MSM6378A | DigiCamel IC Datasheet

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OTP ROM Built-in Voice Synthesis tC SS — GENERAL DESCRIPTION The MSM6378A/6379 is an ADPCM voice synthesis IC with a built-in one-time programmable {OTP) ROM. The MSM6378A/6379 reproduces the voice data, which the user has analyzed and recorded using the "ANAWRITER" for an exclusive use, through a speaker driving AMP and speaker. The MSM6378A /6379 can be used in voice cards, small-quantity multi-product toy line- ups, and personal use devices. FEATURES | * MSM6379 : Built-in 512Kbit OTP ROM (500Kbits for recording) | * MSM6378A : Built-in 256Kbit OTP ROM (244Kbits for recording) * 4-bit straight ADPCM method * Built-in low pass filter * Built-in 12-bit DA converter * Data write time : MSM6379 16sec MSM6378A 8 sec * Oscillation system : R/C oscillation or external clock input (ceramic oscillation is available.) * Oscillation frequency + 64 to 256kHz * Sampling, frequency : 4 to 16kHz (original oscillation frequency /16) * Activation : Power on start or reactivation after one shot output * Voice output : one-shot or repeat © Low current consumption © Largest voice time : MSM6379 (32.0 sec (4kHz sampling) MSM6378A 15.6 sec (4kHz sampling) * Number of phrases that can be output: One phrase only * Power supply voltage : DAOpin 2.4to5.5V AOUT pin = 2.7 to 5.5V (fsam S$ 8kHz) 3.5 to 5.5V (fsam 2 10kHz) * Package : 16-pin plastic DIP (DIP16-P-300-W1) {Product name: MSM6378ARS/MSM6379RS) Chip __Mes7eA eso ANAWRITERMK2 | . le) ae __ ANAWRITER MK6 _ fo) Oo . AR76-202/AR203 po OT fe) 161

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OKI Semiconductor MSM6378A/6379 PIN CONFIGURATION (TOP VIEW) Voo U [16] GND oscs [2] e) [15] AOUT osce GB] [14] 0A osc: [4 [13] REP tc 12} Test scK ii] wit Pom =([7) [10] SA | Oo Eau {8} [9] Ver 16-Pin Plastic DIP 163

msmes7eaes79 OK Semiconductor PIN DESCRIPTION i Symbol [Type | Description _ REP i Repeat/one-shot selection pin. In power-on or input to SA pin, one-shot is | output when REP="L" and repeated voices are output when REP="H’. i The voice is not output so long as this pin is merely set to "H” level. ! — This pin does not include a pull-down resistor. ee SA | Pin to be reactivated after one-shot output. When a single pulse is applied to ‘SA pin, the IC is reactivated on the falling edge. This pin includes a pull-down __ _. resistor. ee wik 1 Interface pin for the ANAWRITER for exclusive use. Set to "L" or “open” in . playback. This pin includes a pull-down resistor. | POM | 1 | Sameas above WR) | _SCK || Same as above (W/R). ee | a: Same as above (W/R). ee ee \\ fOL_ |__| Interface pin for the ANAWRITER for exclusive use. Set to “open” in playback i TEST I Internal circuit test pin. Set to"L’ or ‘open’ in playback. This pin includes a _ ae pull-down resistor. ee osc1_ |__| Oscillation RC connection pin or external clock input pin, . 08C2 0 Oscillation RC connection pin: : Sat to open to input external clock through the OSC1 pin. _ .0sc3_ |__| Same as above (0502). a DAO Oo DAconverter output pin, _ . Vpp — Power voltage pin for writing to the built-in OTP. Set to Vep = Voo or ‘open in Voo _ Power pin. Insert a bypass capacitor of 0.1):F or more between this pin and ee ne the GND pin. _ GND = Ground pin. a _ 164

| OKI Semiconductor MSM6378A/6379 i ABSOLUTE MAXIMUM RATINGS | Parameter | Symbol | Condition | Rating | «Unit Power SupplyVotage | Moo | Tas2e | oat |v Input Volage | Mn | Ta 28°C | 0.3 t0VonA08 | Y | Storage Temperature Tst¢, _ 85 to +125 °C RECOMMENDED OPERATING CONDITIONS | __ __ Parameter Symbol _ Condition Range Unit ~ DAO pin 2.4 to 5.5 Power Supply Voltage Voo GND - ov AQUT pin 2.7 to 5.5 (Is“8 kHz) | -V — a ff Sige Hy Operating Temperature Top a __ -10 to +70 So Oscillation Frequency [tose __ | = 64 to 256 kHz ELECTRICAL CHARACTERISTICS (Vpp=Vpp at playback) DC Characteristics (Vpp=4.5 to 5.5V, GNO=OV, Ta=0 to +70°C) Parameter Goncition | Min | Typ | Max | Uni ‘H'Inputvotage || «BR o| | Voo0.t] _L' Input Voltage Vit _ 0.1 = _0.2xVpp|_V Applies to CE, SCK, PEM, | H’ Input Ci tt i 20 =- 400 iA _ | SAW and TEST pins oS Applies to OSC1 and | | “H’ Input Ci it 2 | - — | 10 iA input Current NH2 REP pins | a “Letmputcurrent Te = j=) Operation Current Consumption] loo | — | 7 20 | ma Standby Current Consumption los | — | O1 | 10) | yA DA Output Relative Accuracy | |Voae!_ | ___—Noload 40} mv CA OutputImpedance =| Ronn | 35 | kQ LPF Minimum Driving Resistance) — Raour - _ kQ 168 |

OKI Semiconductor MSM6378A/6379 TIMING DIAGRAMS 1. Reactivation after One-shot Output Voo.Yen REPL) —§ Aa sm ee A A AOUTDRO(O) tose Nour Nor Jose tour No, ee ee toru toru 2. One-shot after Repeat Voor i rr SA) —— AOUT.DAO(O) a \\/ \\ tose tour tort, tour tow : ae ea a at tt ou tow 3. Repeat during Voice Output VooNer _f . REP(!) ~ Sally t oe Pr ‘OUT,DAD(O) Tose tour ton, Nose Sour tor. tou tow Noeu Note: When REP pin is merely set to "H” level, the voice is not output. 4. Reactivation during Voice Output Voo-Vee SO REP(I) SM AOUT,DAD(0) / / \\ tose B tose four ton. al 1 he hat tint tory Ne ii ise Now Note; When SA pin goes to "H" level during playback, voice is stopped and a noise is output. 167

MSM6378A/6379 OKE Semiconductor i FUNCTIONAL DESCRIPTION | 1. Number of Phrases One word only. 2. Relation among External R andC, Original Oscillation Frequency, and Voice Output Time CipF) | AUK) | R2(kO) | fosc | fsam | four | tours(sec) | toura{sec) | av | 6v | av | SV 3v | SV | (kHz) (kHz) | (kHz) | MSM637BA | MSM6379__ | 100 | 100 | 200 | 200 [565 | Gos| 64 4 15 15.6 320 | 100 | 100 | 200 | 200/345 | a65| 96 | 6 10.4 213 | too | 100 | 200 | 200/23 | 25 | 128 | 8B 78 160 | 100 | 100 | 200 | 200/165 | 18 | 160 | to | 36 | 62 128 | 100 | 100 | 200} 200/125 | 14 | 192 | 12 | 44 | 52 106 100 | 100 | 200 | 200, 95 | 11 | 224 | 14 st | 45 - 94 \\ 100 | 100 | 200 200, 75 | 9 | 256 | 16 58 39 80 | * tours » —,24ekoit__ kx [MsMe3780/6379| bit x fsa 9 OSC1 [re | o0sc2 ‘oure= abit fea The values of C, R1, and R2 for the above table are for the MSM6378A 16-pin DIP. The oscillation frequency fluctuates with an external resistance and floating capacity. Therefore, since the oscillation frequency fluctuates when the board wiring and packagesare different, determine the constantafter check with monitoring fosc at OSC3 pin with reference to the above table. 3. Ceramic Oscillator (fosc=256KHz} » Figure 3-1 shows an external circuit that used the ceramic oscillator CSB256D made by Murata MEG. * Figure 3-2 shows an external circuit that used the ceremic oscillator KBR256B made by Kyocera Corporation. fosc1 ——_osc2 Osc 1 Osc 2 1MQ ——40h— a 7frorr Avon 7] p0ore Borer Figure 3-1 Ceramic Oscillator (CSB256D) Figure 3-2 Ceramic Oscillator (KBR-256B) Connection Circuit Connection Circuit 168

OKI Semiconductor MSM6378A/6379 4. Pop Noise Prevention To prevent generation of pop noise before and after voice output, the MSM6378A /6379 contains a 12Kbit offset data area in the built-in OTP. The ANAWRITER for exclusive use automatically reads the offset data into the MSM6378A /6379. 5. Activation The MSM6378A /6379 is activated as soon as the power is turned on (power-on start function). To reactivate from stand-by mode, apply a pulse on the SA pin, and the voice is again output. ‘Upper offset Y Prat ha t 4Koits ADPCM “ep 244Kbits, SO0Koits: r Data Lower offset |. gaits 6. Repeat The MSM6378A /6379 repeats when the REP pin is set to"H" level. However, the voice is not output when the REP pin is merely set to "H" level. 7. Standby Mode When the REP pin isset to"L" level, the MSM6378A /6379 outputs one-shot voice and entersstandby modeafter the power is turned on ora pulseis applied totheSA pin. While instandby mode, internal oscillation stops and the OSC3 pin is set to "H" level. 8. Voice Output Pin The MSM63784 /6379 has two voice output pins. The DAO pinis for internal DA converter output, and the AOUT pin is for DAO output via the LPF. 9, LPF Characteristic The LPF cut-off frequency (fcur) is always proportional to original oscillation frequency. The following figure shows the LPF characteristic curve at 8kHz sampling frequency (with the original oscillation frequency set to 128kKHz). 169 |

MSM6378A/6379 OKI Semiconductor fosc (kHz) fsam (kHz}} four (kHz) 2 4 6 8 10 (kHz) seat [Mh tea actA kd ————— ae 4 4 Approx. 1.5 i 4 H ! H 128 «| «== 8 ‘| Approx. 29 0 ee -*, > a) eee eines een © Ae aan 192 12 Pop 3 E 224 4 Approx. 5.1 an en 256 | 16 | Approx. 5.8 La 10. Pop Noise of Low-pass Filter Output Although the MSM6378A /6379 hasa built-in pop noise suppression circuit, the voltage ofthe circled Portion in the figure below may bechanged abruptly by approximately 0.7 V when selecting the low- pass filter output and may generate a "pop" sound. Standby transition ‘Standby transition period period Pop Noise of Low-pass Filter Output When connecting a diode at the output from AOQUT, the "pop" sound can be reduced. The following figure shows its circuit. von {say Pop Noise Suppression Circuit 170

OKI Semiconductor MSM6378A/6379 APPLICATION CIRCUITS 1. Playback

1.1 When Standard AMP is used

= BV [1 Yoo GND 16} c (Zlosca aout | > (| yy A -faoser 2 REPITG} 02 | 4 ' —felsck 2 wali | [a leat Vol 5} | Note: The capacitor connected to the SA pin contributes to noise margin in the case of SA being “open”.

1.2 Use of MSC1191 as AMP

{T1Vo0 eno {6} > ]vr bin [8] O0.01pF ‘t | teloscs sour iy Glan sw | MW o 8 G © ay Gosce @ vao lia | ar greed —W—f]osct 3 REP Igo {4|ano vie BH sce 2 whit} [7] Pom sai}—o°o+ | (Beau Vre fn } (O.1uF O.AuF | Note: The MSC1191 is the most suitable amplifier to drive a speaker for voice ICs. When the MSM6378A terminates the playback of voice data, the MSC1191 is also put into power save mode automatically. 171

MSM6378A/6379 OKI Semiconductor 2. Example of Write Circuit (Equivalent to the playback circuit) {[ Es ON: During playback = OFF: During writing, Te t Voo GNo {16} ait tzfoscs our is} > ff ! ait Cajosce & oao fia) | t {Zlosct g rep {13} Voo or GND | [ (Sle 2 rest ii) | felscxk 2 wali j (Z|PoM SA [10] (| equ Vee {31 ] b 4 | TOANAWRITER: During witng Voo OSC1 GE SCK POM EOL vp WA GND BLT ANAWRITER interface pins Note: Be careful about noise margin for input pins that are open during playback. 172 i

Product Information

MSM6378A specifications and overview.

Summary

OTP ROM Built-in Voice Synthesis IC

Description

OTP ROM Built-in Voice Synthesis IC

Source title MSM6378A Datasheet(PDF) - OKI electronic componets

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