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ht81xxx easyvoice tm speech selection table part no. mask HT81003 ht81006 ht81009 ht81012 ht81018 otp ht81r03 ht81r09 ht81r18 ht81r36 voice capacity 3 sec 6 sec 9 sec 12 sec 18 sec 36 sec note: the voice capacity is calculated based on 5khz sampling rate. for 3-second capacity HT81003/ht81r03 devices, refer to the its relevant data sheet. rev. 1.50 1 november 21, 2006 features operating voltage: 2.4v~5v directly drives an external transistor pwm function directly driver speaker low standby current (1 a typ. for v dd =3v) minimal external components 240 notes table rom for key functions programmable silence length and end-pulse width (minimal end-pulse width is 1.3ms at 8khz sampling rate) controllable volume flag1 options end-pulse output 3hz, 3hzb flash 6hz, 6hzb flash busy output off flag2 options 3hz flash 6hz flash busy output off 6 keys (directed) 8 keys (matrix key) key options sequential/directed repeat (key2~key6) stop key (key6) key debounce time: 1.2ms, 22ms, 45ms (based on a 8khz sampling rate) one shot/normal pull-high resistance: 0, 50k , 100k , 200k section options retriggerable non-retriggerable dice form or 16-pin dip package general description the easyvoice tm is a single-chip voice synthesizer lsi . the chip when triggered drives a speaker directly or through an external transistor with a pwm output. negli- gible current is consumed in the standby state. the ht81xxx provides direct key or matrix key input and 2 programmable flag outputs. with 2.4v~5.0v power supply, a complete synthesized voice playback system can be easily built with very few external compo - nents. the customer s voice sources are recorded section by section into an internal mask rom. the instructions of section playback arrangement of each key are stored in the table rom. the key features are also programma - ble. with such a flexible structure, the easyvoice tm is excellent for versatile voice applications. applications leisure products alarm clocks alert and warning system sound effect generators easyvoice tm is a trademark of holtek semiconductor inc.
block diagram pin assignment pad assignment ht81006/ht81009 ht81xxx rev. 1.50 2 november 21, 2006

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2 3 4 chip size: 41.9 70.3 (mil) 2 * the ic substrate should be connected to vss in the pcb layout artwork.
ht81012/ht81018 ht81xxx rev. 1.50 3 november 21, 2006 2 3 4

chip size: 41.9 84.4 (mil) 2 * the ic substrate should be connected to vss in the pcb layout artwork.
ht81r09 ht81xxx rev. 1.50 4 november 21, 2006

2 3 4
chip size: 51 102.8 (mil) 2 * the ic substrate should be connected to vss in the pcb layout artwork.
ht81r18 ht81xxx rev. 1.50 5 november 21, 2006 2 3 4

chip size: 51.6 138 (mil) 2 * the ic substrate should be connected to vss in the pcb layout artwork.
ht81r36 ht81xxx rev. 1.50 6 november 21, 2006
2 3 4

chip size: 96.5 121.1 (mil) 2 * the ic substrate should be connected to vss in the pcb layout artwork.
pad coordinates ht81006/ht81009 unit: m pad no. x y pad no. x y 1 342.450 254.150 8 -70.700 672.700 2 342.450 124.150 9 44.250 672.700 3 342.450 7.700 10 191.500 639.900 4 342.450 135.000 11 377.150 646.800 5 364.900 272.350 12 373.200 376.900 6 376.670 495.876 13 377.150 107.000 7 198.050 672.700 14 401.150 200.700 ht81012/ht81018 unit: m pad no. x y pad no. x y 1 342.400 74.150 8 70.700 852.700 2 342.400 55.850 9 44.300 852.700 3 342.400 187.700 10 191.550 819.900 4 342.400 315.000 11 377.200 826.800 5 364.850 452.350 12 373.250 556.900 6 376.620 675.876 13 377.200 287.000 7 198.000 852.700 14 401.200 20.700 ht81r09 unit: m pad no. x y pad no. x y 1 477.700 173.500 9 39.850 1153.850 2 477.700 286.500 10 106.150 1153.850 3 477.700 386.500 11 428.750 1164.925 4 477.700 499.500 12 428.750 988.600 5 396.450 621.950 13 428.750 812.275 6 476.100 851.000 14 476.700 669.700 7 250.400 1153.850 15 476.700 547.424 8 150.400 1153.850 16 468.100 377.600 ht81r18 unit: m pad no. x y pad no. x y 1 485.200 621.000 9 47.350 1601.350 2 485.200 734.000 10 98.650 1601.350 3 485.200 834.000 11 437.700 1612.425 4 485.200 947.000 12 437.700 1436.100 5 403.950 1069.450 13 437.700 1259.775 6 483.600 1298.500 14 485.650 1117.200 7 257.900 1601.350 15 485.650 994.924 8 157.900 1601.350 16 477.050 825.100 ht81xxx rev. 1.50 7 november 21, 2006
ht81r36 unit: m pad no. x y pad no. x y 1 800.500 1382.800 9 712.200 1372.000 2 1071.700 1175.050 10 1053.500 1372.000 3 1066.600 1372.000 11 1053.500 1067.650 4 468.200 1361.000 12 1043.900 874.750 5 193.300 1371.600 13 941.200 1389.700 6 43.900 1371.600 14 513.175 1384.300 7 290.900 1371.700 15 210.400 1382.800 8 485.000 1372.000 16 555.200 1382.800 pin description pin no. pin name i/o internal connection description 1 i/o2 i/o nmos pull-high trigger key 6, active low/nmos output 2 i/o1 i nmos pull-high trigger key 5, active low/nmos output 3 key4 i pull-high trigger key 4, active low 4 key3 i pull-high trigger key 3, active low 5, 12 vdd positive power supply 6 osci i oscillator input pin oscillator input pin 7 key1 i pull-high trigger key 1, active low 8 key2 i pull-high trigger key 2, active low 9 out3 i/o pull-high input/nmos pull-high/transistor output/nmos output 10, 14 vss negative power supply, ground 11 out2 o cmos pwm output /cmos output 13 out1 o cmos pwm output +/cmos output 15, 16 nc no connection - ht81r36 otp device except oe , vpp ht81r09, ht81r18, ht81r36 otp device only absolute maximum ratings supply voltage ..........................v ss 0.3v to v ss +6.0v storage temperature .......................... 50 cto125 c input voltage ............................ v ss 0.3v to v dd +0.3v operating temperature .......................... 20 cto70 c note: these are stress ratings only. stresses exceeding the range specified under absolute maximum ratings may 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 exposure to extreme conditions may affect device reliability. ht81xxx rev. 1.50 8 november 21, 2006
electrical characteristics ta=25 c symbol parameter test conditions min. typ. max. unit v dd conditions v dd operating voltage 3v 2.4 3 5 v i dd operating current 3v no load 1000 1200 a i stb standby current 3v osc stop 13 a i ol1 pwm output current 3v v ol =0.2v dd 90 110 ma i oh1 3v v oh =0.8v dd 10 20 i ol2 i/o2 (tr) 3v v ol =0.1v dd 13 ma i oh2 tr output current 3v v oh =0.9v dd 1 2 ma i ol3 i/o1 (flag sink current) 3v v ol =0.1v dd 35 ma v ih h input voltage 0.8v dd v dd v v il l input voltage 0 0.2v dd v r ph input pull-high resistor 3v r=50k (option) 40 50 60 k r=100k (option) 80 100 120 r=200k (option) 160 200 240 f osc oscillating frequency 3v r=110k (f osc =2mhz) 1.6 2 2.4 mhz characteristics curves ht81xxx rev. 1.50 9 november 21, 2006 5 5 5 5 5 5 5 5 5 5 5 5 5 5
% ! & 6 ( 2
4 5 5 5 5 + 7 8 + 7 8 + 7 8 + 7 8 + 7 8 + 7 8 9 : 0 ( 2 , ; < 4
ht81xxx rev. 1.50 10 november 21, 2006 functional description the easyvoice tm is voice synthesizer with 6, 9, 12, 18 or 36-second voice capacity. a group of pre-recorded voice sections is played upon receipt of key trigger input sig - nals. two flag signals are output while playing voices. the ht81xxx voice capacity can be divided into sec - tions of arbitrary length. notice that the silence length and end-pulse width are not included in the memory. by using holtek s programming tools (ht-vds81w), the contents and arrangement of sections, as well as key features and flag output are all programmable be - fore device fabrication. the ic provides 6 direct key inputs (key1~key6), key1 can be optioned as a direct, sequential trigger key. key2~key6 can be selected as a stop or a direct key. the ic provides matrix key (key1~key8), 6 program - ming pins (key1, key2, key3, key4, i/o1 and i/o2) can be divided to 8 key that can be optioned as normal or one shot trigger. play function block diagram system oscillator the easyvoice tm has a built-in rc oscillator which re - quires only one external resistor for normal applications. the oscillator frequency is typically 2mhz for an exter - nal resistor of 150k . the required oscillator frequency may vary with different sampling rates in the process of voice programming. as a result, the value of the oscilla - tor resistor may be different with respect to different items. the oscillator is turned on when triggered by a key input. after playing, it is immediately turned off. then the chip goes into the standby state. voice rom the voice rom is originally designed to continuously re - cord the 6, 9, 12, 18 or 36-sec voice data at about 5khz sampling rate. a higher sampling rate will generate voices of better playback quality, but will shorten the to - tal recording time. on the other hand, a lower sampling rate will result in longer recording time but sacrifice the voice quality. the playback time can be significantly extended by making use of coding efficiency, silence playing, section repeating, section cascade, etc. section section is the basic element constituting the contents of the voice rom. during programming, the customers voice sources can be divided into as many sections as required. a section can be composed of a voice or an in - terval of silence. however, the silent length is not counted in the voice rom. the total number of sections included should be less than 240 due to the space limi - tation of the function table rom. the total length of the included sections is limited by the voice rom. a section, when triggered by a key input, can be played once, repeatedly or cascaded with other sections, de - pending on the key function table instructions. the following are examples of section division: in addition, a section can be set as retriggerable or non-retriggerable depending on code option. retriggerable when the currently playing section is set as retriggerable, it will stop immediately upon receipt of other key inputs. non-retriggerable when the currently playing section is selected as non-retriggerable, it will go on playing until the whole section is completed, whether or not there is a key in - put in the process of playing. 0 ! 6 6 0 = & ! # / ! 0 = ! ! & % + ,
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ht81xxx rev. 1.50 11 november 21, 2006 for a key group, some sections can be set as retriggerable and some as non-retriggerable. when a retriggerable section of a key group is playing, any key can be triggered to interrupt its playing. if it is a non-retriggerable section playing, any key interrupt is invalid. group the easyvoice tm plays groups according to the key in - put. a group can be made up of one or more sections. when a key is triggered, the corresponding group is played. for example, triggering key2 plays group 2, and so on. the same section is allowed to appear in dif - ferent groups. however, key1 can be made up of multi - ple groups when it is optioned as a sequential key. otherwise, each key is composed by one group only. key function table the voice rom sections are played according to the in - structions of the key function table. the function table contains group information and the playing order of the sections in the groups. notice that the total amount of sections included in the groups should be less than 256 which is the space limitation of the function table rom. key1 as a direct key each key is mapped to a group in the func tion table. if a key is not used, the group mapped to that key is a piece of silence. the following is an example of the function table: group 1 sec.1 + sec.2 + sec.3 + sec.4 group 2 sec.3 as illustrated in the table, voice rom is composed of 4 sections, and 5 sections for the function table. if key1 is momentarily triggered, section 1, section 2, section 3 and section 4 are played in sequence and then stopped. triggering key2 plays section 3. key1 as a sequential key when key1 is optioned as a sequential key, it can in - clude multiple groups (sub-groups) in the function ta - ble. however, key2 is used as a direct key exclusively and comprise of only one group in the function table. an example is shown below: group 1-1 sec.4 + sec.2 group 1-2 sec.1 + sec.3 : : : : group 1-n sec.2 + sec.3 group 2 sec.2 + sec.3 as indicated in the above table, key1 can be made up of sub-groups. the corresponding sub-groups is played in sequence each time key1 is triggered.
the playing sequence of sequential key1 is: group 1-1 group 1-2 group 1-3 ..... group 1-n (the last group) group 1-1 .....
reset of key1 playing sequence if a sub-group of key1 group is being played and key2 is triggered, the playing sub-group will be ter - minated, and the newly triggered key group is played in stead. the first sub-group will start playing by retriggering key1. in other words, the key1 playing sequence is reset whenever a key other than key1 is triggered (see figure 1).
sub-group selection when key1 is triggered with pulses, a desired sub-group can be selected by controlling its corre- sponding pulse number. however, the features of key1 have to be set in the following ways: sequential retriggerable minimum key debounce time ( 1.2ms, f osc =2mhz) for instance, if sub-group 1-3 is the previous playing group, sub-group 1-5 will start playing after 2 pulses are applied to key1, and so on. to make a selection of key1 sub-groups more easy, key2 should be programmed as silence. then this si - lence key has to be triggered to reset key1. by so do - ing, the playing sub-group of key1 is directly specified by the pulse number applied to key1 (see figure 2). * / ( " * / ( " * / ( " * / ( 2 1 4 * / ( " - figure 1. reset of key1 playing sequence
ht81xxx rev. 1.50 12 november 21, 2006 key6 as a stop key (by mask option) when key6 functions as a stop key, any voice output can be stopped by pressing key6. key2~key6 as a repeat key as a repeat key, the sections included can be played sequentially and repeatedly until other key input is triggered. key features key priority when six keys are triggered simultaneously, the out - put voice is determined by the key priority as shown below: key1>key2>key3>key4>key5>key6 key debounce time there are three kinds of key-in debounce time to be selected by mask option, namely, 1.2ms, 22ms, 45ms. the key debounce time varies with the value of the system frequency. pull-high resistance four kinds of key input pin pull-high resistance can be selected by mask option, namely, 0k , 50k , 100k and 200k . the resistance may vary with vdd, temperatures and the chip itself due to pro - cess variations. trigger mode the two keys can optioned as one-shot trigger mode or normal mode.
one shot when one of the six keys (key1~ key6) is pressed momentarily or held down, the group corresponding to that key will play once.
normal trigger when one of the two keys is pressed and held down, the corresponding group will continue play - ing. once the pressed key is released, the group will not stop until the included sections are all com - pleted. flag when voices are playing, both flag1 and flag2 pins are activated to output one of the following signals through code option. flag1 can be optioned as one of the following signal outputs: off, 3hzb flash, busy, 6hzb flash, 3hz, 6hz or end-pulse output flag2, on the other hand, can be set as one of the fol- lowing signal outputs: off, 3hz flash, 6hz flash, or busy output. 3hz/3hzb flash when voices are playing, flag1 as well as flag2 pin outputs a 3hz signal to drive a led. the signal is active low, 25% duty. once the voice output is termi - nated, the flag1 and flag2 pins become floating outputs. when the flag1 and the flag2 pins are optioned as 3hzb and 3hz output, they will alternately output at a 3hz rate. * / ( * / ( ( - * / ( " ( / % # * / ( " , , ( / % # 2 % 4 - figure 2. key1 sub-group selection * / ( * / ( * / ( ( - - 9 c - * a ( 9 % & ! 6
ht81xxx rev. 1.50 13 november 21, 2006 6hz/6hzb flash when voices are playing, the flag1 pin outputs a 6hz signal to drive a led. the signal is active low, 25% duty. once the voice output is terminated, the flag1 pin becomes a floating output. when the flag1 and the flag2 pins are optioned as 6hzb and 6hz outputs, they will alternately output at a 6hz rate. busy output when a voice group is playing, the outputs of both flag1 and flag2 are turned low, indicating that the chip is busy. in addition to the above-stated output signals, flag1 can also generate one of the following signals by code option:
end-pulse output when the voice output is completed, the flag1 pin outputs an active low pulse. the pulse width can be programmed depending on the customer s require - ments. the flag1 as well as flag2 pins are both floating outputs when the chip is in the standby state. volume control the function of the volume control can be set by mask option. a code is written in the function table for the pur - pose of controlling the volume of each section output af - ter the volume control function is chosen. there are two volume options, namely; full range and half range. i/o2 the i/o2 pin is a pwm structure. it outputs voice signals to drive a speaker through an external npn transistor when the chip is active. the out1 and out2 pins are configured as pwm structure which can drive 8/16/32 speaker directly. an 8050 type transistor with h fe 150 is recommended for an output driver. - 9 c - * a ( 9 % & ! 6 - 9 c - * a ( 9 % & ! 6 +
+ - 9 c - * a ( 9 % & ! 6
application circuits mask type ht81xxx rev. 1.50 14 november 21, 2006 +

5 9
5 9
5 9
5 9 + + +
5 9
5 9 +

+

ht81xxx rev. 1.50 15 november 21, 2006
+ 5 9
+ 5 9
+ 5 9

otp type ht81xxx rev. 1.50 16 november 21, 2006 +

5 9
5 9
5 9
5 9 + + +
5 9
5 9 +

+
ht81xxx rev. 1.50 17 november 21, 2006
+ 5 9
+ 5 9
+ 5 9

package information 16-pin dip (300mil) outline dimensions (plastic) symbol dimensions in mil min. nom. max. a 745 775 b 240 260 c 125 135 d 125 145 e16 20 f50 70 g 100 h 295 315 i 335 375 0 15 ht81xxx rev. 1.50 18 november 21, 2006 ( ( - ) 9 * ;
ht81xxx rev. 1.50 19 november 21, 2006 copyright 2006 by holtek semiconductor inc. the information appearing in this data sheet is believed to be accurate at the time of publication. however, holtek as - sumes 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 present a risk to human life due to malfunction or otherwise. holtek s products are not authorized for use as critical components in life support devices or systems. holtek reserves the right to alter its products without prior notification. for the most up-to-date information, please visit our web site at http://www.holtek.com.tw. holtek semiconductor inc. (headquarters) no.3, creation rd. ii, science park, hsinchu, taiwan tel: 886-3-563-1999 fax: 886-3-563-1189 http://www.holtek.com.tw holtek semiconductor inc. (taipei sales office) 4f-2, no. 3-2, yuanqu st., nankang software park, taipei 115, taiwan tel: 886-2-2655-7070 fax: 886-2-2655-7373 fax: 886-2-2655-7383 (international sales hotline) holtek semiconductor inc. (shanghai sales office) 7th floor, building 2, no.889, yi shan rd., shanghai, china 200233 tel: 86-21-6485-5560 fax: 86-21-6485-0313 http://www.holtek.com.cn holtek semiconductor inc. (shenzhen sales office) 5/f, unit a, productivity building, cross of science m 3rd road and gaoxin m 2nd road, science park, nanshan district, shenzhen, china 518057 tel: 86-755-8616-9908, 86-755-8616-9308 fax: 86-755-8616-9533 holtek semiconductor inc. (beijing sales office) suite 1721, jinyu tower, a129 west xuan wu men street, xicheng district, beijing, china 100031 tel: 86-10-6641-0030, 86-10-6641-7751, 86-10-6641-7752 fax: 86-10-6641-0125 holtek semiconductor inc. (chengdu sales office) 709, building 3, champagne plaza, no.97 dongda street, chengdu, sichuan, china 610016 tel: 86-28-6653-6590 fax: 86-28-6653-6591 holmate semiconductor, inc. (north america sales office) 46729 fremont blvd., fremont, ca 94538 tel: 1-510-252-9880 fax: 1-510-252-9885 http://www.holmate.com

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