HT85XXXGreen VoiceTMSelection TableThe HT85XXX series provides various voice capacity as shown below:Part No.HT85036HT85048HT85072HT85096ROM 768Kb 1024Kb 1536Kb 2048Kb Voice Length36sec48sec72sec96secNote:The voice capacity is based on a sampling rate of 4-bit ADPCM 5.25kHz.*:under development.1August 24,2000General DescriptionThe HT85XXX family is a series of programma-ble speech synthesizers and tone generators de-signed for user-defined voice and melody applications.It provides various sampling rates and beats,tone levels,tempos for the speech synthesizer and melody generator.The HT85XXX series has a built-in high quality,currenttypeD/Aoutputswith16levelsofvolume control.The user ¢s commands enable the user toprogram the powerful custom function such as to build-in a tiny controller.The Green Voice pro-vides various operational functions similar to arithmetic operation,logic operation,branch de-cision,random counter,and a programmable timer.The Green Voice series are suitable for versatilevoiceandsoundeffect applications.The HT85XXX Green Voice series is Easy For-mat TM supported.Features·Operating voltage:2.4V~5.0V ·Driver speaker (32W )V DD =4.5V,I DD =90mA·Programmable tone melody generator ·ADPCM,m -law PCM,PCM synthesis ·Wide range of sampling rate for voice synthesis·Minimum sampling rate step:100Hz ·Voice melody mixed output·Programmable 2channels of melody mixed output·Programmable 2channels of voice mixed output·13kinds of melody beats·5octaves of tone level and 18tempos ·16levels of digital volume control ·Eight programmable I/O pins ·Four programmable input pins·Provides 36sec to 96sec of voice capacity ·Timer controller ·Voice fill-in function·Powerful user-definedfunctions ·Power-on initial setting ·28-pin SKDIP packageGreen VoiceTMand Easy FormatTMare trademark of Grow With Me,Inc .Block DiagramPin Assignment2August24,2000Pad AssignmentHT85036,HT85048,HT85072,HT85096Chip size:2315´2875(m m)2*The IC substrate should be connected to VSS in the PCB layout artwork.Pad CoordinatesHT85036,HT85048,HT85072,HT85096Unit:m mPad No.X Y Pad No.X Y1-785.05-216.5012178.65-1172.502-785.05-377.1013355.15-1172.503-785.05-533.8514489.95-1172.504-785.05-671.5515662.95-1172.505-970.35-761.0516789.70-1172.506-973.35-910.1017962.20-1172.507-577.70-1172.5018961.30-861.108-443.35-1172.5019958.10-634.659-226.85-1172.5020956.30-505.1510-132.35-1172.5021960.96-192.931144.15-1172.503August24,2000Pin DescriptionPin No.Pin Name I/O InternalConnection Description1,2,8,24~28NC¾¾No connection3,4,5PP0,PDA,PP1O¾Green Voice Speaker control pin6VDD¾¾Positive power supply7AUD O PMOSOpen Drain Audio output for driving an external transistor15~9PB1~PB7I/O Pull-highor CMOS Bidirectional I/O pinsCan be optioned as trigger inputs or LED outputs16PB0I/O Pull-highor CMOS Bidirectional I/O pinsCan be optioned as CDS interface with internal Schmitt trigger input20~17PA0~PA3I Wake-upPull-high Trigger inputsCan also be configured as wake-up inputs21,22VSS¾¾Negative power supply,ground23OSC I¾Built-in RC oscillatorAn oscillator resistor is connected between OSC and VSS Absolute Maximum RatingsSupply Voltage.................................-0.3V to6V Storage Temperature.................-50°C to125°C Input Voltage.................V SS-0.3V to V DD+0.3V Operating Temperature..............-20°C to70°C Note:These are stress ratings only.Stresses exceeding the range specified under²Absolute Maxi-mum Ratings²may cause substantial damage to the device.Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged expo-sure to extreme conditions may affect device reliability.Electrical Characteristics Ta=25°CSymbol ParameterTest ConditionsMin.Typ.Max.Unit V DD ConditionsV DD Operating Voltage¾¾ 2.4¾ 5.2VI STB Standby Current3V No load,system HALT¾13m A I DD Operating Current3V No load,f SYS=4MHz¾58mA I OL PB0~PB7Sink Current3V V OL=0.3V46¾mA I O Max.AUD Output Current3V V OH=0.6V-1.5-2¾mA f SYS System Frequency3V R OSC=240k W 3.6 4.0 4.4MHz4August24,2000Functional DescriptionThe Green Voice series is a series of program-mable speech synthesizers and melody genera-tors.It provides various sampling rates and beats,tone levels,tempos for speech synthe-sizer and melody generator.For voice synthe-sizer,the Green Voice provides8-bit PCM,6-bit m-law PCM and4-bit ADPCM synthesis.In HT85XXX series,a mixed output of two chan-nels PCM synthesis is allowed but only one channel ADPCM synthesis is allowed.For mel-ody generator,the Green Voice supports a tone melody and PCM melody generator and two channels mixed output for the whole series. The Green Voice series build-in8programma-ble I/O pins and4programmable input pins along with powerful user¢s command.The user¢s instructions are employed to develop new and customized functions for a wide vari-ety of innovative applications.Speech and melody analysisThe speech and melody sources of the Green Voice can be recorded and edited from the PC sound card and media tools.Holtek¢s CAD tools first load a speech source file as.WAV or.PCM format,then transfer the speech file as PCM, LOG-PCM or ADPCM format,and finally save it to the internal mask ROM by changing a layer of the mask.The PCM format generates a higher sound quality whereas the ADPCM for-mat brings about a longer recording capacity. The melody source can either be in the.MID or in the.MLD format.The.MID file is the standard format of the win-dows media tools.The.MLD file is a text for-mat.After the.MID file is compiled,the.MLD file is automatically generated.The Green Voice can support the following com-pression format of the voice.WAV and.PCM file:AD4,PCM8,m-law PCM.Current type D/A outputThe HT85XXX series supply high accuracy cur-rent type D/A output pins for audio output.The output volume is changeable from0to15digi-tal levels by writing a value to the VOLUME registers.The D/A pins are PMOS open drain structure and ouput synthesized signals for driving a speaker through an external NPN transistor when the chip is active.However,it becomes floating when the chip is in the standby state.An8050type transistor withh FE=150is recommended for the output driverof the D/A output pin.Melody/Tone generatorThe HT85XXX family has a built-in mel-ody/tone generator.The generator can generate 13different kinds of melody beats,5octaves of tone level,18tempos,and2channels mixed output.Of these components,the melody tempo is changeable and generates sound effects by writing a control value to the TEMPO register.The chip provides the following18tempos,13 beats,and5octaves for user¢s programming.·18tempos(Beats/Min.)68788293100105109114119125132139147156179192227310·13beats12411218161413122334143322,,,,,,,,,,,,·5octavesC1~B1,C2~B2,C3~B3,C4~B4,C5~B55August24,2000PCM/ADPCM synthesizerThe HT85XXX family contains a PCM and ADPCM synthesizer.The synthesizer offers a wide range of sampling rates from4kHz to 24kHz for PCM synthesis and4kHz to16kHz for ADPCM synthesis.The sampling rate of the synthesizer can be changed by writing a control value to the sampling rate register.It also sup-ports a small variety of100Hz.For a higher performance sound quality,the PCM coding is required.But for a longer recording capacity, the ADPCM coding is recommended.The capability of the voice sampling rate for various voice compression format.f OSC PCM8m-lawPCM AD4 4M12kHz11kHz8kHz5M15kHz14kHz10kHz6M18kHz16kHz12kHz8M24kHz22kHz16kHzOscillator configurationThe HT85XXX series provides an RC oscillator for the system clock.The system oscillator stops in the standby state so as to reduce power consumption.For the oscillator circuit,an external resistor is required between OSC and VSS.The oscillator frequency is typically4MHz for an external re-sistor of240k W.The RC type of oscillator offers the most cost-effective solution,although the frequency of the oscillation may vary with tem-perature and the chip itself due to process vari-ation.R OSCf OSC HT84EVA HT84P00IC4M180k W240k W240k W5M150k W210k W210k W6M120k W180k W180k W8M91k W150k W150k WMask optionsThe following options have to be defined to en-sure a proper system functioning:·Pull-high resistor:33k W/98k W(3V)·Key debounce time:0ms~255ms(f OSC=4MHz)6August24,2000Application CircuitsBasic applicationHT85XXX7August 24,20008August24,20009August24,2000Note:In Easy64mode,only falling edge trigger can be used in input stateIn Easy64mode,the path command²TRn?L:pathname²and²TRn?H:pathname²are invalid10August24,2000HT85XXX11August 24,2000Copyright Ó2000by HOLTEK SEMICONDUCTOR INC.The information appearing in this Data Sheet is believed to be accurate at the time of publication.However,Holtek assumes no responsibility arising from the use of the specifications described.The applications mentioned herein are used solely for the purpose of illustration and Holtek makes no warranty or representation that such applications will be suitable without further modification,nor recommends the use of its products for application that may pres-ent a risk to human life due to malfunction or otherwise.Holtek reserves the right to alter its products without prior notification.For the most up-to-date information,please visit our web site at .Holtek Semiconductor Inc.(Headquarters)No.3Creation Rd.II,Science-based Industrial Park,Hsinchu,Taiwan,R.O.C.Tel:886-3-563-1999Fax:886-3-563-1189Holtek Semiconductor Inc.(Taipei Office)5F,No.576,Sec.7Chung Hsiao E.Rd.,Taipei,Taiwan,R.O.C.Tel:886-2-2782-9635Fax:886-2-2782-9636Fax:886-2-2782-7128(International sales hotline)Holtek Semiconductor (Hong Kong)Ltd.RM.711,Tower 2,Cheung Sha Wan Plaza,833Cheung Sha Wan Rd.,Kowloon,Hong Kong Tel:852-2-745-8288Fax:852-2-742-8657。
