsi recognizes it as "stop code" to stop playback. pi i address input pin. the phrase number to playback is determined by the times of pulse pulse input to pi pin while st being held "l". 32-time pulse input has the internal counter initialized. gnd gnd pin. aout o analog output pin. built with n-mos open-drain type, wave-form output is made in the form of changing output current. while pdwn being held "h", aout maintains 1/2 level output, thus the current keeps on flowing. the pop-noise canceller is put into works when standby is reset to return to be active, and when entering into standby mode. v dd power supply pin. insert a 0.1 m f or larger by-pass capacitor in-between gnd pin and this pin. xt i wired to the ceramic oscillator when a ceramic oscillator is in use. input the clock signal to this pin when the external clock is selected as the timing source. using a ceramic oscillator or an external clock can be selected with oki's analizing and editing tool. pdwn pin 1 2 3 4 5 6 8 i the lsi remains in standby mode while this pin is being held "l". xt 7 o wired to the ceramic oscillator when a ceramic oscillator is in use. when the external clock is in use, keep this pin open.
4/22 MSM9831-XXX ? semiconductor absolute maximum ratings recommended operating conditions parameter symbol condition rating unit v dd v in t stg power supply voltage input voltage storage temperature ta = 25c C0.3 to +7.0 C0.3 to v dd +0.3 C55 to +150 v v c (gnd=0v) parameter (gnd=0v) symbol condition range unit power supply voltage v dd with a ceramic osc. ( note) 2.5 to 5.5 v master clock frequency typ. 4.096 max. 4.5 min. 3.5 f osc with a ceramic osc. mhz with the external clock f osc =3.5 mhz to 4.5 mhz 2.0 to 5.5 v with the external clock f osc =3.5 mhz to 14.5 mhz 2.7 to 5.5 v with the external clock f osc =3.5 mhz to 17 mhz 3.0 to 5.5 v operating temperature t op C40 to +85 c 4.096 4.5 3.5 with the external clock v dd =2.0 v to 5.5 v mhz 14.5 3.5 with the external clock v dd =2.7 v to 5.5 v mhz 17 3.5 with the external clock v dd =3.0 v to 5.5 v mhz (note) v dd =2.5 v to 5.5 v note: a crystal that is usable in this lsi is described in "functional description" of this document. if you want to use a different crystal, it is recommended to evaluate the crystal before using it.
5/22 MSM9831-XXX ? semiconductor electrical characteristics dc characteristics parameter "h" input voltage (v dd =2.0 to 5.0 v, gnd=0 v, f osc =4.096 mhz, ta=C40 to +85c, unless otherwise specified) symbol condition min. typ. max. unit v ih f osc =14.5 mhz or less v dd 0.8 v "h" input current i ih v ih =v dd 10 m a "l" input current i il v il =gnd C10 m a dynamic supply current i dd aout output current is excluded 1.2 3.0 ma standby supply current i ds ta=C40c to +70c 10 m a ta=C40c to +85c 50 m a aout output current i aout v dd =2.0 v to 5.5 v 0.4 8.9 ma (v dd =2.7 v to 5.5 v) f osc =4.5 mhz or less (v dd =2.0 v to 5.5 v) v dd 0.85 v f osc >14.5 mhz (v dd =3.0 v to 5.5 v) "l" input voltage v il v dd 0.2 v f osc =4.5 mhz or less (v dd =2.0 v to 5.5 v) v dd 0.15 v f osc >14.5 mhz (v dd =3.0 v to 5.5 v) f osc =14.5 mhz or less (v dd =2.7 v to 5.5 v) v dd =5.5 v f osc =4.096 mhz 0.4 1.0 ma v dd =3.0 v f osc =4.096 mhz 0.2 0.7 ma v dd =2.0 v f osc =4.096 mhz 12.0 ma v dd =5.5 v f osc =16 mhz 4.0 ma v dd =3.0 v f osc =16 mhz 2.8 ma v dd =2.0 v f osc =16 mhz v dd =5.5 v 3.8 6.0 8.9 ma v dd =2.0 v 0.4 1.0 1.9 ma at maximum output current
6/22 MSM9831-XXX ? semiconductor ac characteristics parameter master clock duty cycle (oscillation frequency at f osc =4.096 mhz, v dd =2.0 to 5.0 v, gnd=0 v, ta=C40 to +85c) symbol condition min. typ. max. unit f duty 405060% time before reset input after power on t rst 10 m s pdwn hold time after reset input t pdh 10 m s da converter shifting time (pop-noise canceller working time) t dar , t daf 606468ms pdwn - st setup time t pdss 1 m s st - pi setup time t sps 1 m s pi pulse width t pw 0.35 2000 m s pi cycle time t pc 0.7 4000 m s st - pi hold time t sph 1 m s st -aout setup time t sas f sam =8.0 khz 1050 m s phrase stop time t dps f sam =8.0 khz 700 m s silence in-between phrases t bln f sam =8.0 khz 700 m s stop st pulse width t ssw 0.35 2000 m s phrase st -phrase st pulse interval t pp f sam =8.0 khz 1050 m s phrase st -stop st pulse interval t ps f sam =8.0 khz 1050 m s stop st -phrase st pulse interval t sp f sam =8.0 khz 500 m s *1 *2 *2 *2 *2 *2 *2 sampling freqnency f sam 3.9 28.0 khz *3 *1 proportional to the period of oscillation frequency (f osc ). *2 proportional to the period of sampling frequency (f sam ). *3 the sampling frequency (f sam ) is determined by the oscillation frequency (f osc ) and the frequency dividing ratio selected for each phrase.
7/22 MSM9831-XXX ? semiconductor timing diagrams 1. power-on t rst t pdh reset power down v dd pdwn st pi (i) (i) (i) note: a level input in combination of pdwn ="l", st ="l" and pi ="h" resets the lsi. after power-on, you need to do an initial reset as shown in the above chart. 2. activating the lsi and standby mode t dar t daf pdwn aout (i) (o) i aout 1 2
8/22 MSM9831-XXX ? semiconductor 3. playback 4. re-inputting the address while playback is going on pdwn (i) st (i) pi (i) aout (o) t sps t pdss t pw t pc t sph t sas st (i) pi (i) aout (o) t dps t pp t bln current phrase stops next phrase starts
9/22 MSM9831-XXX ? semiconductor 5. stop code input st (i) pi (i) aout (o) t dps t ps current phrase stops t ssw t sp
10/22 MSM9831-XXX ? semiconductor functional description 1. sampling frequency sampling frequency can be selected and setup on each phrase address. 7 sampling frequencies are available for user's choice in preparing voice data file at the pre-production stage. select sampling frequencies to satisfy f sam =3.9 to 28.0 khz obtained by frequency dividing ratios in table 1.1. table 1.1 sampling frequency sampling frequency (f osc =4.096mhz) frequency diving ratio 4.0khz f osc /1024 5.3khz f osc /768 6.4khz f osc /640 8.0khz f osc /512 10.6khz f osc /384 12.8khz f osc /320 16.0khz f osc /256 2. recording/playback time figure 2.1 below shows memory allocation of on-chip 384k bit mask rom. the mask rom is partitioned into 4 data areas: user's area, phrase control table area, phrase control area and test data area. actual memory space is the total mask rom capacity (384k bit) indicated in this document minus 6k bit. figure 2.1 memory allocation of on-chip mask rom (384k bit) phrase control table area phrase data control area test data area user's area 2k bit 2k bit 2k bit 378k bit
11/22 MSM9831-XXX ? semiconductor the playback time is obtained by dividing the memory capacity by the bit rate. the playback time for 8-bit pcm algorithm is obrained by using the following equation. memory capacity [bit] bit rate [bps] memory capacity [bit] sampling frequency [hz] 8 [bit] playback time [sec] = = (384C6) 1024 [bit] 8000 [hz] 8 [bit] playback time = = 6.0 [sec] for example, if all phrases are stored in the msm9802 at 8 khz sampling frequency, the maximum playback time is as follows. 3. playback method the msm9831 uses oki non-linear pcm algorithm. in the mid-range of waveform, oki 8-bit non-linear pcm has precision equivalent to that of 10- bit straight pcm. 4. inserting silence in addition to normal recorded sound phrases, the msm9831 allows a user to play back or insert silence (silent phrase). user can set up time length of silence from a minimum of 32ms to a maximum of 996ms in 32ms step when f osc =4.096 mhz. these time lengths are directly proportioned to the clock (f osc ) period.
12/22 MSM9831-XXX ? semiconductor 5. phrase control table because the lsi contains the phrase control table, it is possible to play back multiple phrases in succession by a single easy control operation like controlling a single regular phrase playback. up to 8 combined phrases including a silence can be registered in a single address in the phrase control table. further, you can use the maximum memory space for data storage because it is not required to have the same phrase data. to show an example, let's assume that your application needs to speak two similar sentences, "it is fine today" and "it is rainy today." the two sentences have the common words "it", "is" and "today". what you have to do is to prepare these common sound data, not in sentences but in words, and to store each combined phrase data in phrase control table as shown in table 4.1 and figure 4.1 multiple phrases can be played continuously merely by specifying a desired phrase using an x address. for an example from table 4.1, when address "01" is specified, "it is fine today" is played, and when address"02" is specified, "it is rainy" is played. phrase control table, a silence can be inserted without using the user's area. minimum time for silence 32 ms maximum time for silence 992 ms time unit for setting up silence 32 ms table 4.1 matrix of the phrase control table no. x-address (hex) y-address (up to 8 phrases) sound data 101 202 303 30 1e 31 1f [04] silence [02] [01] [03] [05] silence [02] [01] [03] [09] [04] [02] [01] [06] [05] [0a] [03] it is (silence) fine today. it is (silence) rainy today. it is fine becoming cloudy, rainy in some areas today.
13/22 MSM9831-XXX ? semiconductor figure 4.1 phrase combination matrix for phrase control table no. y-address phrase 101 202 303 505 606 707 808 909 10 0a 31 1f phrase data registration area 1 [01] 2 [02] 3 silence (64ms) 4 [05] 5 [03] 6 7 8 phrase control table area phrase addigned n silence time length 1 32 ms 2 64 ms 31 992 ms setting of silence time length (32ms n) no. x-address 101 202 303 404 505 606 707 808 909 31 1f the silence time lengths are directly proportional to the clock (f osc ) period. 404 it is today rainy cloudy snowy occasionally becoming in some areas fine it is rainy today
14/22 MSM9831-XXX ? semiconductor figure 5.2 playback timing when using phrase control data aout (o) playback phrase 01 playback phrase 02 playback phrase 03 playback phrase 01 enter into stand-by mode reset power down current phrase stops playback stops enter into stand-by mode power down phrase 01 selected phrase 02 selected phrase 03 selected phrase 01 selected stop code pi (i) st (i) pdwn (i) v dd it is fine today it is rainy today it is fine becoming cloudy, rainy in some areas today. it is fine today
15/22 MSM9831-XXX ? semiconductor 6. oscillation, clock signal input 6-1 using a ceramic oscillator figure 6.1 shows an oscillation circuit diagram using a ceramic oscillator. (select use a ceramic oscillator option on selecting options) figure 6.1 oscillation circuit with an external ceramic oscillator the optimal load capacities when connecting ceramic oscillators from murata mfg., kyocera corporation, and tdk corporation are shown below for reference. xt xt c1 c2 external capacitor type msm9831 xt xt internal ca p acitor t yp e msm9831 ceramic oscillator optimal load capacity supply voltage range (v) operating temperature rnage (c) maker freq (mhz) c 1 (pf) c 2 (pf) csa4.00mg 4.0 30 30 3.0 to 5.5 C40 to +85 murata mfg. type csa4.00mgw built in built in csac4.00mgc 30 30 cstcc4.00mg built in built in csa4.00mgu 30 30 cst4.00mgwu built in built in csac4.00mgcu 30 30 cstcc4.00mgu built in built in 2.7 to 5.5 2.6 to 5.5 fcr4.0m5 33 33 fcr4.0mc5 built in built in 2.5 to 5.5 2.5 to 5.5 C40 to +85 ccr4.0mc3 kbr-4.0msa 33 33 kbr-4.0msb built in built in 2.5 to 5.5 C20 to +80 kbr-4.0mkc kbr-4.0mkd 33 33 kbr-4.0mks built in built in pbrc4.00a 33 33 pbrc4.00b 4.0 4.0 tdk corporation kyocera corporation
16/22 MSM9831-XXX ? semiconductor 6-2 using external clock input figure 6.2 shows an oscillation circuit diagram using an external clock input. figure 6.2 oscillation circuit using an external clock input xt xt open external clock, etc. as the timing source
17/22 MSM9831-XXX ? semiconductor 7. low-pass filter in this ic, all voice outputs are through the built-in low-pass filter (lpf). figure 7.1 and table 7.1 show the lpf frequency characteristics and lpf cutoff frequency respectively. the frequency characteristics and cutoff frequencies are directly proportional to sampling frequencies. only the voice output through lpf in this ic is enabled. figure 7.1 lpf frequency characteristics (f sam =8 khz) table 7.1 lpf cutoff frequency 0 C20 C40 C60 [db] 100 1k 10k C10 10 C30 C50 C80 C70 20 [ hz ] 10 sampling frequency (khz) cutoff frequency (khz) (f sam ) (f cut ) 1.2 1.6 4.0 5.3 2.0 6.4 2.5 8.0 3.2 10.6 4.0 12.8 5.0 16.0
18/22 MSM9831-XXX ? semiconductor connecting the msm9831 to speaker driving amplifier the msm9831 uses a current output type d/a converter. when the msm9831 is connected to a voltage input type amplifier, it is required to convert the voice signal that is output as "change of current" into the voice signal that is output as "change of voltage". the connection between the msm9831 and msc1157 (oki speaker driving amplifier) when a resistor is used for the above conversion is described below. circuit connection example 1: when v dd =5.0v and the amplitude of ain of the msc1157 is 2.5v p-p p1.2 p1.1 p1.0 st pi pdwn aout v dd +5v 0.1 m f 500 w 47nf +5v 0.1 m f 10 m f + C + C 4.7 m f + C xt xt msm9831 gnd mcu ain v cc sp sp msc1157 vr stby gnd sel 4.096mhz ( ceramic oscillation is selected ) circuit connection example 2: when v dd =3.0v and the amplitude of ain of the msc1157 is 1.5v p-p p1.2 p1.1 p1.0 st pi pdwn aout v dd +3v 0.1 m f 620 w 47nf +3v 0.1 m f 10 m f + C + C 4.7 m f + C xt msm9831 gnd mcu ain v cc sp sp msc1157 vr stby gnd sel ( external clock input is selected ) clk xt
19/22 MSM9831-XXX ? semiconductor use a resistor with an appropriate value (r l ) considering the output voltage (reference the drawing below). 0 1 2 3 4 5 6 012345 r l =500 w r l =200 w maximum output current output current at waveform center vaout (v) iaout (ma) r l =5k w playback standby power down power down time shift to standby (2) voice waveform is distorted and pop noises are generated when r l =5k w * when r l is too high playback standby power down power down time shift to standby (1) normal voice waveform is obtained when r l =200 w relationship between aout pin voltage and aout output current at v dd =5v
20/22 MSM9831-XXX ? semiconductor d/a converter output current 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 0 1 2 3 4 5 6 supply voltege (v) aout outptu current (ma) relationship between supply voltage and aout output current (ta=25c, vaout=v dd , pcm at maximum) C40 0 1 2 3 4 5 6 ambient temperature (c) aout outptu current (ma) relationship between ambient temperature and aout output current (vaout=v dd , pcm at maximum) C20 0 20 40 60 80 100 v dd =5v v dd =3v 0.0 0 aout pin voltage ( v ) aout outptu current (ma) 1 2 3 4 5 6 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 relationship between aout pin voltage and aout output current (ta=25c, v dd =5.0v, pcm at maximum)
21/22 MSM9831-XXX ? semiconductor notes 1. internal converter circuit the msm9831 has not employed a voltage output type d/a converter but a current output type d/a converter. therefore, the voice output circuit of the msm9831 is different from that of the msm6650 family product which has employed a voltage output type d/a converter. the voice output circuit of the msm9831 also is different from that of the msm9800 family product because the msm9831 has employed a current flowing-in type d/a converter and the msm9800 family product has employed a current flowing-out type d/a converter. (see the table below) msm6650 family msm9800 family msm9831 product name d/a converter circuit type d/a converter output circuit voltage output type current output (flowing-out) type p-mos open drain current output (flowing-in) type n-mos open drain circuit connection between the msm9831 and amplifier ic v dd aout gnd d/a converter msm9831 current flowing direction amp resistor for conversion from current to voltage v dd aout gnd d/a converter current flowing direction amp resistor for conversion from current to voltage msm9800 family circuit connection between the msm9800 family product and amplifier ic 2. ceramic oscillator a crystal that is usable in this lsi is described in "functional description" of this document. if you want to use another crystal, it is recommended to evaluate the crystal before using it.
22/22 MSM9831-XXX ? semiconductor (unit : mm) package dimensions notes for mounting the surface mount type package the sop, qfp, tsop, tqfp, lqfp, soj, qfj (plcc), shp, and bga are surface mount type packages, which are very susceptible to heat in reflow mounting and humidity absorbed in storage. therefore, before you perform reflow mounting, contact okis responsible sales person on the product name, package name, pin number, package code and desired mounting conditions (reflow method, temperature and times). sop8-p-250-1.27-k package material lead frame material pin treatment solder plate thickness package weight (g) epoxy resin 42 alloy solder plating 5 m m or more 0.10 typ. mirror finish
notice 1. the information contained herein can change without notice owing to product and/or technical improvements. before using the product, please make sure that the information being referred to is up-to-date. 2. the outline of action and examples for application circuits described herein have been chosen as an explanation for the standard action and performance of the product. when planning to use the product, please ensure that the external conditions are reflected in the actual circuit, assembly, and program designs. 3. when designing your product, please use our product below the specified maximum ratings and within the specified operating ranges including, but not limited to, operating voltage, power dissipation, and operating temperature. 4. oki assumes no responsibility or liability whatsoever for any failure or unusual or unexpected operation resulting from misuse, neglect, improper installation, repair, alteration or accident, improper handling, or unusual physical or electrical stress including, but not limited to, exposure to parameters beyond the specified maximum ratings or operation outside the specified operating range. 5. neither indemnity against nor license of a third partys industrial and intellectual property right, etc. is granted by us in connection with the use of the product and/or the information and drawings contained herein. no responsibility is assumed by us for any infringement of a third partys right which may result from the use thereof. 6. the products listed in this document are intended for use in general electronics equipment for commercial applications (e.g., office automation, communication equipment, measurement equipment, consumer electronics, etc.). these products are not authorized for use in any system or application that requires special or enhanced quality and reliability characteristics nor in any system or application where the failure of such system or application may result in the loss or damage of property, or death or injury to humans. such applications include, but are not limited to, traffic and automotive equipment, safety devices, aerospace equipment, nuclear power control, medical equipment, and life-support systems. 7. certain products in this document may need government approval before they can be exported to particular countries. the purchaser assumes the responsibility of determining the legality of export of these products and will take appropriate and necessary steps at their own expense for these. 8. no part of the contents contained herein may be reprinted or reproduced without our prior permission. 9. ms-dos is a registered trademark of microsoft corporation. copyright 1999 oki electric industry co., ltd. printed in japan e2y0002-29-62

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